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Selection method of rice-blast-resistant strong dominant hsien rice restorerlines

A technology of rice blast resistance and rice blast resistance gene, applied in the field of crop genetics and breeding, can solve problems such as narrowness and hidden dangers of rice production safety

Active Publication Date: 2018-11-30
JIANGSU LIXIAHE REGION AGRI RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

In the past 40 years, due to the narrow genetic basis of the parents and the diversity of highly pathogenic Magnaporthe grisea, rice blast has become a major problem in hybrid rice production. The continuous outbreak has brought huge hidden dangers to the safety of rice production in my country

Method used

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  • Selection method of rice-blast-resistant strong dominant hsien rice restorerlines

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Experimental program
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Effect test

Embodiment 1

[0034] 1. Breeding materials

[0035] 1) Take Hua Zhan (parent 1) as the female parent. Huazhan is a blast resistant indica rice restorer line developed by the China National Rice Research Institute. This variety has been applied for and authorized by the Plant New Variety Protection Office of the Ministry of Agriculture. The variety right number is CNA 20080059.0, which can be purchased from the China National Rice Research Institute. This variety is the backbone restorer line of hybrid rice in my country. The hybrid rice prepared has the advantages of high yield, high quality, resistance to rice blast, and wide adaptability.

[0036] 2) Take Fuhui 838 (parent 2) as the male parent. Fuhui 838 is an indica conventional rice variety cultivated by Sichuan Institute of Atomic Energy. Although this variety has not applied for the new variety right to the Plant New Variety Protection Office of the Ministry of Agriculture, it has been widely used as an indica restorer line since it wa...

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Abstract

The invention relates to a selection method of rice-blast-resistant strong dominant hsien rice restorerlines, and belongs to the technical fields of crop genetics and breeding. The selection method ofthe rice-blast-resistant strong dominant hsien rice restorerlines comprises the following steps: taking a rice-blast-resistant hsien rice restorerline parent one (Hua-zhan) with excellent comprehensive agronomic characters, strong dominance and good combining ability as a rice-blast-resistant gene donor parent; taking a non-rice-blast-resistant hsien rice restorerline parent two (Fu-hui 838) withexcellent comprehensive agronomic characters, strong dominance and good combining ability as a receptor parent; carrying out hybridizing; carrying out back-crossing by using the parent one (Hua-zhan)as a recurrent parent; detecting rice-blast-resistant genes, including Pi2, Pi54, Pid3, Pita, Pib and the like, contained in the parent one (Hua-zhan) by utilizing molecular markers; selecting new rice-blast-resistant strong dominant restorerlines by taking agronomic character choice and rice blast resistance identification results into consideration; and then, carrying out matching with different sterility lines so as to select out rice-blast-resistant high-quality high-yield hybrid hsien rice combinations. Thus, rice blast resistance of first hybrid generation can be enhanced so as to meetneeds of current rice production.

Description

Technical field [0001] The invention provides a method for selection and breeding of indica rice restorer lines with strong superiority against rice blast, belonging to the technical field of crop genetic breeding. Background technique [0002] Rice is one of the main food crops in my country and even in the world. High-yield, high-quality and disease resistance are important breeding goals of rice. Hybrid rice, as one of the main ways to increase rice yield, has been widely used and promoted, and has made a great contribution to food safety production. However, recently, due to the fact that the promoted varieties are not resistant to rice blast or resistance degradation, their application in production is limited. Therefore, there is an urgent need to improve the blast resistance of hybrid rice to meet the needs of rice production. The rice blast caused by Magnaportheoryzae is one of the most important fungal diseases that threaten the safety of rice production in the world. T...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 李育红李爱宏吴云雨肖宁戴正元刘广青潘存红周长海余玲黄年生张小祥季红娟王闯王志平吴诗清李响
Owner JIANGSU LIXIAHE REGION AGRI RES INST
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