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Breeding method of high-quality disease-resistant high-temperature-resistant rice two-line sterile line

A high-temperature resistant rice technology, applied in the field of crop genetics and breeding, can solve the problems that restrict the yield of hybrid rice seed production, seed germination rate and rice quality, affect the safety of two-line rice seed production, and hidden dangers of food safety production, etc., to achieve Effects of improving rice blast resistance, improving seed yield and quality, and improving appearance quality

Active Publication Date: 2015-08-19
FUJIAN KINGSANTO DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the low temperature in summer seriously affects the safety of two-line rice seed production; high temperature conditions restrict the yield and seed germination rate of hybrid rice, as well as the seed setting rate and rice quality of large-scale production of hybrid rice; unfavorable climatic conditions even induce the outbreak of rice blast , leading to the reduction of production and failure of some rice varieties produced on a large scale, which has brought great hidden dangers to my country's food security.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) C10 (represented by variety A), a long-grain type high rice rice rate variety, II-32B (represented by variety B) with high stigma resistance and easy seed production, and Guangkang 13B (represented by variety C) with high blast resistance ) as the parent, as the hybrid combination F A / F B , F A / F C , respectively with F AB , F AC express; plant F AB , F AC , and hybridize F AB / F AC ,, to obtain the first generation of recrossing, with F ABC express; plant F ABC and harvest F ， 2 seed;

[0020] 2) Change the F ， 2 The seeds were planted in the severely affected areas of rice blast in Shanghang tea land, Longyan, Fujian, and the induced variety International Rice 6 was used to induce the disease. The high blast resistance variety Guangkang 13B was used as the control, and the seedlings with the incidence level of leaf blast were selected from 0-1. Transplant and transplant rice seedlings; at the earing wax ripening stage, carry out the identification ...

Embodiment 2

[0031] 1) C10 (represented by variety A), a long-grain type high rice rice rate variety, Gufeng B (represented by variety B) with high stigma resistance, easy seed production and disease resistance, and Guangkang 13B (represented by variety B) with high blast resistance Variety C) is the parent and used as the cross combination F A / F B , F A / F C , respectively with F AB , F AC express; plant F AB , F AC , and hybridize F AB / F AC ,, to obtain the first generation of recrossing, with F ABC express; plant F ABC and harvest F ， 2 seed;

[0032] 2) Change the F ， 2 The seeds were planted in the severely affected areas of rice blast in Shanghang tea land, Longyan, Fujian, and the induced variety International Rice 6 was used to induce the disease. The high blast resistance variety Guangkang 13B was used as the control, and the seedlings with the incidence level of leaf blast were selected from 0-1. Transplant and transplant rice seedlings; at the earing wax ripenin...

Embodiment 3

[0043] 1) The long-grain high rice variety C10 (represented by variety A), the stigma resistant to high temperature and easy seed production maintainer line II-32B (represented by variety B), and the high blast resistance variety Gufeng B (represented by variety C represents) as the parent, as the hybrid combination F A / F B , F A / F C , respectively with F AB , F AC express; plant F AB , F AC , and hybridize F AB / F AC ,, to obtain the first generation of recrossing, with F ABC express; plant F ABC and harvest F ， 2 seed;

[0044] 2) Change the F ， 2 The seeds were planted in the severely affected area of ​​rice blast in Shanghang tea land, Longyan, Fujian, and the induced variety "946" was used to induce the disease. The high blast resistance variety Gufeng B was used as the control, and the seedlings with leaf blast incidence level 0-1 were selected and transplanted. Seedling transplanting; at the earing wax maturity stage, carry out the identification of ear...

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Abstract

The invention relates to a breeding method of a high-quality disease-resistant high-temperature-resistant rice two-line sterile line, and belongs to the technical field of crop genetic breeding. The method is involved in rice germplasm breeding with long grain polymerization, high head rice rate and excellent economical characters such as high seed production temperature resistance and disease resistance, and the rice two-line sterile line with long grains, high head rice rate, high seed production temperature resistance, good out-crossing feature, stable fertility, good disease resistance and excellent comprehensive characters are bred. Great assembling is carried out by utilizing the sterile line, and a novel two-line hybrid rice assembly which is high in quality, disease-resistant and beneficial for seed production is screened out hopefully.

Description

technical field [0001] The invention specifically relates to a method for breeding high-quality, disease-resistant, high-temperature-resistant two-line sterile line germplasm of rice, belonging to the technical field of crop genetics and breeding. Background technique [0002] Rice is one of the main food crops in my country and even in the world, so it is particularly important to increase rice yield. Among them, high yield, high quality and disease resistance are important breeding goals of hybrid rice. The problems existing in the current process of rice heterosis utilization are becoming more and more obvious, concentrated in a series of problems such as small increase in per unit yield, no breakthrough in rice quality and resistance, and high risk in hybrid rice seed production. The weather is becoming more and more frequent, which brings great risks to rice production. For example, the low temperature in summer seriously affects the safety of two-line rice seed produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 万华雄练进旺陈永发官智勤
Owner FUJIAN KINGSANTO DEV CO LTD
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