CN107646669A - A kind of producing method for seed and breeding method of Medium Indica Hybrid Rice combination rice - Google Patents
A kind of producing method for seed and breeding method of Medium Indica Hybrid Rice combination rice Download PDFInfo
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Abstract
The invention discloses the producing method for seed and breeding method of a kind of Medium Indica Hybrid Rice combination rice, its drip irrigation device is to comprise the following steps：Photo-thermo-sensitive genetic male sterile line Y58S is chosen as female parent, the restorer rice R8199 selected using after Yang No.6 rice and R213 hybridization is used as male parent；Using two sections of seedling, pollination cuts off male parent after terminating, dry and raised only after female parent harvests, prevent mechanical admixture, obtain Medium Indica Hybrid Rice combination rice paddy seed, the combination has the characteristics that plant type is preferable, tillering ability is strong, lodging resistance is good compared with strong, later stage green grass or young crops stalk yellow maturity, setting percentage height, stable high yield, meter Zhi Hao, rice mouthfeel, and suitable middle and lower reach of Yangtze River rice region does rice growing in a season.
Description
Technical field
The present invention relates to the rice production of hybrid seeds, the more particularly to a kind of producing method for seed and breeding method of Medium Indica Hybrid Rice combination rice.
Background technology
Rice is the staple food crop in China, the cultivated area of hybrid rice account for the half of China's Monitoring of Paddy Rice Plant Area with
On.Two-line hybrid rice breeding be China original creation the high-tech for being utilized as main contents with Photo-and thermo-sensitive genic sterility, be after
Another great scientific and technical innovation after Three-line Hybrid rice on Genetic and breeding in rice.Compared with Three-line Hybrid rice, two systems
Method hybrid rice has significant superiority：First, sterile line is free with restorer combo, the probability increase of the excellent combination of seed selection；
Second, sterile line one is dual-purpose, under long day hot conditions (summer) can be used for the production of hybrid seeds, (spring, autumn) can under short day cryogenic conditions
For the breeding of itself, it is not necessary to by maintainer (two systems come therefrom).
Therefore two-line hybrid rice breeding can simplify breeding, production of hybrid seeds program, reduce seed production cost；Three be due to light temperature
Quick sterility karyogene heredity is unrelated with cytoplasm, can overcome cytoplasmic negative effect in three line method sterile line；Fourth, it can closely follow
The seed selection paces of conventional Rice, subspecies indica and japonica hybrid advantage frontier is opened up, make rice yield on the basis of existing hybrid rice
Realize more high yield target.
Although hybrid paddy rice mainly solves the problem of problem of high yield, generally existing rice quality difference.With people's
Living standard is increasingly improved, and consumer demand can not be met by having enough to eat, and people increasingly pursue the satisfaction in mouthfeel, miscellaneous
The mouthfeel of rice is handed over increasingly to influence the popularization of hybrid rice.
The content of the invention
First purpose of the present invention is to provide a kind of producing method for seed of Medium Indica Hybrid Rice combination rice, is obtained by experimental study
To the producing method for seed with preferable mouthfeel while hybrid rice high yield is kept, a kind of high yield of seed selection and the good hybridization of mouthfeel
Middle Xian combines rice.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of producing method for seed of Medium Indica Hybrid Rice combination rice, comprises the following steps：
(1) photo-thermo-sensitive genetic male sterile line Y58S is chosen as restorer rice that is maternal, being selected after hybridizing with Yang No.6 rice and R213
R8199 is as male parent；
(2) rice seedling bed applies base manure before male parent is sowed, and male parent uses two sections of seedling, crop field male parent sowing quantity 0.5kg/ mus, rice seedling bed 1
Male parent phase, the ＜ length of time rice seedlings grow 30 days, 2 phase male parents and 1 10 days male parent time differences phase, 1 phase male parent and maternal 15~22 days time differences, 1 phase male parent with
2 phase male parents are transplanted to crop field simultaneously；Crop field female parent sowing quantity 2.5kg/ mus, are transplanted to crop field in the maternal leaf of rice shoot 4~6；
(3) crop field male parent plants row than being 1 with maternal:12, every mu of male parent plants 1700~1900 caves；Maternal every mu is planted
2.5~2.7 ten thousand caves；
(4) crop field carries out top dressing after male parent deep placement top dressing in the ranks, female parent transplanting after male parent transplanting in 5~7 days；
(5) impurity elimination is isolated, when female parent is shown in that fringe accounts for total female parent 8~15%, the 1st time " 920 " of spray, every mu of 6-7 grams of dosage, only
Spray is maternal；Secondary spray the 2nd time " 920 ", every mu of 5-6 grams of dosage, male parent and maternal same spray；In 1 gram " nine of every mu of use of full-bloom stage
20 " female parent is raised flowers 2 times；
(6) pollination cuts off male parent after terminating, and dries and is raised only after female parent harvests, prevents mechanical admixture, obtains Medium Indica Hybrid Rice combination
Rice paddy seed.
By using above-mentioned technical proposal, maternal Y58S leaf morphology is straight and upright, and leaf inward-curl is into tubular, 85 centimetres of plant height
Left and right, stalk is thicker, and fertilizer resistance anti-lodging power is strong, and plant type is loosely；Tillering ability is strong, and the percentage of earbearing tiller is higher, individual plant effective fringe 8-l0, fringe
Big grain is more, and 26 centimetres of spike length, fringe equals total grain number 146, and Spikelet density is diluter, and grain is elongated, length-width ratio 3.4, paddy point with short awns,
25 grams or so of mass of 1000 kernel, its Fertility al-teration origin temp are less than 23.0 DEG C, and in Zhejiang, infertility goes through the phase up to 90 days or so, the sterile phase
Thoroughly, pollen sterility degree is 100%, Hua Shizao to interior infertility, stigma exposing ratio more than 88.9%, general outcrossing seed-setting rate 50%
Left and right, the production of hybrid seeds easily obtain high yield；Xian types in male parent R8199 category, the cm of plant height 118, plant type is elastic moderate, and growth potential is strong,
Stalk is sturdy, and length of blade and width are medium, and bran point is colourless, and fertilizer resistance anti-lodging, tillering ability is stronger, big panicle many grains per panicle, total grain panicle number 170
Grain, 28 grams of mass of 1000 kernel, concentration of blooming, Hua Shizao, heading go through the phase 6-8 days；Seed can be saved by two sections of seedling, is reduced into
This, after two sections of breedings, robust seedling tiller is early, and effective fringe is more, and rice shoot can be promoted precocious, is advantageous to green manure volume increase；Due to male parent
The big Relatively centralized of pollen amount, pollen amount is big, and course of blooming is relatively short, by the design of two phase male parents, can be assisted at the maternal florescence
The florescence of male parent and the contradiction of pollen amount are adjusted, by transplanting simultaneously, the integrated management of male parent can be facilitated, is ensureing two phase male parents
Effect under, reduce working hour；The length of time rice seedlings grow of 1 phase male parent can cause duration from seeding to heading to extend after transplanting late, cause male parent flower occur
Phase is partially slow, influences yield, and the length of time rice seedlings grow of 1 phase male parent was controlled at 30 days, makes the florescence of two phase male parents can be with the florescence phase of female parent
Meet, male parent can supply pollen for a long time during flower of female parent, so as to improve yield；Crop field applies base manure, cultivates more tillers and strengthens seedling
To establish high quality production of hybrid seeds group structure, production of hybrid seeds male parent and female parent rely primarily on stem and low position tiller Cheng Sui, cultivate more tillers and strengthen
Seedling, early growth and quick tiller can be promoted, improve number of productive ear, effectively improve the percentage of earbearing tiller, promote heading neat and consistent, male parent and female parent
Plant and cause the gynoecium in the middle part of female parent to be difficult to pollinate than crossing conference, male parent can improve cost with maternal planting than too small, make
Into waste, by rational close planting, Basic Seedling is participated；According to male parent and maternal feature, based on base fertilizer, it is aided with top dressing,
By scientific rich water quality management, seedling basis is accomplished fluently；By spraying " 920 ", female parent is only sprayed, promotes maternal ear stem to extend, is adjusted
Section pollination posture, is easy to pollinate, and male parent is maternal with spray, improves setting percentage；Finally, by cutting off male parent in time, male parent is avoided certainly
Handing over influences seed purity, is raised only by being dried after harvest, prevents mechanical admixture, obtains Purity rate of seed height, the measured hybridization of matter
Middle Xian combines rice paddy seed；The hybrid rice that photo-thermo-sensitive genetic male sterile line Y58S and restorer rice R8199 combine to obtain has plant type
The spies such as ideal, tillering ability are strong, lodging resistance is good compared with strong, later stage green grass or young crops stalk yellow maturity, setting percentage height, stable high yield, meter Zhi Hao, rice mouthfeel
Point, suitable middle and lower reach of Yangtze River rice region do rice growing in a season.
Preferably, 1 phase male parent Hainan Region sowing time between 20-January 30 January.
By using above-mentioned technical proposal, Hainan Island tropical the northern fringe, belong to tropical monsson climate, the long summer is without winter, Nian Ping
Equal 22~27 DEG C of temperature, the temperature in last ten-days period January is at 23~24 DEG C or so, and year illumination is 1750~2650 hours, and illumination rate is
50%~60%, light temperature is sufficient, and potential photosynthesis is high, and spring has set in Hainan Island early, and quick heating, temperature difference per day is big, annual free of frost, winter temperature
Warm, paddy growth is fast, and the cycle is short, is sowed in late January, the fertility of the temperature just above maternal Y58S in Hainan Region January
Change starting point.
Preferably, 1 phase male parent Zhejiang area sowing time between 20-May 30 May.
By using above-mentioned technical proposal, Zhejiang is located at subtropical monsoon climate district, and summer is by Pacific Ocean subtropical high
Control, based on southeaster, ocean provides abundant aqueous vapor, and with the humid air, illumination is more, and heat enriches, abundant rainfall, suitably
Paddy growth, last ten-days period sowing in may, now Zhejiang area enters summer, and temperature rises to more than 23 DEG C, just above female parent
Y58S Fertility al-teration starting point.
Preferably, 20.0-23.3 centimetres of spacing in the rows in step (3) between single file male parent, male parent and maternal line space 27-
30 centimetres；Spacing in the rows density between female parent is 16.7 centimetres of 13.3 cm x.
By using above-mentioned technical proposal, the spacing in the rows of single file male parent is closely unfavorable for male parent growth, the spacing of single file male parent excessively
Too far, then the pollen transmission being unfavorable between male parent and female parent, influences to pollinate；Density between same female parent is too small, is unfavorable for
Female parent growth, and the density between female parent is excessive, then is unfavorable for female parent and receives pollen, influences to pollinate, by between male parent and female parent
Spacing in the rows and density control respectively in 20.0-23.3 centimetres, 16.7 centimetres of 13.3 cm x, by male parent and maternal line space control
System can be reduced because hypertelorism is to pollination at 27-30 centimetres while ensureing that male parent has enough growing spaces with female parent
Influence, male parent and maternal 27-30 centimetres of line space are bigger can also to facilitate worker to differentiate male parent and female parent, convenient harvesting.
Preferably, the base manure of every mu of application includes 5 kilograms of urea, 20 kilograms of calcium superphosphate, potassium chloride in step (2)
5 kilograms.
By using above-mentioned technical proposal, urea is current nitrogen content highest nitrogenous fertilizer, as a kind of neutral fertilizer, urea
Easy to maintain suitable for various soil and plant, easy to use, the destruction to soil is small；Calcium superphosphate supply plant phosphorus, calcium
Deng element, there is improvement basic soil effect, can be used as base manure, foliage top dressing, foliage spray, be used in mixed way with urea, have solid
Nitrogen acts on, and reduces the loss of nitrogen, can promote the germinateing of plant, long root, branch, solid and ripe；Potassium chloride is rendered as in chemistry
Property, the quick-acting potash fertilizer of physiological phenomenon, base manure, which improves, to be used, in favor of by rainwater or using irrigation water, by chlorion elute to
Soil lower floor, remove or mitigate harm of the chlorion to crop.
Preferably, 3 days after crop field female parent is slotting in step (4) keep water layer between 4-6cm, maternal slotting latter 5-7 days every
Mu imposes 10-15 kilograms of urea, and maternal heading stage keeps water layer between 4-6cm, later stage alternation of wetting and drying.
By using above-mentioned technical proposal, shallow water is kept within 3 days after female parent is inserted, supply female parent can be played in life by imposing urea
Nutrient deficiency in growth process, later stage alternation of wetting and drying, by increasing capacitance it is possible to increase field humidity, improve the percentage of earbearing tiller and outcrossing seed-setting rate.
Preferably, step (5) maternal growing way is prosperous when male parent growing way, " 920 " is being sprayed first 1 day, by maternal sword-like leave
Slice off 1/3.
By using above-mentioned technical proposal, when maternal growing way is excessively prosperous, maternal sword-like leave can block flower spike, influence to award
Powder, sword-like leave is sliced off into 1/3 can avoid sword-like leave from blocking flower spike influence pollination, while can ensure that sword-like leave part is normally metabolized,
Avoid weakening due to cutting leaf the metabolism of paddy growth.
Preferably, involute upright, sharp colourless, the every mu of number of productive ear of grain husk of the sword-like leave of Medium Indica Hybrid Rice combination rice paddy seed is
The fringes of 14-15 ten thousand, plant height are 128-130 centimetres, and spike length is 27-28 centimetres, is 191-192 grains per total grain panicle number, Defined daily doses
For 162-163 grains, setting percentage 85-86%, mass of 1000 kernel is 26-27 grams.
By using above-mentioned technical proposal, the concrete shape performance of the rice paddy seed obtained through male parent and the hybridization of female parent production of hybrid seeds
For proper height, tillering ability compared with it is strong, plant type is compact, involute upright, the leaf color light green color of sword-like leave, growing way are in great numbers, big panicle many grains per panicle, grain
Density is medium, clever point is colourless, occasionally has short awns, and later stage annesl is good, seed holding is medium, lodging resistance is strong, has plant type ideal, tillering ability
By force, the features such as lodging resistance is compared with strong, later stage green grass or young crops stalk yellow maturity, setting percentage height, stable high yield, meter Zhi Hao, good rice mouthfeel, suitable the Changjiang river
Middle and lower reaches rice region does rice growing in a season.
Preferably, the pest and disease damage resistance of Medium Indica Hybrid Rice combination rice paddy seed is average 2.8 grades of leaf pest, and 4.5 grades of fringe pest, fringe
2 grades of pest loss late, composite index 2.8,5.9 grades of bacterial leaf-blight, brown back rice plant hopper are inoculated with 9.0 grades, 1 grade of field.
By using above-mentioned technical proposal, the pest and disease damage resistance of Medium Indica Hybrid Rice combination rice paddy seed is preferable, cultivates simply,
Suitable middle and lower reach of Yangtze River rice region does rice growing in a season.
Second object of the present invention is to provide a kind of breeding method of Medium Indica Hybrid Rice combination rice, a kind of high yield of seed selection and
The good Medium Indica Hybrid Rice combination rice of mouthfeel.
The present invention above-mentioned technical purpose technical scheme is that：
Photo-thermo-sensitive genetic male sterile line Y58S is chosen as restorer rice that is maternal, being selected after hybridizing with Yang No.6 rice and R213
R8199 is as male parent, and Xian is combined in preparing hybrid, obtains double-linear hybrid rice new varieties, names as Y two excellent 8199.
By using above-mentioned technical proposal, combination is with plant type is preferable, tillering ability is strong, lodging resistance is relatively strong, later stage green grass or young crops stalk is yellow
It is ripe, setting percentage is high, stable high yield, meter Zhi Hao, good rice mouthfeel the features such as, suitable middle and lower reach of Yangtze River rice region do one season semilate rice plant
Training.
In summary, the invention has the advantages that：
1st, the present invention prepares the New Combinations of Medium Indica Hybrid Rice being bred as, combination tool by restorer R8199 and two-line sterile line Y58S
Have plant type is preferable, tillering ability is strong, lodging resistance is relatively strong, later stage green grass or young crops stalk yellow maturity, setting percentage height, stable high yield, meter Zhi Hao, rice mouthfeel
The features such as good, suitable middle and lower reach of Yangtze River rice region do rice growing in a season；
2nd, the present invention in the course of cultivation, by beginning sowing in good time, cultivates strong seedling；Rational close planting, more fringe high yields；The rational application of fertilizer, section
Guan Shui is learned, increases Ear weight；Preventing and treating pest and disease damage ensures that the production of hybrid seeds being capable of high yield in time；By isolating impurity elimination, it is ensured that Purity rate of seed
And quality.
Brief description of the drawings
Fig. 1 is the seed selection family tree that Medium Indica Hybrid Rice combines rice.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment one
Male parent and maternal selection and its character
Photo-thermo-sensitive genetic male sterile line Y58S is chosen as maternal；
The restorer rice R8199 that selection Yang No.6 rice obtains with R213 hybrid seedings is as male parent.
Maternal character：The kind category Agronomic traits, duration from seeding to heading 97-76 days, average 80~90 centimetres of plant height,
Plant type is elastic moderate, and leaf color is compared with pale green, and leaf sheath green, bran point bar yellow, column cap white, blade has long, straight, narrow, recessed, thick
Feature, leaf number of the main culm 15-12 leaves；The effective fringe 8-l0 fringes of individual plant, about 26 centimetres of spike length is average per the total floret bears of fringe 150, puts down
Equal 25 grams of mass of 1000 kernel；Sterile plant rate 100%, sterile degree 100%, pollen abortion is thorough, lost with allusion quotation based on, critical temperature of sterility is low
In 23 DEG C；The total exposing ratio 88.9% of column cap, wherein bilateral exposing ratio 59.6%.Outcrossing seed-setting rate 53.9%, broadcast in Wenzhou at the beginning of 6 months
Kind, beginning mid or late August fringe, duration from seeding to heading is 80-85 days, average leaf number of the main culm l4 leaves.
Resistance Identification：3 grades of leaf pest, 3 grades of fringe pest, 5 grades of bacterial leaf-blight.
Paternal character：Xian types in R8199 category, average 115~120 centimetres of plant height, bran point is colourless, average total grain panicle number
170, average 28 grams of mass of 1000 kernel；Bloom concentration, heading goes through the phase 6-8 days；Wenzhou is sowed at the beginning of 6 months by the end of May, duration from seeding to heading 90-95
My god, average leaf number of the main culm l7 leaves.
The selection of trial-production kind ground
The production of hybrid seeds of Hainan Lingshui, male parent use two sections of seedling, and male parent the 1st is sowed between 20 days-January 30 January phase, two phase fathers
10 days this time differences, the 1st phase male parent and the maternal 15-20 days time difference.
Wenzhou production of hybrid seeds, male parent equally use two sections of seedling, are sowed between male parent 20-May 30 May the 1st phase of male parent, two
10 days male parent time differences phase, the 1st phase male parent and maternal 18~22 days time differences.
Ensure no Rice Cropping in 500m around the addressing ground in Hainan Lingshui and Wenzhou.
Production of hybrid seeds process
(1) rice seedling bed uses sufficient base manure prior to seeding, and the base manure of every mu of application includes 5 kilograms of urea, 20 kilograms of calcium superphosphate, chlorination
5 kilograms of potassium；
After (2) 3 days, according to 0.5 kilogram every mu of crop field sowing quantity male parent, maternal 2.5 kilograms weigh enough male parents and female parent, use
After liquid medicine immersion, sowed in rice seedling bed；
(3) when male parent and female parent are in the 2-3 leaf phases, wean fertilizer is imposed, imposes within 3-4 days before cultivation to send and transfers fertilizer, two phase male parents are same
When transplant, male parent between 1 phase copy 25~30 days in transplanting to crop field, in 4~6 leaves transplanted to crop field by female parent；
(4) male parent and maternal row ratio 1 that standard is crop field are transplanted：12, railway carriage or compartment is wide 2 meters, and 1 phase male parent and 2 phase male parents difference single file are planted
Insert, 20.0-23.3 centimetres of spacing in the rows, with maternal 27-30 centimetres of line space, every mu is planted 1800 caves or so, and 2-3 grain paddy is inserted per cave；
Maternal spacing in the rows density is 16.7 centimetres of 13.3 cm x, and every mu is planted 2.6 ten thousand caves or so, and the common 4-5 seedlings of 2 paddy are inserted per cave, are reached
To every mu of Basic Seedling 100,000 or so；
(5) in male parent, in the ranks deep placement imposes male parent after planting, and dressing fertilizer is urea；5-7 days after female parent is slotting, every mu imposes urea
10-15 kilograms, promote early growth and quick tiller；Crop field is maternal to insert the latter 3 days shallow water water layers kept between 4-6cm, and mid-term, which puts field, to be made under water layer
Below 1cm is down to, the middle and later periods applies Honoka fertilizer, and heading stage keeps the shallow water water layer that water layer is returned between 4-6cm, and later stage dry and wet is handed over
Replace, increase field humidity, improve the percentage of earbearing tiller and outcrossing seed-setting rate；
(6) see that fringe 10% or so sprays the 1st time " 920 " in female parent, every mu of 6-7 grams of dosage, only spray maternal；Secondary spray the 2nd time
" 920 ", every mu of 5-6 grams of dosage, Parent is the same as spray；Female parent is raised flowers 2 times with 1 gram for every mu in full-bloom stage；When the maternal phase of appearance
A kind of seedling dense compared with male parent leaf color, seedling gesture is prosperous, spraying " 920 " first 1 day, maternal sword-like leave is sliced off 1/3；
(7) hybrid strain of Parent is removed before female parent is bloomed, after heading, removes different strain before blooming daily in time, pollination terminates
Cut off male parent in time afterwards, prevent mechanical admixture, dry and raised only after harvest, obtain Medium Indica Hybrid Rice combination rice paddy seed, be named as Y two
Excellent 8199.
Breeding Process
Referring to Fig. 1, the female parents of Y two excellent 8199 are Y58S, and male parent is restorer R8199.R8199 systems Hainan of spring in 2005 is to raise rice 6
Number (first extensive 207) hybridize CDR22/, and the autumn in 2005,2006 Nian Chun groups are mixed receives, and the autumn in 2006 begins to orient using individual plant with R213
Continuous selection, spring Other Main Agronomic Characters are basicly stable within 2008, with wide Hunan 24S, Guangzhan 63S be measured combination performance high yield, it is high-quality,
Plant type is good.Spring in 2010 is measured with Y58S, and combination performance breeding time is suitable, and plant type is preferable, tillering ability is strong, setting percentage is high, the later stage
Blue or green stalk yellow maturity, the features such as lodging resistance is preferable, rice is of fine quality, rice mouthfeel is good.
Refer to table one：
Embodiment two
Difference with embodiment one is in Breeding Process step (4), and 1 phase male parent and 2 phase male parents are planted at random after mixing.
Embodiment three
Difference with embodiment one is in Breeding Process step (4), and 1 phase male parent and 2 phase male parents are apart from one another by being planted.
Medium Indica Hybrid Rice combines rice paddy seed characteristic
Other Main Agronomic Characters
Plant height is placed between male parent and female parent, tillering ability is better than male parent and female parent, plant type are compacter compared with male parent and female parent,
Sword-like leave is involute upright, leaf color compared with male parent and maternal shallow big panicle many grains per panicle, that grain density is medium, clever point is colourless, idol has short awns, later stage
Annesl is good, seed holding is medium, lodging resistance is stronger；Average every mu of fringe of number of productive ear 14.8 ten thousand, average 128.5 centimetres of plant height are average
27.3 centimetres of spike length, it is average per total grain panicle number 191.2, average Defined daily doses 162.7, average setting percentage 85.1%, put down
Equal 26.5 grams of mass of 1000 kernel.
Pest and disease damage resistance
Zhejiang area take temperature now be averaged 2.8 grades of leaf pest, 4.5 grades of fringe pest, 2 grades of fringe pest loss late, composite index 2.8, bacterial leaf-blight 5.9
Level, brown back rice plant hopper are inoculated with 9.0 grades, 1 grade of field.
Meter Zhi
Two excellent 8199 meters of Y is of fine quality, and mouthfeel is good.Try rice matter 2 years general performances of leading indicator in Zhejiang provinces and regions：Head rice rate 62.3%,
Length-width ratio 3.3, chalky grain rate 32%, chalkiness degree 5.1%, gel consistence 68mm, amylose content 13.0%.
Yield shows
The miscellaneous screening tests of Zhejiang Province single cropping Xian are participated within 2012,560.4 kilograms of average product, increase production 5% than control two line system,
The miscellaneous area's examinations of Zhejiang Province single cropping Xian in 2013,627 kilograms of average yield per mu, than control two line system volume increase 5.5%.Zhejiang Province in 2014
The miscellaneous area's examinations of single cropping Xian, 579.5 kilograms of average yield per mu, than control two line system volume increase 5.0%.Two 603.2 kilograms of annual per mu yields,
Than control two line system volume increase 5.3%.
The Medium Indica Hybrid Rice combination rice autumn in 2005 of institute's production of hybrid seeds of the present invention, the mixed receipts of 2006 Nian Chun groups, beginning autumn in 2006 adopt
Continuous selection is oriented with individual plant, spring Other Main Agronomic Characters are basicly stable within 2008, and combination performance is measured with wide Hunan 24S, Guangzhan 63S
High yield, high-quality, plant type is good.Spring in 2010 is measured with Y58S, and combination performance breeding time is suitable, and plant type is preferable, tillering ability is strong, solid
Rate height, later stage green grass or young crops stalk yellow maturity, the features such as lodging resistance is preferable, rice is of fine quality, rice mouthfeel is good.
This specific embodiment is only explanation of the invention, and it is not limitation of the present invention, people in the art
Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this
All protected in the right of invention by Patent Law.
Claims (10)
1. a kind of producing method for seed of Medium Indica Hybrid Rice combination rice, it is characterised in that comprise the following steps：
（1）Photo-thermo-sensitive genetic male sterile line Y58S is chosen as restorer rice that is maternal, being selected after hybridizing with Yang No.6 rice and R213
R8199 is as male parent；
（2）Rice seedling bed applies base manure before male parent is sowed, and male parent uses two sections of seedling, crop field male parent sowing quantity 0.5kg/ mus, rice seedling bed 1
Male parent phase, the ＜ length of time rice seedlings grow 30 days, 2 phase male parents and 1 10 days male parent time differences phase, 1 phase male parent and maternal 15 ~ 22 days time differences, 1 phase male parent and 2
Phase male parent is transplanted to crop field simultaneously；Crop field female parent sowing quantity 2.5kg/ mus, are transplanted to crop field in the maternal leaf of rice shoot 4 ~ 6；
（3）Crop field male parent plants row than being 1 with maternal:12, every mu of male parent plants 1700 ~ 1900 caves；Maternal every mu is planted 2.5
~ 2.7 ten thousand caves；
（4）Crop field carries out top dressing after male parent deep placement top dressing in the ranks, female parent transplanting after male parent transplanting in 5 ~ 7 days；
（5）Isolate impurity elimination, when female parent is shown in that fringe accounts for total female parent 8 ~ 15%, sprays the 1st time " 920 ", every mu of 6-7 grams of dosage, only spray
It is maternal；Secondary spray the 2nd time " 920 ", every mu of 5-6 grams of dosage, male parent and maternal same spray；In 1 gram " 92 of every mu of use of full-bloom stage
Zero " raises flowers 2 times to female parent；
（6）Pollination cuts off male parent after terminating, and dries and is raised only after female parent harvests, prevents mechanical admixture, obtains Medium Indica Hybrid Rice combination
Rice paddy seed.
2. the producing method for seed of a kind of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that 1 phase male parent exists
The sowing time of Hainan Region is between 20-January 30 January.
3. the producing method for seed of a kind of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that 1 phase male parent exists
The sowing time of Zhejiang area is between 20-May 30 May.
A kind of 4. producing method for seed of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that step（3）In
20.0-23.3 centimetres of spacing in the rows between single file male parent, male parent and maternal 27-30 centimetres of line space；Spacing in the rows density between female parent
For 16.7 centimetres of 13.3 cm x.
A kind of 5. producing method for seed of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that step（2）In
The base manure of every mu of application includes 5 kilograms of urea, 20 kilograms of calcium superphosphate, 5 kilograms of potassium chloride.
A kind of 6. producing method for seed of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that step（4）In
Crop field is maternal insert after keep within 3 days water layer between 4-6cm, female parent insert after 5-7 days every mu impose 10-15 kilograms of urea, female parent is taken out
Ear period keeps water layer between 4-6cm, later stage alternation of wetting and drying.
A kind of 7. producing method for seed of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that step（5）It is female
This growing way is prosperous when male parent growing way, is spraying " 920 " first 1 day, maternal sword-like leave is sliced off into 1/3.
A kind of 8. producing method for seed of Medium Indica Hybrid Rice combination rice according to claim 1, it is characterised in that Medium Indica Hybrid Rice group
Involute upright, sharp colourless, the every mu of number of productive ear of grain husk of the sword-like leave of Heshui rice is the fringes of 14-15 ten thousand, and plant height is 128-130 centimetres,
Spike length is 27-28 centimetres, is 191-192 grains per total grain panicle number, and Defined daily doses are 162-163 grains, setting percentage 85-86%, thousand
Grain weight is 26-27 grams.
9. the method for planting of a kind of storage tolerance tomato according to claim 1, it is characterised in that Medium Indica Hybrid Rice combines rice
The pest and disease damage resistance of seed is average 2.8 grades of leaf pest, 4.5 grades of fringe pest, 2 grades of fringe pest loss late, composite index 2.8, bacterial leaf-blight
5.9 grades, brown back rice plant hopper is inoculated with 9.0 grades, 1 grade of field.
10. a kind of breeding method of Medium Indica Hybrid Rice combination rice, it is characterised in that choose photo-thermo-sensitive genetic male sterile line Y58S as female
This, is used as male parent using the restorer rice R8199 that selects after Yang No.6 rice and R213 hybridization, Xian combinations in preparing hybrid, obtains
Double-linear hybrid rice new varieties are obtained, are named as Y two excellent 8199.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109906896A (en) * | 2019-02-28 | 2019-06-21 | 常德市农学会 | A kind of Hybrid Rice is guaranteed the quality high-yield breeding method |
| CN111713399A (en) * | 2020-07-03 | 2020-09-29 | 湖南杂交水稻研究中心 | Method for producing hybrid rice combination by mixed sowing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663422A (en) * | 2015-02-05 | 2015-06-03 | 广德县农业科学研究所 | Hybrid rice seed production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104663422A (en) * | 2015-02-05 | 2015-06-03 | 广德县农业科学研究所 | Hybrid rice seed production method |
Non-Patent Citations (1)
| Title |
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| 浙省稻2016011: "2016年浙江省审定品种-Y两优8199", 《中国水稻信息网》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109906896A (en) * | 2019-02-28 | 2019-06-21 | 常德市农学会 | A kind of Hybrid Rice is guaranteed the quality high-yield breeding method |
| CN111713399A (en) * | 2020-07-03 | 2020-09-29 | 湖南杂交水稻研究中心 | Method for producing hybrid rice combination by mixed sowing |
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