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Method for comprehensive cultivation of sterile line of three-line hybrid rice

A three-line hybrid rice and sterile line technology, applied in the field of rice breeding, can solve the problems of insufficient aggregation of comprehensive and excellent traits, long age of selective sterile lines, and inability to apply in large areas, so as to improve the vegetative growth period and biological Yield, strong resistance to rice blast, effect of increasing plant height

Inactive Publication Date: 2017-03-22
内江杂交水稻科技开发中心
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for comprehensively cultivating a three-line hybrid rice sterile line, aiming to solve the problem that existing methods for breeding sterile lines have a long lifespan for breeding sterile lines, outstanding single traits, and insufficient aggregation of comprehensive good traits , the problem that it cannot be applied in a large area in production

Method used

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  • Method for comprehensive cultivation of sterile line of three-line hybrid rice
  • Method for comprehensive cultivation of sterile line of three-line hybrid rice
  • Method for comprehensive cultivation of sterile line of three-line hybrid rice

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Neixiang 2A, a high-quality, large-grain, high-combining ability, disease-resistant, fragrant CMS line

[0065] In the winter of 1997, in Lingshui, Hainan, 1523B with excellent comprehensive agronomic traits, good outcrossing habit, disease resistance, and large grain was used as the female parent, and it was crossed with Yixiang 1B, a high-quality and fragrant material. In the summer of 1998, Yixiang 1B was used as the female parent to cross again. In the autumn of 1998, the re-crossing combination F1 was planted in Hainan. In the winter of 1998, an excellent individual plant with high quality, fragrance, and purple leaf edge was selected from the F2 generation and a self-fertile plateau japonica type The cytoplasmic material "88A" (developed by backcrossing the sterile line isolated from the combination F2 of Wanhui 88 / Neihui 92-4 with N7B and other maintainer lines) was test crossed. Since the summer of 1999, from the test cross Abortive plants are selected from the ...

Embodiment 2

[0069] Example 2 Neixiang 5A, a high-quality, large-grain, high-combining ability and disease-resistant scent-type CMS line

[0070] In the winter of 1997, N7B (formerly NJ7B), which was self-fertile with high outcrossing rate, high biological yield, high thousand-grain weight, and strong resistance to rice blast, was used as the female parent in Lingshui, Hainan, and crossed with the high-quality and fragrant Yixiang 1B , F1 was planted in Neijiang in the season of 1998, and F2 was planted in Lingshui, Hainan in the autumn of 1998. A single plant with excellent comprehensive agronomic characteristics, high quality, fragrance, and purple stigma was selected for test crossing with the self-fertile plateau japonica cytoplasmic 88A. In the process of each generation of backcross breeding, the selection of abortion rate and abortion degree, rice quality, disease resistance and stress resistance, recovery and combining ability of the lines are strengthened at the same time, and mult...

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Abstract

The invention discloses a method for comprehensive cultivation of a sterile line of three-line hybrid rice. According to the method for comprehensive cultivation of the sterile line of the three-line hybrid rice, geographical distant breeding parent materials are used for hybridization, four-early synchronous multi-environment directional force breeding technologies and methods are comprehensively used, and the sterile line of the three-line hybrid rice with high thousand seed weight, combining ability and outcrossing rate, good race quality and comprehensive agronomic trait and high blast resistance is cultivated and obtained; and hybridization of high quality breeding parents and hybridization of high quality breeding parents and disease-resistant breeding parents are adopted for achieving synchronous improvement of the quality, the yield and the resistance, and the sterile line of the three-line hybrid rice with prominent target traits and good comprehensive traits is bred. The four-early synchronous multi-environment directional force breeding technologies and methods are comprehensively used, main quality indexes of the bred sterile line reach the third grade of the national standard, and the sterile line smells sweet, the thousand seed weight is 30 grams or above, the blast resistance is high, and the multiplication and seed production yield is high; and multiple hybrid rice combinations passing validation can be prepared.

Description

technical field [0001] The invention belongs to the technical field of rice breeding, in particular to a method for comprehensively cultivating a three-line hybrid rice sterile line. Background technique [0002] Rice is the food crop with the largest sowing area, the largest total output, the highest per unit yield, the widest consumer group, and the largest consumption in my country. It is responsible for ensuring the safety of rations and food security in China. In the 1990s, my country’s hybrid rice production faced two major challenges: stagnant yield and general deviation in rice quality. The three-line CMS lines Zhenshan 97A, V20A, Gang 46A, K17A, and Ⅱ-32A generally have limiting factors such as high chalky rice rate and hard gel consistency, and a few sterile lines such as Feigai A, Zhong 9A, and Jin 23A The system can prepare better varieties of rice quality, but it is far from satisfying the demand of the market and consumers for the quality of rice. Further analy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 陈勇肖培村张仁谢从简孙泽武袁驰黄湘梁永霞李泽铭曾莉郑灵
Owner 内江杂交水稻科技开发中心