CN104663422B - A kind of producing method for seed of hybrid rice - Google Patents

Abstract

The invention discloses the producing method for seed of a kind of hybrid rice.Method includes following step: (1) is that photo-thermo-sensitive genic male sterile line extensively selects S to be maternal by high-quality two, hands over wide-congenial restoring line the most extensive 499 to be male parent from the Xian round-grained rice of parent's convergent cross selection-breeding；(2) seedling: male parent uses two sections of seedling, and the 1st period of length of time rice seedlings grow controls within 7d, and the 1st and the 2nd phase 13cm × 13cm individual plant posts cultivation, cultivation is posted in the double strain of the 3rd phase 13cm × 10cm；Maternal water-raised seedling, uses Medicament soaked seed, light seeding, even broadcasts, and cultivates short shape seedling, maternal transplants length of time rice seedlings grow 22d, plants team complete before 6.0 leaves；(3) specification is planted: seed farm railway carriage or compartment wide 2.0～2.1m, every railway carriage or compartment parental is planted by 1:12～14；(4) rich water quality management；(5) prediction of flowering period and adjustment: flower chance standard is the Parent heading same period or female early father 1～2d heading, strives that Parent is contained flower and met；(6) anti-miscellaneous.

Description

A kind of producing method for seed of hybrid rice

Technical field:

The present invention relates to the producing method for seed of a kind of hybrid rice, belong to agricultural technology field.

Background technology:

Hybrid rice is produced by different seed rice phase mutual crosses, and dependence is maternal and it Two objects, i.e. " three are " (sterile line, holding system and restorer).To plant on producing One piece of breeding field and one piece of seed farm, breeding field plantation sterile line and holding system, when they are all opened The when of flower, system is kept to send pollen to sterile line by means of media such as wind, worm, water, birds, It is solid that sterile line obtains normal pollen, and the offspring of generation remains sterile line, reaches to breed sterile It it is purpose.The male-sterile seed that breeding can be come by we, retains and continues breeding a part of coming year, Another part is then with the restorer production of hybrid seeds, when the sterile line of seed farm and restorer are all bloomed Waiting, the pollen of restorer sends sterile line to, the offspring that sterile line produces, it is simply that provide land for growing field crops The hybrid rice seed of plantation.

Existing hybrid paddy rice mainly solves a difficult problem for high yield, but generally there is asking of rice quality difference Topic.Along with the living standard of people improves day by day, meal of having enough can not meet the need of consumer Asking, therefore selection-breeding high-quality rice variety is brought into schedule, becomes current rice science men's One research focus.And conventional rice quality preferably but yields poorly, the most not only high yield but also high-quality were Conventional Rice and existing hybrid rice breeding all open questions.

Summary of the invention:

The present invention seeks to, be used for making up the deficiencies in the prior art, and a kind of hybrid rice is provided Producing method for seed.

To achieve these goals, technical scheme is as follows:

A kind of producing method for seed of hybrid rice, including following step:

(1) the maternal and selection of male parent: be that photo-thermo-sensitive genic male sterile line extensively selects the S to be by high-quality two Female parent, hands over wide-congenial restoring line the most extensive 499 to be male parent from the Xian round-grained rice of parent's convergent cross selection-breeding；

(2) seedling: male parent uses two sections of seedling, and the 1st period of length of time rice seedlings grow controls within 7d, the 1 and the 2nd phase 13cm × 13cm individual plant posts cultivation, and cultivation is posted in the double strain of the 3rd phase 13cm × 10cm, Strive for during field-transplanting individual plant band tiller 8～10；Male parent late May or early June plant； Maternal water-raised seedling, land for growing field crops sowing quantity 30～34kg/hm2, rice seedling bed application rate 150～225kg/hm2, use Medicament soaked seed, light seeding, even broadcast, cultivate short shape seedling, maternal move Transplant seedlings 22d in age, plants team complete before 6.0 leaves；

(3) planting specification: seed farm railway carriage or compartment wide 2.0～2.1m, every railway carriage or compartment parental is by 1: 12～14 plant；In male parent row, 3 phase male parents are planted by 3:4:3 is alternate, spacing in the rows 17cm, with Maternal line-spacing 17cm；Maternal Planting Densities 13cm × 13～15cm, double originally plant；

(4) rich water quality management: land for growing field crops require use sufficient base manure, topdress in time, male parent transplant after 5～7d Deep placement ball is fertile in time, and Guan Shui accomplishes that shallow water promotees tiller, and interval puts field, Seedling foot dry field, enters children After Jointing stage, field cun water booting is grown flower, and later stage dry and wet strengthens seed, when female parent total Seedling number reaches Plan to start to put field during the 80% of spike number, terminate to the ear differentiation III phase；

(5) prediction of flowering period and adjustment: flower chance standard is the Parent heading same period or female early father 1～2d Heading, strives that Parent is contained flower and met, and the method such as is looked into carried out by leaf age comparison and children's fringe stripping Prediction of flowering period, it is judged that standard be the early stage Parent same period or maternal the most early, balanced growth until Heading；

(6) anti-miscellaneous: strictly isolating, spatial separation is not less than 500m, and the time is isolated in More than 20d, not in the glutinous rice zone production of hybrid seeds, yellow maturity is gathered in, and dries in time and raises only, it is ensured that seed Color and luster, germination percentage, moisture and cleanliness are up to standard, prevent mechanical admixture.

The producing method for seed of described a kind of hybrid rice, the medicament used in described step (2) For strong chlorine oil.

The producing method for seed of described a kind of hybrid rice, step (4) is applied fertilizer expect N, P, K usage ratio is 2.0:1.0:1.5,

The producing method for seed of described a kind of hybrid rice, female parent extensively select S see fringe 5%, 20%, When 50%, spraying " 92 O " 3 times, ratio is 1:3:2, Parent with spray, total consumption with 330～375g/hm2 are advisable, and set up rational fringe Rotating fields.

Beneficial effects of the present invention is as follows:

The rice per mu yield 588.39kg-599.1kg that the producing method for seed of the present invention obtains, plant type pine Dissipate moderate, the big grain of big fringe, stem stalk is sturdy, leaf color pale green, and sword-like leave is slightly reported, sheath, auricle, Pulvinus, stigma, grain husk point colourless, tillering ability is medium, grows delicate and pretty, yielding ability, yield stability and Later stage annesl is good, fertilizer resistance anti-lodging.And after testing, Coarse Rice Rate 80.8%, polished rice rate 72.9%, Head milled rice 534%, grain length 6.8mm, length-width ratio 3.0, chalk rice rate 30%, chalkiness degree 2.5%, Transparency 2 grades, caustic SCC 5.2 grades, gel consistence 82mm, amylose 15.0%, protein Ground content 8.7%；Bacterial leaf-blight shows as disease-resistant (3 grades), and rice blast resists (5 in showing as Level).

Detailed description of the invention:

For the technological means making the present invention realize, creation characteristic, reach purpose and be prone to effect Understand and understand, below in conjunction with specific embodiment, the present invention is expanded on further.

Embodiment 1

A kind of producing method for seed of hybrid rice, including following step:

(1) the maternal selection with male parent: female parent extensively selects S Fertility al-teration sensitive period, and (children's fringe divides Change III～the VII phase) continuous 3d daily mean temperature can not occur less than 230C and day minimum gas The temperature microthermal climate less than 200C.The In Middle And Lower Reaches of Changjiang River production of hybrid seeds is arranged in August at heading stage Within 12nd～18, it is advisable.In the area production of hybrid seeds of south, Anhui, male parent arranges the sowing of 3 phases, the 1st April phase Sowing on the 26th, each issue interval 7～8d；Seed production florescence is advisable with female parent early male parent 1～2d, father Maternal sowing gap stage 32 ± 1d, leaf differs from 7.3 ± 0.1 leaves, and maternal date of seeding primarily determined that in May 31 days to June 1, concrete depending on male parent growing state.；

(2) seedling: male parent uses two sections of seedling, and the 1st period of length of time rice seedlings grow controls within 7d, the 1 and the 2nd phase 13cm × 13cm individual plant posts cultivation, and cultivation is posted in the double strain of the 3rd phase 13cm × 10cm, Strive for during field-transplanting individual plant band tiller 8～10；Male parent late May or early June plant； Maternal water-raised seedling, land for growing field crops sowing quantity 30～34kg/hm2, rice seedling bed application rate 150～225kg/hm2, use Medicament soaked seed, light seeding, even broadcast, cultivate short shape seedling, maternal move Transplant seedlings 22d in age, plants team complete before 6.0 leaves；Rice seedling bed attention control rice thrips, Lissorhoptrus oryzophilus Kuschel With snout moths larva etc..

(3) planting specification: seed farm railway carriage or compartment wide 2.0～2.1m, every railway carriage or compartment parental is by 1: 12～14 plant；In male parent row, 3 phase male parents are planted by 3:4:3 is alternate, spacing in the rows 17cm, with Maternal line-spacing 17cm；Maternal Planting Densities 13cm × 13～15cm, double originally plant；

(4) rich water quality management: land for growing field crops requires to use sufficient base manure, topdresses in time, takes the circumstances into consideration to execute fringe granulated fertilizer, N, P, K usage ratio is 2.0:1.0:1.5, notes the use of micro-fertilizer and fertilizer simultaneously. After male parent is transplanted, 5～7d timely deep placement balls are fertile.Guan Shui accomplishes that shallow water promotees tiller, and interval puts field, Seedling Foot dry field.Entering ear differentiation after date field cun water booting to grow flower, later stage dry and wet strengthens seed.Weight Point is done a good job of it and is put field mid-term, adhere to Seedling arrive when not waiting, time to the principle of the Seedling such as not.When female parent is total When Seedling number reaches plan spike number 80%, (or before 10 leaves) start to put field, to ear differentiation III Phase terminates；

(5) prediction of flowering period and adjustment: flower chance standard is the Parent heading same period or female early father 1～2d Heading, strives that Parent is contained flower and met, and the method such as is looked into carried out by leaf age comparison and children's fringe stripping Prediction of flowering period, it is judged that standard be the early stage Parent same period or maternal the most early, balanced growth until Heading；

(6) spray " 92 O " improve outcrossing seed-setting rate: female parent extensively select S see fringe 5%, 20%, 50% time, spray " 92 O " 3 times, ratio is 1:3:2, Parent with spray, always Consumption is advisable with 330～375g/hm2, sets up rational fringe Rotating fields.Female parent can appropriateness scotch Leaf or do not cut leaf, cleaning female parent is pollinated obstacle.Adhering to grows flower with " 92 O " protects flower, protects Hold maternal stigma vigour.The most manually catch up with powder on male parent loose powder peak, catch up with powder 3～4 times every day.

(7) anti-miscellaneous: strictly isolating, spatial separation is not less than 500m, and the time is isolated in More than 20d, not in the glutinous rice zone production of hybrid seeds.Improve cultivation management level, cultivate regularity high Many and big spike type female parent colony, suppresses the little tiller of a tardy high position to produce.Strict roguing, in time Remove the different kind in field and variant, it is desirable to the full field of male parent is without hybrid strain, and maternal hybrid strain rate controls Below 0.05%.Yellow maturity is gathered in, dry in time raise clean, it is ensured that seed color and luster, germination percentage, Moisture and cleanliness are up to standard, prevent mechanical admixture.

The ultimate principle of the present invention and principal character and the present invention excellent has more than been shown and described Point.Skilled person will appreciate that of the industry, the present invention is not restricted to the described embodiments, on State the principle that the present invention is simply described described in embodiment and description, without departing from the present invention On the premise of spirit and scope, the present invention also has various changes and modifications, and these change and change Enter to both fall within scope of the claimed invention.Claimed scope is by appended power Profit claim and equivalent thereof define.

Claims (1)

1. the producing method for seed of a hybrid rice, it is characterised in that include following step:

(1) the maternal and selection of male parent: be that photo-thermo-sensitive genic male sterile line extensively selects the S to be by high-quality two Female parent, hands over wide-congenial restoring line the most extensive 499 to be male parent from the Xian round-grained rice of parent's convergent cross selection-breeding；

(2) seedling: male parent uses two sections of seedling, and the 1st period of length of time rice seedlings grow controls within 7d, the 1 and the 2nd phase 13cm × 13cm individual plant posts cultivation, and cultivation is posted in the double strain of the 3rd phase 13cm × 10cm, Strive for during field-transplanting individual plant band tiller 8～10；Male parent late May or early June plant；

Maternal water-raised seedling, land for growing field crops sowing quantity 30～34kg/hm², rice seedling bed application rate 150～225kg/hm², use the seed soaking of medicament strong chlorine oil, light seeding, even broadcast, cultivate short shape seedling, Maternal transplanting length of time rice seedlings grow 22d, plants team before 6.0 leaves complete；

(3) planting specification: seed farm railway carriage or compartment wide 2.0～2.1m, every railway carriage or compartment parental is by 1: 12～14 plant；In male parent row, 3 phase male parents are planted by 3:4:3 is alternate, spacing in the rows 17cm, with Maternal line-spacing 17cm；Maternal Planting Densities 13cm × 13～15cm, double originally plant；

(4) rich water quality management: land for growing field crops require use sufficient base manure, topdress in time, male parent transplant after 5～7d Deep placement ball is fertile in time, and material N, P, K usage ratio of being applied fertilizer is 2.0:1.0:1.5；Guan Shui Accomplishing that shallow water promotees tiller, interval puts field, Seedling foot dry field, enters ear differentiation after date field cun water Booting is grown flower, and later stage dry and wet strengthens seed, opens when female parent total Seedling number reaches plan spike number 80% Begin to put field, terminate to the ear differentiation III phase；

(5) prediction of flowering period and adjustment: flower chance standard is the Parent heading same period or female early father 1～2d Heading, strives that Parent is contained flower and met, and is spent by leaf age comparison and children's fringe stripping checking method Phase is predicted, it is judged that standard is the early stage Parent same period or maternal slightly morning, and balanced growth is until taking out Fringe；Meanwhile, when female parent extensively selects S to see fringe 5%, 20%, 50%, " 92 O " 3 is sprayed Secondary, ratio is 1:3:2, and Parent is with spray, and total consumption is with 330～375g/hm²It is advisable, builds Vertical rational fringe Rotating fields；

(6) anti-miscellaneous: strictly isolating, spatial separation is not less than 500m, and the time is isolated in More than 20d, not in the glutinous rice zone production of hybrid seeds, yellow maturity is gathered in, and dries in time and raises only, it is ensured that seed Color and luster, germination percentage, moisture and cleanliness are up to standard, prevent mechanical admixture.