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Cultivation method for broad spectrum durable rice blast resistant rice

A cultivation method and rice blast resistance technology, which can be applied in the fields of rice cultivation, botanical equipment and methods, biochemical equipment and methods, etc., and can solve problems such as interlocking

Inactive Publication Date: 2009-05-13
CHINA NAT HYBRID RICE R&D CENT QINGHUA SHENZHEN LONGGANG INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And it can solve the problem of homologous resistance and resistance gene linkage with unfavorable genes in the parents of hybrid rice, so as to create excellent germplasm and increase production and income

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1), a. Constructing a maintainer rice blast resistance germplasm gene bank by using the conventional gene bank construction method of the thermosensitive GMS line Xiang 2S with high outcrossing rate and maintenance performance;

[0022] b. The temperature-sensitive GMS line 582134S with high outcrossing rate was bred by pairing Y58S with the high combining ability restorer line R2134, and the conventional gene bank construction method was used to construct the blast resistance germplasm gene bank of the restorer line;

[0023] (2), a. The basic materials for constructing the maintainer germplasm gene bank are selected high-quality germplasm Shen 97B, Qingguai 23, Zhongzao 22, and Yueguangsimiao with strong resistance and combining ability and good comprehensive traits , Jia 705, Sanhuangzhan, T98B, II-32B, Zhenshan 97B, H37B and newly discovered excellent germplasm with strong resistance and combining ability and good comprehensive traits;

[0024] b. The basic materia...

Embodiment 2

[0032] In step (4), there are four rounds of crossover in the population, and the rest are the same as in Example 1.

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PUM

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Abstract

The invention discloses a cultivation method of broad-spectrum durable blast resistance rice, comprising the following steps: 1 a rice-blast resistance germplasm gene bank construction; 2 a basic colony construction; 3 intercross-shuttle selection- intercross; 4 pedigree shuttle high-pressure selection; 5 test cross identification; 6. start-point temperature identification; 7 resistance spectrum measurement, the germplasm material with complete group resistance frequency of above 90% to the known rice blast pathogene is kept to be broad-spectrum durable blast resistance rice. The broad-spectrum durable blast resistance rice is generated using group improvement technique, thus the rice has broad-spectrum persistent rice-blast resistance and copes with new rice-blast physiological strain resistance-gene and solves biparental homologous resistance of hybrid rice and linkage problem of resistance gene and disadvantageous gene, thus the broad-spectrum durable blast resistance rice of good quality can be obtained and both production and income can be increased.

Description

technical field [0001] The invention relates to a method for cultivating broad-spectrum and persistent blast-resistant rice, and belongs to the technical field of breeding methods for new plant varieties. Background technique [0002] Rice is one of the most important food crops in the world, especially in Asia. However, according to statistics, in the 16 years from 1975 to 1990, the global food loss caused by rice blast (Pyticularia oryzae Sace) reached 157 million tons. In China, rice blast is the main rice disease. When rice blast is prevalent, the yield can decrease by 10% to 50%, and some farmlands even fail to harvest. For example, southern China is the hardest-hit area. The crazy rice blast virus hit Guangdong Province in the morning and evening. What's more serious is that the physiology of Magnaporthe grisea is characterized by multiple races. Due to the rapid evolution of races and complex mutations, new disease-resistant drugs often lose their resistance quickly ...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04A01G16/00C12N15/29A01G22/22
Inventor 武小金
Owner CHINA NAT HYBRID RICE R&D CENT QINGHUA SHENZHEN LONGGANG INST
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