CN104186304B

CN104186304B - A kind of hybrid rice opens the selection of fragrant excellent No. 3

Info

Publication number: CN104186304B
Application number: CN201410401265.2A
Authority: CN
Inventors: 刘武; 余明普; 刘钊; 李义雷; 沈伟
Original assignee: HUAINAN CITY SEED Co Ltd
Current assignee: HUAINAN CITY SEED Co Ltd
Priority date: 2014-08-14
Filing date: 2014-08-14
Publication date: 2016-04-13
Anticipated expiration: 2034-08-14
Also published as: CN104186304A

Abstract

The invention discloses the selection that a kind of hybrid rice opens fragrant excellent No. 3, open 08S for female parent with two-line sterile line, S9817 is that male parent carries out hybrid seeding, obtains new varieties and opens fragrant excellent No. 3.Of the present inventionly open fragrant excellent No. 3 plant height 120.2cm, tillering ability is comparatively strong, and plant type is moderate, and effective fringe is many, and ripening rate is high, and fringe is large, grain is many, grain weight, and ripe phase annesl is better, and lodging tolerance is strong, high temperature resistant.

Description

A kind of hybrid rice opens the selection of fragrant excellent No. 3

Technical field

The present invention relates to a kind of selection of hybrid rice, particularly relate to the selection that a kind of hybrid rice opens fragrant excellent No. 3.

Background technology

Hybrid vigour is the universal phenomenon of biosphere, utilizes hybrid vigour to be one of Main Achievements of modern agriculture science to improve the yield and quality of crops.Paddy rice has obvious hybrid vigour phenomenon, and be mainly manifested in growth vigorous, well developed root system, big panicle many grains per panicle, the aspects such as strong stress resistance, therefore, utilize the hybrid vigour of paddy rice to be the hope that breeding man is dreamed of to increase substantially rice yield always.But most research all concentrates on high yield now, solve the problem yielded poorly, but quality does not improve up, want to improve quality and just must pay larger manpower and materials, the object of high yield cannot be reached.Along with the raising of people's living standard, people are not only satisfied with meal of having enough, and more pursue the quality of paddy rice.Current Hybrid Rice Varieties is various, but there are problems, and most of kind is high often and unexcellent, or excellent and not high, or breeding time is partially long, real Ji Feng, resists, is better than the kind of one few.Therefore, how to select high yield, high-quality, resistance, breeding time short hybrid rice new varieties is a difficult problem always.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of high yield, high-quality, resistance, breeding time short hybrid rice and opens the selection of fragrant excellent No. 3.

Hybrid rice opens the selection of fragrant excellent No. 3, and open 08S for female parent with two-line sterile line, S9817 is that male parent carries out hybrid seeding, obtains new varieties and opens fragrant excellent No. 3.

Hybrid rice of the present invention opens the selection of fragrant excellent No. 3, it is for female parent with two-line sterile line 108S that wherein said two-line sterile line opens 08S, restorer bright extensive 63 is hybridized for male parent, the two-line sterile line that the sterility that the continuous screening through 4 years 7 generations obtains is stable.

Hybrid rice of the present invention opens the selection of fragrant excellent No. 3, and wherein said S9817 raises rice No. 6 for maternal, is that male parent is hybridized with Zhenhui 084, and warp many generations are selected, Selecting breed and identify forms.

Hybrid rice of the present invention opens the selection of fragrant excellent No. 3, and it comprises the steps:

(1) field design: railway carriage or compartment is wide 60 cun, goes than 1:12, male parent spacing in the rows 5.5 cun, and mu plants 0.2 ten thousand caves, cave Basic Seedling more than 10, female parent strain line-spacing 4 × 4 cun, about mu plants 3.4 ten thousand caves, and cave Basic Seedling 6, every mu of Basic Seedling more than 200,000;

(2) parent's date of seeding, broadcast the arrangement of slotting phase and heading flowering period;

(3) nursery period management:

The selection of rice shoot: male parent selects length of time rice seedlings grow 30-35 days, leaf age 5.6-6.0 leaf, seedling is short strong solid, healthy and strong anosis, and the neat white root of growth is many, the rice shoot of individual plant stem tiller more than 10; Female parent selection length of time rice seedlings grow 16-22 days, leaf age 5.5-7 leaf, delicate and pretty anosis, growth neat and consistent, the flat Pu of base portion, short white root is many, the rice shoot of individual plant stem tiller more than 3;

Seedling raising method: male parent two phase all carries out two sections of seedling, maternal employing water-raised seedling;

Mu sowing quantity: male parent 0.5kg, maternal 2kg;

Rice seedling bed area: male parent seedbed 1-1.5m ²/ mu, posts and plants first phase 3 lis of ground; Maternal 1.5 points of ground/mus;

Seeding quantity: male parent is 10 kgs/acre, female parent is 15 kgs/acre;

Rice seedling bed makes: the seedbed gating wind direction sun of male parent, and not by the place of domestic birds and animals harm, length and width are determined according to film and production of hybrid seeds area, and even the old film of paving out, above put the pond sludge 2-3cm that becomes thoroughly decomposed, every square metre is spread at the bottom of Furadan band; Male parent base manure requires in flakes, concentrates plot water conservation, and winter ploughing is frozen and cut down, and turns over for the last time, head executes well-rotted farmyard manure 3000 pounds/acre, does Qi Qian Mu Shi50Jin composite fertilizer wholely, and 20 jin of urea, accomplish whole layer placement of fertilizer, mu, with at the bottom of 4 jin of Furadan bands, is as the criterion with water, furrow face is done flat; Maternal base manure: every mu with well-rotted farmyard manure 3000 jin, three element compound fertilizer 50 jin, 50 jin, carbonic hydroammonium, accomplishes whole layer placement of fertilizer, and rice seedling bed and seed farm irrigation and drainage are at the lower mouth of a river by ditch, and mu, with at the bottom of 4 jin of Furadan bands, prevents and treats Lissorhoptrus oryzophilus Kuschel, rice thrips damage by disease and insect;

Seed soaking: 60 hours seed-soaking time of male parent, period wants duty to change water; Maternal seed adopts the inner wrapping running water interval seed soaking of 10 jin, leaching night dew totally 2 day time day;

Vernalization: the seed of male parent is washed in a pan clean with clear water, use green grass vernalization: filled by green grass in a round-bottomed basket, seed is placed on the centre of round-bottomed basket, 24 hours broken chests, then according to dry long root, the wet principle sprouted, reconciles radical bud length, and green grass continues to heat up, after 24 hours, need burring to lower the temperature, prevent from burning bud; The maternal cool bud of seed normal temperature moisturizing one day, sows after all breaking chest;

Sowing: the seed of male parent is by one mu of production of hybrid seeds 1-1.5m ²requirement make seedbed, uniform broadcasting, does not press paddy or gently presses paddy, lid fine earth, cannot see husk for standard, then covers a small amount of ash, and pond sludge can not be crossed rare and have ponding; Maternal seed is by rice seedling bed area, and seed amount, divides kind by furrow, and point railway carriage or compartment is even to be broadcast, and broadcasts while press paddy, and cannot see husk for standard, can not there be ponding in furrow face;

Seedbed management with post seedling: male parent: take the shed that 50cm is high, first three sky does not leak informaton, as too high in fine day temperature of shed, in the appropriate straw cooling of film upper cover, enter bed the 4th day, grass need be gone to leak informaton to the greatest extent, in conjunction with watering, 1 leaf 1 heart connects film hardening, and 1.5 leaves start to post cultivation, post about 2 leaves, posted and plant density 3 × 3 cun, R1 (first phase male parent) individual plant, cultivation is posted in R2 (the second stage of male parent) two strain, cultivation is posted in whole two strains of rice seedling bed not water conservation, and when posting cultivation, furrow face is anhydrous, furrow ditch full water;

Young plants management: male parent plants latter three days multiple shallow waters, mu chases after 10 jin, urea, topdress to send out by blade later and chase after four times altogether, R2 chases after once less, and when posting cultivation, furrow face is anhydrous, within three days, answer shallow water afterwards to topdress, at least keep the water layer of more than three days after topdressing at every turn, can not leaf with joy, 3 leaf after dates keep shallow waters continuous, seedling stage wants prevention and elimination of disease and pests, in conjunction with weeding of weeding the fields; Female parent keeps furrow face moistening before 3 leaf phases, furrow ditch has water, ensure that male parent is normally turned green, as furrow face cracking adopts filling horse race water noon before and after vertical pin, 3 leaf after date flower water are continuous, and 1 leaf 1 heart is filled with shallow water and chased after fertile for the first time, 10 jin of urea/mus, 2 leaf 1 hearts chase after fertile 15 pounds/acre of second time, and the previous day that first time topdresses is maternal by 15-20 gram of paclobutrazol single spraying, prevention and elimination of disease and pests simultaneously;

(4) Honda is transplanted:

Honda site preparation and fertilization: male parent robs cultivated stubble-cleaning, pours water in time, revolves and rakes, every mu of use 10 jin of Nitrogen, Phosphorus and Potassium add 15 jin of carbon ammoniums by railway carriage or compartment wide bracing wire trench digging deep placement; Maternal first three every mu, sky use of transplanting 100 jin of special fertilizers, an animal-drawn seed plough of dark plane is put down;

Plant specification: male parent railway carriage or compartment is wide 60 cun, spacing in the rows 5.5 cun, Basic Seedling more than 10 is inserted in cave, and mu inserts more than 0.2 ten thousand caves, there is deep water in field, and plant in straw mat seedling afternoon in the morning, do not wash mud, and it is unanimously wide to plant railway carriage or compartment, density is even, and edge sealing is wanted at edge, and cross-peen plants 2-3 strain first phase male parent, pulls up seedlings and rejects special-shaped strain and diseased plant; Maternal removing male parent line-spacing, then remove sunny slope 6 cun, opaco 7 cun, insert 12 row altogether, actual distance between rows and hills 4 × 4 cun, mu plants 3.4 ten thousand caves, and every cave is no less than 6 Basic Seedlings, every mu of Basic Seedling more than 200,000; The rice transplanting of maternal fine day shallow water, cloudy day flower water cutting seedling, rainy day anhydrous rice transplanting, rice transplanting requires shallow, straight, even, does not insert seedling overnight, pulls up seedlings and rejects special-shaped strain and diseased plant;

(5) Honda field management:

Fertilising: male parent preferably executes a ball fertilizer for 3-5 days after planting, and with urea, phosphate fertilizer, each 5 jin of potassium chloride, adds 30-40 jin fine earth, makes stiff mud block, directly distribute equally and fill in male parent in the ranks; Latter 5 days of maternal cultivation, mu 20 jin, urea, Parent completely spreads, and no longer topdresses, and ear differentiation six phase sees that seedling is mended and executes fringe granulated fertilizer urea 5-8 jin, adds each 10 jin of general phosphorus, potassium chloride;

The extermination of disease and insect pest: the early tillering stage adopts pyrrole worm woods to control rice thrips, and mid or late July carries out integrated control;

(6) prediction of flowering period and adjustment:

Forecasting Methodology: mid-July checks male parent, checks female parent at the beginning of the last ten-days period, or pushes away forward with fringe phase beginning in rainy season and within one month, start stripping and look into, and rule of thumb, see the seedling frame of Parent, the jointing situation of male parent judges colored chance situation then; Method is looked in the stripping of children's fringe, and the remaining number of sheets of male parent is when 2.8-3 leaf, in the second phase, now ear differentiation obviously can see that starting stripping looks into, and calculates beginning fringe number of days, calculates the remaining number of days of maternal duration from seeding to heading, and judge that flower chance situation adopts this method, sampling is the stem of first phase;

Flower chance standard: before three phases, the large maternal first phase of male parent, five, six phase Parents maintain an equal level, final maternal than male parent Zao beginning fringe 1-2 days;

Regulation florescence method: take aggregate measures, to urge, the method that short control combines, adopt the combination of one or more in following methods: water is urged, phosphorus potassium is urged, and before three phases, fills with the deep water 7-10 days of more than 2 cun to field, male parent is begun fringe in advance, singly partially executes phosphorus potash fertilizer or sprayed KH every three days to a certain parent ₂pO ₄once, continuous more than three times, also can begin fringe in advance; Drought control, nitrogen control, before the fourth phase, roasting this deferrable of old farmer heading, gave the inclined nitrogen fertilizer application of parent early before three phases; Hormone regulating and controlling: seven end of term sprayed low concentration " 92 O " to slow parent makes it ear in advance;

(7) heading flowering period management:

Cut leaf: according to maternal stem then and the growth differences of tillering, arrange to cut leaf early late, general growth is neat, ears fireballing, and leaf is cut in heading 5%, and cutting leaf can not be too heavy, and sword-like leave will stay 7-8cm;

Anti-assorted pure keeping: before cutting leaf, male parent will remove special-shaped strain line by line, cut the high-rise fringe of maternal all not luxuriant stems in the ranks during leaf, connect root complete stool and cut off, before using hormone, pull out female parent chrysanthemum medicine and polliniferous hybrid strain in the ranks before garland every day, remove line by line again before harvesting and once omit hybrid strain;

Use hormone: the morning, dew did the hormotone to adopting " 92 O " hormone or employing " 92 O " hormone and Hua Tiaoling before blooming, hormone application total amount is 20-30 gram, when adopting " 92 O " hormone, first time heading index 5-10% mu is with 10 grams, second time heading index more than 20%, mu 10-15 gram, third time mends 5-10 gram as the case may be;

Artificial supplementary pollination: first time pollination is opened grain husk with female parent and is as the criterion, and has pollen to be as the criterion later, catch emphatically the pollination of the loose powder peak period of male parent with male parent; Method: catch up with the plastic ties of powder or 0.4cm to draw powder with bamboo pole; Principle: early stage weighs grain, and the later stage gently draws or oblique pull, and wind is little to be drawn soon, and wind draws greatly slowly, draws against wind, and full-bloom stage is no less than 5 times/day;

The extermination of disease and insect pest: Parent carries out an integrated control before cutting leaf, control ear stem pest, garland terminates rear spray KH ₂pO ₄add triadimefon, later stage control rice fulgorid;

(8) During Grain-filling:

Water starch management: have water to grow flower, dry wet strong seed, the later stage can not cut off the water supply too early;

Spray leaf fertilizer: the pustulation period sprays and once likes the nutrition that seedling or generation seedling or other favourable full seed color and luster are good-looking, and prevents and treats rice fulgorid, ear stem pest, the insect pest of grain seasonal febrile diseases;

In good time results: maternal pollination terminates the following grain Calusena lansium of 18-20 days or maternal high-rise fringes, firmly squeezing not pulp can gather in, and use thresher threshing, be strictly on guard against seed of running over and injure, dry in time, storage singly will be piled and singly be put.

(A) floppy disk seedling:

Floppy disk seedling standard: appropriate density, height of seedling is moderate, straight uniform, and every square centimeter has seedling 2-2.5 strain; Height of seedling 15-17 centimetre, contracting angle seedling is no more than 10%; Length of time rice seedlings grow 20-25 days, leaf age 3.8-4.2 leaf; Well developed root system, packing is good;

Seedling material prepares:

Plastic floppy disk: long 58 centimetres of floppy disk, wide 28 centimetres, every mu of land for growing field crops needs floppy disk 20;

Bed soil: bed soil require thin, pine, fertile, without grass-seed; Loosen the soil in nonirrigated farmland or vegetable plot, rice field table soil and the fertilizer become thoroughly decomposed, all can be used as bed soil, and every mu of land for growing field crops needs 150 kilograms, bed soil; Before seedling, hack is mixed upper part decomposed manure, break into pieces and sieve, every mu of land for growing field crops fine earth 100 kilograms, adds seedling strengthen agent 200 grams, even mix, banks up stand-by;

Plastic film: every mu of land for growing field crops should get out film by the requirement of long 7 meters, wide 1.5 meters;

Small bamboo: calculate by every mu of land for growing field crops, need small bamboo 10;

Straw: calculate by every mu of land for growing field crops, need straw 15 kilograms;

Seedbed makes:

Seedbed selection of land: seedbed selects that landform is smooth, physical features is high and dry, irrigation and drainage are convenient, be convenient to the field of transporting;

Rice seedling bed, land for growing field crops ratio: rice seedling bed and land for growing field crops ratio are 1:100;

Seed bed preparation: rice seedling bed wants non watered ploughing water whole, and face, field is smooth;

Seedbed specification: bedside 1.4 meters, furrow width 30 centimetres, encloses ditch depth more than 25 centimetres by dark 20 centimetres;

Sowing:

Put floppy disk: 2 seedling dishes are horizontally arranged on seedbed, are connected to each other, close-packed arrays;

Paving soil: in dish, subsoil will spread evenly, the thick 1.5-2.0 centimetre of subsoil;

Sow seeds: seed is evenly sprinkling upon in dish on subsoil, often dish kind of a 80-85 gram, for making seed even, can divide and sow seeds for 2-3 time;

Earth backing: after planting, immediately even earth backing, general thickness 0.5 centimetre, accomplishes not reveal seed;

Pour water: after sowing blinding, start upper water, make Nutrition Soil water suction in dish, reach saturation state; After first-class water, till rice seedling bed water is put into semlsulcus, so that regulate rice seedling bed humidity, be conducive to Miao Qimiao complete;

Put small bamboo: after planting on seedbed, put 1 small bamboo every 7-8 cun, long 1.4 meters of described small bamboo;

Epiphragma: after bamboo pole sets, covers plastic film immediately, and surrounding compresses;

Lid grass: cover straw on film, reach shade, lower the temperature, moisture-keeping function;

Young plants management:

Before Guan Shui: 1 leaf 1 heart, keep flat ditch-water, make the moistening non-whitening of card, regulate aqueous vapor, in order to packing; 2-3 leaf duty to be had a ride on a horse water, transplant first 5 days hardenings of cutting off the water;

Take off film: after broadcasting rear 5-6 days neat seedlings, 1 leaf 1 heart takes off film;

Topdress: take off film hardening after 1 day, impose wean in conjunction with upper water fertile, mu executes 6 kilograms, urea, sprinkles water immediately after fertilising, with unburned seedling; Within first 5 days, impose to send in transplanting and transfer fertilizer, mu executes 8 kilograms, urea;

Diseases and pests controlling: nursery period most disease and pest have seedling pest, thrips, snout moth's larva, small brown rice planthopper etc., pay close attention to, prevent and treat in time.

(B) transplanting

Wholely:

Non watered ploughing is suned the earth which has been ploughed up, tilling depth 3-5 cun, harrow-like implement for pulverizing soil rake leveling of pouring water after upturned soil is dry, and accomplish that native broken mud is rotten, face, field is smooth;

The machine transplanting of rice:

Volume seedling, fortune seedling: volume seedling, fortune seedling want careful, must guard against and firmly pull;

Machine on seedling sheet: during upper machine, seedling sheet lies in frame, the level of overlapping dress seedling is too much unsuitable;

Adjustment facility: according to density requirements, the spacing in the rows of adjustment rice transplanter and seedling pawl seedling taking amount;

Machine transplanting of rice density: every mu of 2.0-2.4 ten thousand cave, every cave plants 5 seedlings, every mu of Basic Seedling 10-12 ten thousand;

Water starch management:

Alive-tiller: machine transplanting of rice rice shoot individuality is little, and seedling-protection of should pouring water in time after the machine transplanting of rice, in case sunburn seedling.Accomplish alive of cun water, shallow water is tillered;

Tillering regularity: at tillering regularity, when seedling number reaches spike number seedling, during every mu of seedling number 180,000, field is baked in timely draining, and roasting Tian Yaoxian gently weighs afterwards, and gradation is carried out, and to control ineffective tillering, guarantees that mid-term is surely long, and it is shallow that transplanting is planted, and root system is many at upper soll layer;

Booting blooming stage: fill with deep water

Pustulation period: take intermittent irrigation, remain that field is moistening, the later stage can not cut off the water supply too early;

Fertilising:

Total fertilization amount: per mu yield paddy 600 kilograms, the field of medium above soil fertility, mu executes purity nitrogen 12-13 kilogram, and the poor field mu of soil fertility executes purity nitrogen 14 kilograms, and nitrogen phosphoris and potassium fertilizer ratio is 1:0.5:0.6;

Fertilizer application: base, tiller, fringe granulated fertilizer ratio are 6:3:1;

Base manure: mu executes purity nitrogen 7.5 kilograms, folding 16 kilograms, urea, collocation phosphorus pentoxide 6.5 kilograms, potassium oxide 7.5 kilograms, is spread on ground before plowing, and ploughs under in soil immediately;

Tillering fertilizer: impose tillering fertilizer in after the machine transplanting of rice 5-7 days, mu executes 9 kilograms, urea;

Fringe granulated fertilizer: falling 2 leaf dew points to the cut phase, drink according to the growth of cereal crop seedlings and execute fringe granulated fertilizer, mu is executed urea and is less than or equals 3 kilograms;

Topdress when should there is no water layer in field and use, wait fertilizer to be adsorbed by soil and go up water again;

Chemical weed control: 5-7 days after the machine transplanting of rice, carries out chemical weed control with weed killer herbicide;

The extermination of disease and insect pest.

The selection difference from prior art that hybrid rice of the present invention opens excellent No. 3 of perfume is: the selection that hybrid rice of the present invention opens excellent No. 3 of perfume selects the 08S that opens that big panicle many grains per panicle, tillering ability are comparatively strong, good grain quality, coordinate force are strong to be female parent; Select that big panicle many grains per panicle, tillering ability are strong, good grain quality, in ripe, that stem stalk is sturdy S9817 be that male parent obtains new varieties and opens fragrant excellent No. 3, this kind plant height 120.2cm, tillering ability is comparatively strong, and plant type is moderate.Effective fringe is many, and ripening rate is high, and fringe is large, grain is many, grain weight.Every total grain panicle number 177.6, ripening rate 86.5%, thousand kernel weight 28.7g.Ripe phase annesl is better.Lodging tolerance is strong, Disease Resistance Identification: rice blast 5-5 level, bacterial leaf-blight 1-3 level, banded sclerotial blight 5-7 level, false smut 1-7 level, stripe virus disease 0-0 level.The 132.8 days time of infertility, 838 precocity more excellent in II 4.7 days.Lodging tolerance is strong.High temperature resistant.This combination heading flowering period runs into the hot weather of continuous more than 35 DEG C, and ripening rate still reaches more than 82%.This kind more than per mu yield 600kg; Rice matter reaches GB and eats the third-class standard of rice; Resistant to lodging, resistance against diseases is strong; The time of infertility is short.

Output: participate in Zhong Xianzu district of province examination average yield per mu 606.8kg for 2008,838 volume increase 2.71% more excellent in contrast II; Within 2009, participate in the examination of Zhong Xianzu district of province, average yield per mu 607.04kg, 838 volume increase 5.78% more excellent in contrast II, reach pole significance level.Two annual per mu yield 606.92kg, 838 volume increase 4.36% more excellent in contrast II.

Quality: this variety and quality meet promulgated by the ministries or commissions of the Central Government third-class-fourth class eats rice quality standard.

Resistance: Disease Resistance Identification: rice blast 5-5 level, bacterial leaf-blight 1-3 level, banded sclerotial blight 5-7 level, false smut 1-7 level, stripe virus disease 0-0 level.

The specificity of kind, adaptability: there is short awns on most of grain top.Be suitable in yangtse-huaihe region plantation, the 132.8 days time of infertility, 838 precocity more excellent in II 4.7 days.

Variety stability and uniformity: variety stability is good, except male sterile line and hybrid strain, do not find special-shaped plant.The growth of this kind is neat, and leaf, fringe shape, plant height, strain shape are consistent.

The selection that hybrid rice of the present invention opens excellent No. 3 of perfume is according to objective trait of the present invention, improve in the details of each step of rice cropping and the production of hybrid seeds, only have the new varieties adopting selection of the present invention just can obtain having objective trait of the present invention to open fragrant excellent No. 3.

Below in conjunction with specific embodiment, the selection that hybrid rice of the present invention opens fragrant excellent No. 3 is described further.

Embodiment

Embodiment 1

Opening fragrant excellent No. 3 is the two-line hybrid rice new varieties of seed selection, and by test cross combo, qualification and varietal yield test, the output of this kind, quality, resistance, breeding time and biology morphology feature, general performance is good.

One, breeding objective

Conscientiously screen Parents (Parent), carry out science combo, make its pluses and minuses complementary, select the hybrid rice new varieties of high yield, high-quality, resistance, moderate growth duration.Objective trait designs: more than per mu yield 600kg; Rice matter reaches GB and eats the third-class standard of rice; Resistant to lodging, resistance against diseases is strong; The time of infertility is short.

Two, breeding method

Opening fragrant excellent No. 3 takes group gas-mixing hybridization method to be bred as.1-2 before combo, has carried out conscientiously observing record to various male sterile line, restorer, has grasped its feature, output, meter Zhi, anti-adversity ability and breeding time etc.According to breeding objective requirement, we have selected big panicle many grains per panicle, the tillering ability 08S that opens that is medium, good grain quality is maternal.Have selected that big panicle many grains per panicle, tillering ability are strong, good grain quality, plant is short, stalk is sturdy, ripe S9817 is early male parent, make its group gas-mixing hybridization, final seed selection becomes Feng You to have both, breeding time is short opens fragrant excellent No. 3.

Three, breeding process

Maternal: to open 08S system with two-line sterile line 108S for female parent, restorer bright extensive 63 is hybridized for male parent, screens the stable two-line sterile line of the sterility of acquisition through 4 years 7 generations continuous.

Male parent: S9817 raises rice No. 6 for maternal, is that male parent is hybridized with Zhenhui 084, and warp many generations are selected, Selecting breed and identify forms.

Positive season in 2005, to open 08S for female parent, take S9817 as male parent, carry out hybridization combo.October will the seed of results then, and send Lingshui county of Hainan Province to identify, this assembled growth is neat, growing way is in great numbers, big panicle many grains per panicle, general performance is good.2 years April of-2007 years in April, 2005, carry out product ratio (qualification) test respectively in city of Huainan City of Anhui Province, all show that output is high, rice is of fine quality, better resistance and breeding time short feature.Within 2005, to open 08S for female parent, take S9817 as male parent test cross combo, in October, 2005-2007 year April, repeatedly carry out in fine jade two places, Anhui identifying, variety comparative test seed selection forms.Within 2007-2009 years, enter Xian group test in Anhui Province.

Four, the main morphological features of kind

This kind plant height 120.2cm, tillering ability is comparatively strong, and plant type is moderate.Effective fringe is many, and ripening rate is high, and fringe is large, grain is many, grain weight.Every total grain panicle number 177.6, ripening rate 86.5%, thousand kernel weight 28.7g.Ripe phase annesl is better.Lodging tolerance is strong, Disease Resistance Identification: rice blast 5-5 level, bacterial leaf-blight 1-3 level, banded sclerotial blight 5-7 level, false smut 1-7 level, stripe virus disease 0-0 level.The 132.8 days time of infertility, 838 precocity more excellent in II 4.7 days.

Five, output, quality, resistance

1, output: participate in Zhong Xianzu district of province examination average yield per mu 606.8kg for 2008,838 volume increase 2.71% more excellent in contrast II; Within 2009, participate in the examination of Zhong Xianzu district of province, average yield per mu 607.04kg, 838 volume increase 5.78% more excellent in contrast II, reach pole significance level.Two annual per mu yield 606.92kg, 838 volume increase 4.36% more excellent in contrast II.

2, quality: this variety and quality meet promulgated by the ministries or commissions of the Central Government third-class-fourth class eats rice quality standard.

3, resistance: Disease Resistance Identification: rice blast 5-5 level, bacterial leaf-blight 1-3 level, banded sclerotial blight 5-7 level, false smut 1-7 level, stripe virus disease 0-0 level.

Six, specificity, the adaptability of kind

There is short awns on major part grain top.

Be suitable in yangtse-huaihe region plantation, the 132.8 days time of infertility, 838 precocity more excellent in II 4.7 days.

Seven, variety stability and uniformity

Variety stability is good, except male sterile line and hybrid strain, does not find special-shaped plant.

The growth of this kind is neat, and leaf, fringe shape, plant height, strain shape are consistent.

Eight, kind resistance characteristic

Lodging tolerance is strong.

High temperature resistant, this combination heading flowering period runs into the hot weather of continuous more than 35 DEG C, and ripening rate still reaches more than 82%.

Nine, cultural technigue

1, seedling is strengthened in light seeding: drought is educated, water is educated, and carries out that light seeding is even broadcasts, and rice seedling bed seeding quantity every mu of 12.5kg, cultivates many tillers and strengthen seedling.Spray paclobutrazol before 2 leaves, impel and increase that tiller, root are prosperous, Miao Zhuan.

2, begin sowing in good time: in sowing at the beginning of area, Huaihe River by the end of April to 5 month, within length of time rice seedlings grow 30-35 days, transplant.Can suitably do sth. in advance in Hefei areas to the south.

3, rational close planted: mu cave number 1.7-1.8 ten thousand, 1-2 grain seed seedling is planted in every cave, mu Basic Seedling 7-8 ten thousand.

4, apply fertilizers scientifically: take " front heavy, middle control, rear benefit " to apply fertilizer tactful, carry out rational application of fertilizers.Mu executes the fertile 15k of N _g, NPK ratio is 1: 0.5: 0.6.Base tiller ear manuer ratio is 6: 3: 1.

5, water starch management: shallow water transplants seedlings, alive of very little water, thin moisture tiller, bakes field during mu seedling number 16-18 ten thousand, deep water heading flowering, pustulation period intermittent irrigation, and the later stage keeps field moistening, gathers in and cuts off the water supply for first 7 days, guarantees that the blue or green fringe of stalk is yellow.

6, diseases and pests controlling: the damage by disease and insect such as snout moth's larva, striped rice borer, rice fulgorid, banded sclerotial blight, false smut are indulged in control in time.

It is of the present invention that to open concrete breeding method in the breeding process of fragrant excellent No. 3 as follows:

(1), field design: railway carriage or compartment is wide 60 cun, and row is than 1:12, and male parent spacing in the rows 5.5 cun, mu plants 0.2 ten thousand caves, cave Basic Seedling more than 10.Female parent strain line-spacing 4 × 4 cun, about mu plants 3.4 ten thousand caves, cave Basic Seedling 6, every mu of Basic Seedling more than 200,000.Male parent becomes fringe more than 40,000, and maternal more than 220,000.Ripening rate about 45%, thousand kernel weight about 27 grams, per unit area yield more than 200 kilograms.

(2), parent's date of seeding, broadcast the arrangement of slotting phase and heading flowering period: R1 (first phase male parent) 16/5 sows, and estimates duration from seeding to heading 89 days, i.e. 13/8 beginning fringe; R2 (the second stage of male parent) 24/5 sows, and estimates duration from seeding to heading 86-87 days, i.e. 16/8 beginning fringe; R2 and R1 difference 8-9 days.Maternal duration from seeding to heading 75 days ± 1 day.The desirable colored chance of this combination is maternal early heading 1-2 days, and the sowing time of so maternal 12-13/8 beginning fringe should be 1/6.Be 16 ± 1 days with the time difference of R1, about leaf differs from 5.8 leaves, full-bloom stage is in 16-18 day in August.

(3) nursery period management:

The selection of rice shoot: male parent selects length of time rice seedlings grow 30-35 days, leaf age 5.6-6.0 leaf, seedling is short strong solid, and leaf is delicate and pretty does not hang down loosely, healthy and strong anosis, and the neat white root of growth is many, the rice shoot of individual plant stem tiller more than 10; Female parent selection length of time rice seedlings grow 16-22 days, leaf age 5.5-7 leaf, delicate and pretty anosis, growth neat and consistent, the flat Pu of base portion, short white root is many, the rice shoot of individual plant stem tiller more than 3;

Mu sowing quantity: male parent 0.5kg, maternal 2kg;

Seeding quantity: male parent is 10 kgs/acre, female parent is 15 kgs/acre;

Rice seedling bed makes: the seedbed gating wind direction sun of male parent, and not by the place of domestic birds and animals harm, length and width are determined according to film and production of hybrid seeds area, and even the old film of paving out, above put the pond sludge 2-3cm that becomes thoroughly decomposed, preferably every square metre is spread at the bottom of Furadan band; Male parent base manure requires in flakes, concentrates plot water conservation, and winter ploughing is frozen and cut down, and turns over for the last time, head executes well-rotted farmyard manure 3000 pounds/acre, does Qi Qian Mu Shi50Jin composite fertilizer wholely, and 20 jin of urea, accomplish whole layer placement of fertilizer, mu, with at the bottom of 4 jin of Furadan bands, is as the criterion with water, furrow face is done flat; Maternal base manure: mu well-rotted farmyard manure 3000 jin, three element compound fertilizer 50 jin, 50 jin, carbonic hydroammonium, accomplishes whole layer placement of fertilizer, and rice seedling bed and the necessary irrigation and drainage convenience of seed farm, preferably at the lower mouth of a river by ditch.Mu with at the bottom of 4 jin of Furadan bands, keypoint control Lissorhoptrus oryzophilus Kuschel, rice thrips;

Vernalization: the seed of male parent is washed in a pan clean with clear water, use green grass vernalization: filled by green grass in a round-bottomed basket, seed is placed on the centre of round-bottomed basket and green grass, within about 24 hours, can chest be broken, then according to dry long root, the wet principle sprouted, reconcile radical bud length, notice that green grass continues to heat up, after general 24 hours, need burring to lower the temperature, prevent from burning bud; The maternal cool bud of seed normal temperature moisturizing one day, sows after all breaking chest;

Sowing: the seed of male parent is by one mu of production of hybrid seeds 1-1.5m ²requirement make seedbed, uniform broadcasting, does not press paddy or gently presses paddy, lid fine earth, is advisable, then covers a small amount of ash cannot see husk, note pond sludge can not cross rare ponding; Maternal seed is by rice seedling bed area, and seed amount, divides kind by furrow, and point railway carriage or compartment is even to be broadcast, and broadcasts while press paddy, and cannot see husk for standard, can not there be ponding in furrow face;

Seedbed management with post seedling: male parent: take the shed that 50cm is high, first three sky does not leak informaton, as too high in fine day temperature of shed, in the appropriate straw cooling of film upper cover, enter bed the 4th day, grass need be gone to leak informaton to the greatest extent, in conjunction with watering, 1 leaf 1 heart connects film hardening, and 1.5 leaves start to post cultivation, post about 2 leaves, posted and plant density 3 × 3 cun, R1 individual plant, cultivation is posted in the two strain of R2, cultivation is posted in whole two strains of rice seedling bed not water conservation, and when posting cultivation, furrow face is anhydrous, furrow ditch full water;

Young plants management: male parent plants latter three days multiple shallow waters, and mu chases after 10 jin, urea, topdress to send out by blade chases after four times later altogether, it is anhydrous that R2 chases after furrow face when once posting cultivation less, within three days, answers shallow water afterwards and topdress, at least keep the water layer of more than three days at every turn after topdressing, can not leaf with joy, 3 leaf after dates keep shallow waters continuous.Seedling stage, Major Pests was exactly rice thrips, can not cause great insect pest as long as make good use of at the bottom of Furadan band, and late May starts have snout moth's larva to occur, prevents and treats with dimehypo.In conjunction with weeding of weeding the fields; Female parent keeps furrow face moistening before 3 leaf phases, furrow ditch has water, ensure that male parent is normally turned green, as furrow face cracking adopts filling horse race water noon before and after vertical pin, 3 leaf after date flower water are continuous, and 1 leaf 1 heart is filled with shallow water and chased after fertile for the first time, 10 jin of urea/mus, 2 leaf 1 hearts chase after fertile 15 pounds/acre of second time, and the previous day that first time topdresses is maternal by 15-20 gram of paclobutrazol single spraying, prevention and elimination of disease and pests simultaneously.

(4) Honda is transplanted:

Plant specification: male parent railway carriage or compartment is wide 60 cun, spacing in the rows 5.5 cun, plant between 33, Basic Seedling more than 10 is inserted in cave, mu inserts more than 0.2 ten thousand caves, and there is deep water in field, and the morning, straw mat seedling was planted afternoon, do not wash mud, plant railway carriage or compartment unanimously wide, density is even, and edge sealing is wanted at edge, cross-peen plants 2-3 strain first phase male parent, pulls up seedlings and rejects special-shaped strain and diseased plant; Maternal removing male parent line-spacing, then remove sunny slope 6 cun, opaco 7 cun, insert 12 row altogether, actual distance between rows and hills 4 × 4 cun, mu plants 3.4 ten thousand caves, and every cave is no less than 6 Basic Seedlings, every mu of Basic Seedling more than 200,000; The rice transplanting of maternal fine day shallow water, cloudy day flower water cutting seedling, rainy day anhydrous rice transplanting, rice transplanting requires shallow, straight, even, does not insert seedling overnight, pulls up seedlings and rejects special-shaped strain and diseased plant;

(5) Honda field management: early stage bang to such an extent that rises, mid-term is steady must live, and after entering mid-July, all management are met around containing to spend, promotion Parent harmonic growth.

Water starch management: alive of deep water, shallow water, flower moisture tiller, the enough roasting field of seedling, ear differentiation four after date can not bake field;

Rogueing: combine fertilising, the different obvious hybrid strain of various feature is pulled out in weeding of weeding the fields;

The extermination of disease and insect pest: a point early tillering stage cures mainly rice thrips, recommends with pyrrole worm woods; Mid or late July will carry out an integrated control, mainly prevents and treats 5 (three) for rice leaf roller, banded sclerotial blight, white-backed planthopper, rice plant skipper, striped rice borer etc.

(6) prediction of flowering period and adjustment:

Forecasting Methodology: mid-July checks male parent, checks female parent at the beginning of the last ten-days period, or pushes away forward with fringe phase beginning in rainy season and within one month, start stripping and look into, and rule of thumb, see the seedling frame of Parent, the jointing situation of male parent judges colored chance situation then; Method is looked in the stripping of children's fringe, the remaining number of sheets of male parent is when 2.8-3 leaf, in the second phase, now ear differentiation obviously can see that starting stripping looks into, calculate to beginning fringe number of days, calculate the remaining number of days of maternal duration from seeding to heading, judge this method of flower chance situation, sampling must be the stem of first phase, must be representative, definitely can not error in judgement;

Regulation florescence method: take aggregate measures, to urge, short control combines, and adjusts flower measure to want early, accurate and wants ruthless, adopt the combination of one or more in following methods:

1, water is urged, and phosphorus potassium is urged, and before three phases, utilizes male parent to the characteristic of water sensitive, fills with the deep water 7-10 days of more than 2 cun to field, and male parent can be made to begin in advance fringe, singly partially executes phosphorus potash fertilizer to a certain parent or sprays KH every three days ₂pO ₄once, continuous more than three times, also can begin fringe in advance;

2, drought control, nitrogen control, before the fourth phase, roasting this deferrable of old farmer heading, gave the inclined nitrogen fertilizer application of parent early before three phases;

3, hormone is adjusted: seven end of term sprayed low concentration " 920 " to slow parent and can ear in advance.

(7) heading flowering period management: main direction: improve outcrossing, anti-assorted pure keeping, improves seed quality.

Use hormone: mu consumption: total amount 20-30 gram, some places coordinate flower to adjust spirit to use, and total amount is the same.Flower adjusts spirit every bottle containing 4 grams " 92 O ", as with 92 O that should deduct equivalent.Method: " 92 O " uses does not have certain pattern, must grasp field conditions, because of sky, because seedling considers, general first time ears index 5-10% mu with 10 grams, second time more than 20%, mu 10-15 gram.Third time mends 5-10 gram as the case may be, and the overall principle will have flexibility; Slow in one day according to the heading of above index second time, ear fast not every other day, many respraying of tassel, few light spray;

Time: the morning, dew was done to before blooming;

Water consumption: the most handy atomizing sprayer can save about 1/3 " 92 O ", by knapsack sprayer holes in spraying sheet (0.7mm), 0.07 hectare one watering can water.

Artificial supplementary pollination: first time pollination is opened grain husk with female parent and is as the criterion, and has pollen to be as the criterion later, catch emphatically the pollination of the loose powder peak period of male parent with male parent.Method: powder caught up with by the most handy bamboo pole, labor stringency also can draw powder by the plastic ties of 0.4cm; Principle: early stage weighs grain, and the later stage gently draws or oblique pull, and wind is little to be drawn soon, and wind draws greatly slowly, draws against wind, and number of times full-bloom stage is no less than 5 times/day.

The extermination of disease and insect pest: must carry out an integrated control before Parent cuts leaf, add the medicine of control ear stem pest, full-bloom stage does not generally spray other medicament, and garland terminates spray KH ₂pO ₄add triadimefon, the later stage will pay special attention to the control of rice fulgorid.

(8) During Grain-filling:

Spray leaf fertilizer: the pustulation period sprays and once likes the nutrition that seedling or generation seedling or other favourable full seed color and luster are good-looking, and note rice fulgorid, ear stem pest, grain pest, if any adding control;

In good time results: general maternal pollination terminates about 18-20 days, or the grain Calusena lansium that maternal high-rise fringe is following, firmly squeezing not pulp can gather in, the most handy thresher threshing, is strictly on guard against that seed impact of running over and injure is germinateed, dries in time.Storage singly will be piled and singly be put, and is strictly on guard against mechanical admixture.

Two-line sterile line opens 08S seed selection:

One, cultivar origin

Open 08S be seeds company of Huainan City with high-quality two-line sterile line 108S for female parent, with high yield and high quality restorer bright extensive 63 for male parent is hybridized, through the continuous selection seed selection in 4 years 7 generations, selected proterties neat and consistent in 2003, the two-line sterile line that sterility is stable, tentatively titled opens 08S.

Two, Breeding Process

Positive season in 2000, with the japonica rice 108S of academy of agricultural sciences of Liaoning Province seed selection for female parent, hybridize with high yield and high quality restorer bright extensive 63, obtain F0 for hybrid seed.November is in Lingshui, Hainan Province plantation F1 generation then, and growing way is fine, normally solid.

Calendar year 2001 in positive season, the strain of plantation colony more than 3000, therefrom selected sterile strain 8 strain that proterties is excellent, grow fine in Huainan plantation F2 generation.In Ratooning reproduction mid-September, make its self-fertility in low temperature, short-day situation.Eliminate 3 not solid individual plants to mid-October, retain to have from sterile transferring to and can to educate and can self-fruitful 5 individual plants, obtain F ₃for seed.F is planted November then in Hainan ₃for 5 plants, therefrom select the individual plant 5 that plant type is moderate, growing way is healthy and strong.

2002 positive plants F in Huainan in season ₄for 5 strains, carry out economical character and Fertility identification, the elite plant strain 1 that selection traits neat and consistent, sterility are stable, still take Ratooning reproduction method, obtain F ₅for seed.In November then, add generation plantation F in Hainan ₅generation.

2003 positive plants F in Huainan in season ₆in generation, carry out test cross combo, so far economical character, sterility are basicly stable simultaneously.November in the same year plants F in Hainan ₇generation, expanding propagation seed.

Three, feature

1, morphological feature

Open 08S plant type degree of tightness moderate, leaf look pale green, the slightly wide curls inward of sword-like leave, grow delicate and pretty, proterties neat and consistent, plant height 70.1cm, column cap and bran point colourless, stigma exposing ratio 63.5%, wherein two exposing accounts for 27.2%, and tillering ability is comparatively strong, individual plant stem tiller 9.5, leaf number of the main culm 12.5-13.5 leaf, average 13 leaves.Average spike length 22.6cm, grains per panicle about 110, thousand kernel weight about 25 grams.

2, duration from seeding to heading

According in Huainan, Hainan observes: open 08S in sowing in Huainan May, duration from seeding to heading 66-78 days, how at about 68 days.Sow by the end of November in Hainan, duration from seeding to heading 90-105 days; January is sowed, duration from seeding to heading 95-105 days.

3, fertility performance

2006, within 2007, at Huainan interval sowing, bagging and microscopy, observe and open 08S fertility under field conditions (factors) dynamically, two is average annual with 15-June 24 May, every 10 days 1 phases of sowing.From beginning fringe, every 1 day, carry out microscopy, bagging respectively, investigate pollen abortion degree and bagging self-fruitful rate.

Opening 08S2006 at Huainan steady sterile period is 19-August 30 July, and pollen abortion rate is 100%, bagging self-fruitful rate except July 19 be except 0.1%, 20-August 30 July is 0, and steady sterile period is more than 40 days.Within 2007, pollen abortion rate is from 17-August 30 July, except July 19 was that except 99.9%, all the other are 100%, bagging self-fruitful rate except July 17 be that except 0.1%, all the other are 0, steady sterile period 44 days (see table 1).

4, flowering habit

, bloom concentrated, heading was bloomed the same day or second day during flower early.It is 9: 30 that fine day begins to take time, and full-bloom stage is 10: 30-12: 00.Florescence is longer, and the individual plant florescence reaches about 10 days.

Four, combo performance

Open 08S and show good coordinate force, the hybrid combination common manifestation tillering ability made is strong, and ripening rate is high, and amount of increase in production is obvious.The kind of combo has out excellent No. 2, opens 08S/9810, opens 08S/9819.

08S fertility performance under the natural conditions of Huainan opened by table 1.

Concise and to the point technical descriptioon and basic mechanical design feature index:

Sterile gene and duration from seeding to heading:

Open 08S in Huainan sowing in May, duration from seeding to heading 66-78 days, how at about 68 days.Sow by the end of November in Hainan, duration from seeding to heading 90-105 days.Opening 08S2006 at Huainan steady sterile period is 19-August 30 July, and pollen abortion rate is 100%, bagging self-fruitful rate except July 19 be except 0.1%, 20-August 30 July is 0, and steady sterile period is more than 40 days.Within 2007, pollen abortion rate is from 17-August 30 July, except July 19 was that except 99.9%, all the other are 100%, bagging self-fruitful rate except July 17 be that except 0.1%, all the other are 0, steady sterile period 44 days.

Flowering habit:

Morphological feature:

Plant type degree of tightness is moderate, leaf look pale green, and the slightly wide curls inward of sword-like leave, grows delicate and pretty, proterties neat and consistent, plant height 70.1 _cm, column cap and bran point colourless, stigma exposing ratio 63.5%, wherein two exposing accounts for 27.2%, and tillering ability is comparatively strong, individual plant stem tiller 9.5, leaf number of the main culm 12.5-13.5 leaf, average 13 leaves.Average spike length 22.6cm, grains per panicle about 110, thousand kernel weight about 25 grams.

On August 14th, 2008, Crop breed audit committee orgaization of Anhui Province relevant expert does female parent to seeds company of the Huainan City japonica rice 108S of academy of agricultural sciences of Liaoning Province seed selection, hybridizes selected the long-grained nonglutinous rice temperature-sensitive sterile line be bred as to open 08S through 4 years 7 generations to have carried out technical appraisement with the restorer 9818 of self-fertile.Expert has listened to the Breeding Report on A New of seed selection unit, has consulted relevant technologies data, has investigated field male sterile line plantation colony, taken a sample to check bagging self-fertility and pollen abortion situation, and has addressed inquires to regard to relevant issues.Through discussing fully, unanimously think:

1, by the investigation to field 1200 strain plantation colony, this male sterile line plant type degree of tightness is moderate, the slightly wide curls inward of sword-like leave blade, and tillering ability is comparatively strong, grows delicate and pretty, and bran is sharp and column cap is colourless, proterties neat and consistent, sterile plant rate 100%.

2, this male sterile line sterility is stablized: investigate sowing on May 14 by random sampling, July 21 beginning fringe 106 of bagging strain fringes, 10812 grain husk flowers, do not find solid grain husk flower, the unreal rate of bagging selfing; Microscopy sowing on May 24,107 strain fringes of heading on August 14,535 grain husk flowers, 21400 pollen, do not find fertile pollen, pollen abortion rate is 100.00%.

3, research data shows, opens 08S in sowing in Huainan the first tenday period of a month in May, duration from seeding to heading about 68 days, steady sterile period more than 30 days, stigma exposing ratio and outcrossing seed-setting rate higher, restorability is good, and coordinate force is stronger.

In sum, this male sterile line Comprehensive Traits is excellent, economical character neat and consistent, and sterility is stablized.Reach rice sterile line criterion for breeding, agree unanimously and be tested and appraised.

Popularizing application prospect and measure: " opening 08S " is detected through Ministry of Agriculture's rice and quality of item supervision and inspection center: chalkiness degree 2.0, transparency 1, caustic SCC 7.0, gel consistence 85, protein 11.6%, outward appearance and physical and chemical quality are all good, for the apolegamy of Good quality hybrid rice Combination nova and the industrialization of Good quality hybrid rice significant, its popularizing application prospect is wide, can take breed in Hainan winter, and positive season is to continent combo and the production of hybrid seeds.

Open the high-yield cultivating method of fragrant excellent No. 3 machine rice transplantations:

Opening fragrant excellent No. 3 is the double-linear hybrid rice Combination nova of seeds company of Huainan City seed selection.The feature such as have that output is high, rice is of fine quality, disease resistance is comparatively strong, breeding time is short, suitablely manually to plant, machine sowing, the planting patterns such as live, by using high-yield cultivation method, opening fragrant excellent No. 3 machine rice transplantations and can obtain high yield and efficient.

Opening fragrant excellent No. 3 is that seeds company of Huainan City is to open the two-line hybrid rice Combination nova of 08S and S9817 combo seed selection.This combination plant height about 121cm, stem stalk is sturdy, grow prolifically, and tillering capacity is comparatively strong, later stage ripe lover.In Anhui Province's regional test, two annual per mu yield 606.9kg (per mu yield can reach more than 800kg under high-yield culturing condition), 838 volume increase 4.25% more excellent in contrast II; The 132.8 days time of infertility (about the 128 days time of infertility of the Yangtze river basin), 838 precocity more excellent in II 4.7 days; Every total grain panicle number 177.6, ripening rate 86.5%, thousand kernel weight 28.7 grams; Blast resisting composite index 5 grades, bacterial blight-resisting 3 grades, lodging resistance is good; Quality meets third-class edible rice quality standard promulgated by the ministries or commissions of the Central Government.

Floppy disk seedling

Floppy disk seedling standard

Appropriate density, height of seedling is moderate, straight uniform, and every square centimeter has seedling 2-2.5 strain; Height of seedling 15-17 centimetre, contracting angle seedling is no more than 10%; Length of time rice seedlings grow 20-25 days, leaf age 3.8-4.2 leaf; Well developed root system, packing is good, and after planting, root of hair ability is strong.

Seedling material prepares

Plastic floppy disk: long 58 centimetres of floppy disk, wide 28 centimetres, every mu of land for growing field crops needs floppy disk 20.

Bed soil: bed soil require thin, pine, fertile, without grass-seed.

Loosen the soil in nonirrigated farmland (vegetable plot), rice field table soil and the fertilizer become thoroughly decomposed, all can be used as bed soil, should early prepare, and 150 kilograms, bed soil will be prepared enough in every mu of land for growing field crops.

Before seedling, hack is mixed upper part decomposed manure, break into pieces and sieve, every mu of land for growing field crops fine earth 100 kilograms, adds seedling strengthen agent 200 grams, even mix, banks up stand-by.

Plastic film: every mu of land for growing field crops should get out film by the requirement of long 7 meters, wide 1.5 meters.

Small bamboo: calculate by every mu of land for growing field crops, need small bamboo 10.

Straw: calculate by every mu of land for growing field crops, need straw 15 kilograms.

Seedbed makes

Seedbed selection of land: seedbed should select that landform is smooth, physical features is high and dry, irrigation and drainage are convenient, be convenient to the field of transporting.

Rice seedling bed, land for growing field crops ratio: rice seedling bed and land for growing field crops ratio are 1:100.

Seed bed preparation: rice seedling bed wants non watered ploughing water whole, and face, field is smooth.

Seedbed specification: bedside 1.4 meters, furrow width 30 centimetres, encloses ditch depth more than 25 centimetres by dark 20 centimetres.Ensure that water is filled with, row draws.

Sowing

Put floppy disk: 2 seedling dishes are horizontally arranged on seedbed, are connected to each other, close-packed arrays.

Paving soil: in dish, subsoil will spread evenly, the thick 1.5-2.0 centimetre of subsoil.

Sow seeds: seed is evenly sprinkling upon in dish on subsoil, often dish kind of a 80-85 gram, for making seed even, can divide and sow seeds for 2-3 time.

Earth backing: after planting, immediately even earth backing, general thickness 0.5 centimetre, accomplishes not reveal seed.

Pour water: after sowing blinding, start upper water, make Nutrition Soil water suction in dish, reach saturation state; After first-class water, till rice seedling bed water is put into semlsulcus, so that regulate rice seedling bed humidity, be conducive to Miao Qimiao complete.

Put bamboo pole: after planting on seedbed, put 1 small bamboo (long 1.4 meters) every 7-8 cun, in case card is close to by mulch film, cause the rotten bud of anoxic.

Epiphragma: after bamboo pole sets, covers plastic film immediately, and surrounding compresses.

Lid grass: cover straw on film, reach shade, lower the temperature, moisture-keeping function.

Young plants management

Before Guan Shui: 1 leaf 1 heart, keep flat ditch-water, make the moistening non-whitening of card, regulate aqueous vapor, in order to packing; 2-3 leaf duty to be had a ride on a horse water, transplant first 5 days hardenings of cutting off the water.

Take off film: Qi Miaohou (broadcasting rear 5-6 days) 1 leaf 1 heart takes off film.

Topdress: take off film hardening after 1 day, impose wean in conjunction with upper water fertile, mu executes 6 kilograms, urea, sprinkles water immediately after fertilising, with unburned seedling; Within first 5 days, impose to send in transplanting and transfer fertilizer, mu executes 8 kilograms, urea.

Transplanting

Wholely

Non watered ploughing is suned the earth which has been ploughed up, tilling depth 3-5 cun, and harrow-like implement for pulverizing soil rake leveling of pouring water after upturned soil is dry, accomplish that native broken mud is rotten, face, field is smooth.

The machine transplanting of rice

Volume seedling, fortune seedling: volume seedling, fortune seedling want careful, must guard against and firmly pull, in order to avoid the deformation fracture of seedling sheet.

Machine on seedling sheet: during upper machine, seedling sheet lies in frame, the level of overlapping dress seedling is too much unsuitable.

Adjustment facility: according to density requirements, the spacing in the rows of rice transplanter and seedling pawl seedling taking amount, adjust to suitable requirement.

Machine transplanting of rice density: every mu of 2.0-2.4 ten thousand cave, every cave plants 5 seedlings, every mu of Basic Seedling 10-12 ten thousand.

Water starch management

Alive-tiller: machine transplanting of rice rice shoot individuality is little, and seedling-protection of should pouring water in time after the machine transplanting of rice, in case sunburn seedling.Accomplish alive of cun water, shallow water is tillered.

Tillering regularity: at tillering regularity, when seedling number reaches spike number seedling (every mu of seedling number 180,000), draining in time will bake field, roasting Tian Yaoxian gently weighs afterwards, and gradation is carried out, and to control ineffective tillering, guarantees that mid-term is surely long.It is shallow that transplanting is planted, and root system is many at upper soll layer, only has field baked, allows root system deeply prick, could pre-lodging-prevention, do not regard as unimportant to this.

Booting blooming stage: fill with deep water

Pustulation period: take intermittent irrigation, remain that field is moistening.Later stage can not cut off the water supply too early, weighs and output in order to avoid affect grain.

Fertilising

Fertilization principle: the principle grasping " front heavy, in steady, rear benefit ", accomplish that early stage is early sent out, mid-term is surely long, and the later stage is de-fertile.

Total fertilization amount: per mu yield paddy 600 kilograms, the field of medium above soil fertility, mu executes purity nitrogen 12-13 kilogram, and the poor field mu of soil fertility executes purity nitrogen 14 kilograms.Nitrogen phosphoris and potassium fertilizer ratio is 1:0.5:0.6.

Fertilizer application: base, tiller, fringe (grain) fertile ratio are 6:3:1.

Base manure: mu executes purity nitrogen 7.5 kilograms (folding 16 kilograms, urea), and collocation phosphorus pentoxide 6.5 kilograms, potassium oxide 7.5 kilograms, is spread on ground before plowing, and ploughs under in soil immediately.

Tillering fertilizer: impose tillering fertilizer in after the machine transplanting of rice 5-7 days, mu executes 9 kilograms, urea.

Fringe (grain) is fertile: falling 2 leaf dew points to the cut phase, drink according to the growth of cereal crop seedlings and execute fringe granulated fertilizer, mu executes urea no more than 2-3 kilogram.

Topdress when should there is no water layer in field and use, wait fertilizer to be adsorbed by soil and go up water again.

Chemical weed control

5-7 days after the machine transplanting of rice, can select open country weed killer herbicide of waiting for a long time to carry out chemical weed control.

Diseases and pests controlling

Common disease and pest mainly contains rice thrips, rice leaf roller, striped rice borer, paddy stem borer, rice fulgorid, banded sclerotial blight, rice blast, false smut, stripe virus disease, bacterial stripe etc., required agricultural chemicals and prevention and controls, with manual to plant paddy rice identical.

Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.

Claims

1. hybrid rice opens the selection of fragrant excellent No. 3, and it is characterized in that: open 08S for female parent with two-line sterile line, S9817 is that male parent carries out hybrid seeding, obtains new varieties and opens fragrant excellent No. 3; It is with two-line sterile line 108S for female parent that described two-line sterile line opens 08S, and restorer bright extensive 63 is hybridized for male parent, the two-line sterile line that the sterility that the continuous screening through 4 years 7 generations obtains is stable; Described S9817 raises rice No. 6 for maternal, is that male parent is hybridized with Zhenhui 084, and warp many generations are selected, Selecting breed and identify forms;

Selection specifically comprises the steps:

(3) nursery period management:

Mu sowing quantity: male parent 0.5kg, maternal 2kg;

Seeding quantity: male parent is 10 kgs/acre, female parent is 15 kgs/acre;

Seedbed management with post seedling: male parent: take the shed that 50cm is high, first three sky does not leak informaton, as too high in fine day temperature of shed, in the appropriate straw cooling of film upper cover, enter bed the 4th day, grass need be gone to leak informaton to the greatest extent, in conjunction with watering, 1 leaf 1 heart connects film hardening, and 1.5 leaves start to post cultivation, 2 leaves are posted and have been planted, and post and plant density 3 × 3 cun, first phase male parent R1 individual plant, cultivation is posted in the two strain of second phase male parent R2, cultivation is posted in whole two strains of rice seedling bed not water conservation, and when posting cultivation, furrow face is anhydrous, furrow ditch full water;

(4) Honda is transplanted:

(5) Honda field management:

(6) prediction of flowering period and adjustment:

(7) heading flowering period management:

(8) During Grain-filling: