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Quick oriented selection and breeding technology for hybrid japonica rice restoration line

A technology for directional breeding and hybrid rice, which is applied in the fields of botanical equipment and methods, applications, and plant genetic improvement, and can solve problems such as low yield, poor low temperature tolerance, and difficulty in developing japonica hybrid rice.

Inactive Publication Date: 2006-10-11
辽宁省稻作研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the restorer lines used in northern japonica hybrid rice are all using restorer genes introduced from indica rice. While introducing restorer genes, some traits that are unfavorable to production in indica rice itself are also introduced, such as low yield, Low temperature resistance is not good, indica and japonica crosses are not strong, etc.
These traits bring difficulties to the development of japonica hybrid rice

Method used

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  • Quick oriented selection and breeding technology for hybrid japonica rice restoration line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Breeding of the japonica restorer line C560: the recurrent parent Liaojing 294 was backcrossed with the sterile line Liao 151A, and the B1F1 offspring were crossed with the restorer line C52. Test cross after crossing, select a strain with strong resilience from the progeny of the test cross, and then cross with Liaojing 294, test cross after planting a large population in this generation, select a line with strong resilience in the test cross, and then cross with Liaojing 294 294 was backcrossed, and after planting a large population and testcrossing with the sterile line, a restorer line C560 similar to the recurrent parent Liaojing 294 was bred.

Embodiment 2

[0015] Breeding of the japonica restorer line C258: the recurrent parent Liaojing 326 was backcrossed with the sterile line Tijin A to cross the offspring of B1F1 with the restorer line C418, and the hybrid offspring was used as the male parent and Liaojing 326 as the female parent Test cross after backcrossing, select a line with strong resilience from the progeny of the test cross, and then cross with Liaojing 326, test cross after planting a large population in this generation, select a line with strong resilience in the test cross, and then cross with Liaojing 326 Japonica 326 was backcrossed and tested with the CMS line after planting a large population, and a restorer line C258 similar to the recurrent parent Liaojing 326 was bred.

Embodiment 3

[0017] Breeding of the japonica restorer line C198: select the recurrent parent Liaojing 263 and the CMS line Liao 151A to backcross to the offspring of B1F1 to cross with the restorer line C52. Test cross after crossing, select a line with strong resilience from the progeny of the test cross, and then cross with Liaojing 263, test cross after planting a large population in this generation, select a line with strong resilience in the test cross, and then cross with Liaojing 263 263 was backcrossed, and after planting a large population and testcrossing with the sterile line, a restorer line C198 similar to the recurrent parent Liaojing 263 was bred.

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Abstract

The invention relates to a technology of fast and directional breeding recovery strain of round-shaped hybrid rice, essentially comprising: leading recovery gene into the intermediate material got in high-yield normal strain breeding process, which can shorten the time for recovery strain breeding, then directional breeding the normal strain through backcross-testcross, finally breeding the new recovery strain possessing most advantage of normal strain. The invention makes use of the intermediate material of normal sterile rice in backcrossing process to breed recovery strain, which provides a new seed source for recovery strain gene, and eliminates artificial emasculation process. The invention provides technological support for yield increase of hybrid round-shaped rice on base of normal round-shaped rice yield.

Description

(1) Technical field [0001] The invention belongs to a breeding method for new varieties of crops, and mainly relates to the idea and implementation technology of rapid directional breeding of japonica hybrid rice restorer lines. (2) Background technology [0002] At present, the restorer lines used in northern japonica hybrid rice are all using restorer genes introduced from indica rice. While introducing restorer genes, some traits that are unfavorable to production in indica rice itself are also introduced, such as low yield, The low temperature resistance is not good, and the indica and japonica crosses are not strong. These traits have brought difficulties to the development of japonica hybrid rice. At the same time, some conventional varieties and lines of japonica rice have the characteristics of high yield, good production traits, and are more popular with rice farmers, but these rice varieties and lines do not have restorer genes. Varieties and crystal lines are us...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 华泽田郝宪彬张忠旭王彦荣李全英
Owner 辽宁省稻作研究所
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