Nude hybrid rice and breeding method thereof

A hybrid rice and hybrid breeding technology, applied in the field of bare hybrid rice and its breeding, can solve the problems of long breeding years, time-consuming and labor-intensive, heavy workload, etc., and achieve short cycle, high breeding efficiency, and reduce skin hair. itching effect

Inactive Publication Date: 2012-07-18
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of introducing naked genes into maintainer lines, sterile lines, and restorer lines through traditional hybrid backcrossing methods not only requires a lot of work, but also has a long breeding period. It usually takes 5-7 years to breed naked hybrid rice combinations that can be used in production. Time-consuming, labor-intensive, low-efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] With 400Gy dose of Co 60 550 grams of seeds of the three-line maintainer line "Zhenshan 97B" with a moisture content of 16% were irradiated with γ-rays. Sowing 14 days after irradiation, M 1 14,000 seedlings are planted in dense clusters, and the maturity period is M 2 The seeds are mixed and dried. m 2 Seeds are thinly sown and wait for M 2 When it grows to the five-leaf stage, dissolve the white pigment in water at a concentration of 3%, and spray it on M 2 The rice seedlings are sprayed, and the rice seedlings that are not easy to color are identified by hand again, and the rice seedlings with mutations in nakedness are selected and moved to empty seedbeds for thin planting (Guangzhenshan 97B). The agronomic and flowering traits of all naked mutants were investigated at the heading and flowering stage, and the "Guangzhenshan 97B" mutant with similar agronomic and flowering traits to Zhenshan 97B was selected as "Zhenshan 97 A / Guangzhenshan 97B" Hybrid, Hybrid F...

Embodiment 2

[0022] With 420Gy dose of Co 60 550 grams of seeds of the two-line male sterile line "Guangzhan 63S" with a moisture content of 16% were irradiated with γ-rays. Place 14 days after irradiation for sowing, the sowing period should be arranged so that it can be eared under the temperature condition of fertile period, M 1 14,000 seedlings are planted in dense clusters, and the maturity period is M 2 The seeds are mixed and dried. m 2 Seeds are thinly sown and wait for M 2 When the five-leaf stage is reached, the red pigment is dissolved in water at a concentration of 2%, and sprayed on M 2 The rice seedlings were sprayed, and the rice seedlings that were not easy to color were patted and identified by hand again, and the rice seedlings with mutations in naked body traits were selected and moved to artificial climate chambers for planting (Guangguangzhan 63S). During the heading and flowering stage, the agronomic and flowering traits of all naked mutants were investigated, an...

Embodiment 3

[0024] With 420Gy dose of Co 60 550 g of seeds of the restorer line "R669" with a moisture content of 16% were irradiated with gamma-rays. Sowing 14 days after irradiation, M 1 14,000 seedlings are planted in dense clusters, and the maturity period is M 2 The seeds are mixed and dried. m 2 Seeds are thinly sown and wait for M 2 When it grows to the five-leaf stage, dissolve the white pigment in water at a concentration of 3%, and spray it on M 2 The rice seedlings are sprayed, and the rice seedlings that are not easy to color are identified by touching again with hands, and the rice seedlings with mutations in naked body traits are selected and moved to empty seedbeds for thin planting (light R669). The agronomic and flowering traits of all naked mutants were investigated at the heading and flowering stage, and the excellent mutants with similar agronomic and flowering traits to R669 were selected to obtain "light R669".

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PUM

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Abstract

The invention discloses nude hybrid rice and a breeding method thereof, and belongs to the technical field of the utilization of rice heterosis. The nude hybrid rice can be obtained through mutagenesis according to the characteristics that the nude character of rice is controlled by a pair of recessive genes. A maintainer line (B line), a two-line sterile line (S line) and a restorer line (R line) of hybrid rice which has excellent performance on the production is subjected to direct irradiation mutagenesis to obtain nude gene mutants corresponding to the maintainer line, the two-line sterile line and the restorer line of the hybrid rice. A nude maintainer line 'nude B' is hybridized and backcrossed with a corresponding A line to obtain a nude sterile line 'nude A' with the nude character. The 'nude A' can be assembled with 'nude R' to obtain nude three-line hybrid rice; and 'nude S' can be assembled with the 'nude R' to obtain nude two-line hybrid rice. The nude hybrid rice is high in photosynthetic efficiency, and is easy to manually harvest, mechanically harvest and thresh; and the characteristics of increasing the storage capacity of the rice, reducing working dust and the like ensure that the nude hybrid rice has relatively strong market competitiveness.

Description

technical field [0001] The invention specifically relates to a naked hybrid rice and a breeding method thereof, and belongs to the technical field of rice heterosis utilization. Background technique [0002] Leaf hairs are a unique structure of plant leaf epidermis. The morphology and mechanical properties of plant leaf hairs directly or indirectly affect many aspects of plant physiology and ecology. People call the whole rice plants such as blades, stems, leaf sheaths and grains in cultivated rice all smooth and hairless types called "light body rice", also known as "light leaf rice" and "light husk rice". Naked rice can reduce skin itching and skin damage during manual harvesting and threshing, and naked rice is also of great value in increasing rice storage capacity and reducing dust from mechanized harvesting and factory processing. At present, naked rice varieties have initially been paid attention to and promoted in my country. Naked rice is a valuable germplasm reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/06A01H1/02A01H1/04
Inventor 章清杞黄荣华陈幼玉
Owner FUJIAN AGRI & FORESTRY UNIV
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