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Cold-region japonica hybrid rice restorer and variety breeding method

A hybrid rice and restorer technology, which is applied in the fields of botanical equipment and methods, applications, and plant genetic improvement, can solve problems such as being susceptible to low temperature damage, remaining in the technical exploration stage of hybrid rice, and unable to meet the needs of hybrid rice growth. , to achieve the effect of broad application prospects and increased production

Inactive Publication Date: 2013-08-14
JIANGSU BEIGUOZHICHUN AGRI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, due to the low annual effective accumulated temperature in the cold region of Heilongjiang, and the three critical stages of rice growth (seedling stage, earing stage, and filling stage) are prone to low temperature hazards, breeding research has always believed that the hybrid rice technology research has been carried out. The climate and environment of the region cannot meet the needs of hybrid rice growth, so so far, most of the research on hybrid rice in cold regions has remained at the stage of technical exploration
The results of the novelty search show that there are no restorer lines (R) and sterile lines (A) suitable for cultivation in cold regions, and no hybrid rice varieties with three lines have been released.

Method used

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  • Cold-region japonica hybrid rice restorer and variety breeding method
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  • Cold-region japonica hybrid rice restorer and variety breeding method

Examples

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example 1

[0018] parent source

[0019] Restorer line HP121: The rice Java-type restorer line HP121 was bred by the Rice Research Institute of Anhui Academy of Agricultural Sciences in 1994 through the cross breeding of China PL1 / Duoshou Line 2 / / Wanhui 9.

[0020] Restorer line MR18: The plant was selected from the restorer line LH422 by Fenghe Rice Research Institute of Suqian in 1999 (LH422 was provided by Mr. Luo Xiaohe, Hunan Center for Miscellaneous Excellence).

[0021] Kendao 12: Kendao 12 was bred by the Rice Research Institute of Heilongjiang Academy of Agricultural Sciences by crossing Kendao 10 as the female parent and Kendao 8 as the male parent by pedigree method. The approval number is black rice 2006009. market to buy.

[0022] Salsa mud: a conventional japonica rice variety imported from abroad by Fangzheng County Seed Company of Heilongjiang Province and Suihua Agricultural Science Research Institute of Heilongjiang Academy of Agricultural Sciences, suitable for plant...

example 2

[0059] the breeding process;

[0060] 1. CMS breeding: Beiguo 1A and Beiguo 2A were tested and screened with Aichixiang A, Kendao 12 and Shashani respectively from 2008 to 2010, and then backcrossed 4 times to 4 generations (BC 4 ) to obtain.

[0061] 2. Breeding of japonica hybrid rice restorer lines in cold regions: from 2006 to 2010, Java-type HP121 (China PL / Duoshouxi 2 / / Wanhui 9) was used as female parent, and "Miryang 23" was used as female parent and MR18 was used as the male parent and the progeny of backcrossing with MR18 was used as the male parent, and artificially crossed. After two consecutive generations of systematic breeding, the agronomic traits were screened for excellent single plants planted in cold regions. In the third generation (F 3 ) to identify its cold tolerance; planting and screening to 5 generations (F 5 ), use the transgenic CMS lines Beiguo 1A and Beiguo 2A to test and restore the group, and then plant the tested and matched F in cold regions ...

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Abstract

The invention discloses a cold-region (I, II, III and IV rice accumulated temperature zone of Heilongjiang Province) japonica hybrid rice restorer and variety breeding method. Rice variety resources with cold-resistance restoring genes, namely restorer HP121 and restorer MR 18 are selected, and are planted and subjected to artificial cross, cold resistance is indentified at F3 stage after two continuous stages of system breeding, the screened cold-resistance lines are tested and matched with transformed male sterile lines and then are grown in the cold region F1, cold-resistance restorer is selected according to the representation of F1, and then male sterile lines are tested and matched with the restorer and are grown in the cold region F1, the effectiveness and the adaptability are indentified, and cold-region japonica hybrid rice restorer and variety can be obtained finally. According to the invention, the cold-resistant problem of the cold-region japonica hybrid rice restorer can be solved, three-system matching of the cold-region japonica hybrid rice is realized, the blank of applying japonica hybrid rice technology in the cold region of Heilongjiang Province can be filled, the output of cold-region rice can be greatly improved, and the application prospect is wide.

Description

technical field [0001] The invention relates to a method for breeding restorer lines and varieties of japonica hybrid rice in cold regions. Background technique [0002] Rice in Heilongjiang currently occupies a very important position in my country's grain production. Heilongjiang is a typical cold-region rice-growing region, with an area of ​​about 3.434 million hectares in 2011 2 , compared with 297.3hm in 2010 2 The area increased by about 466,000 hm 2 , and there is an increasing trend year by year. The average output in 2011 was 6.07t / hm 2 About 20.845 million tons of rice are produced in total, 80% of which are commercial grains. At present, the rice planted in Heilongjiang is all conventional varieties, and the yield per unit area is maintained at 6-7t / hm 2 , the bottleneck of its output breakthrough is the limitation of conventional varieties. According to the successful experience of applying rice heterosis in rice-growing areas in southern my country, Heilo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 孙明庆瑢李永祥
Owner JIANGSU BEIGUOZHICHUN AGRI TECH