Rice breeding method for polymerizing three disease resistance genes

Abstract

The invention discloses a rice breeding method for polymerizing three disease resistance genes. The rice breeding method adopts combination of a molecular marker-assisted selection technology and an anther culture and conventional breeding technology to quickly polymerize a bacterial blight resistance gene Xa23, a rice blast resistance gene Pi-1 and a rice stripe virus resistance gene Stvb-i. The result shows that the disease resistance gene contained by an obtained anther culture material polymerizing the three disease resistance genes can carry out stable heredity and efficiently resist diseases. The rice breeding method creates a batch of new rice germplasm resources with stable resistance and provides a material basis for rice disease resistance and breeding.

Description

technical field [0001] The invention relates to a breeding method and application of rice strains. More specifically, the invention relates to a rice selection method and its application of polymerizing genes for resistance to three diseases. Background technique [0002] Rice is the largest grain crop in my country, and it is also the grain crop with the highest yield per unit area. The perennial planting area is less than 30% of the grain crops, but the output accounts for more than 40% of the total grain output; more than 60% of the population in my country takes rice as the staple food, especially The number of urban and rural residents whose staple food is japonica rice is increasing. Therefore, the development of rice production plays a pivotal role in solving my country's food security supply. [0003] In rice production, diseases are important limiting factors for high and stable rice yields, among which bacterial blight (caused by pathogenic Xanthomonas varietal X...

AI Technical Summary

Problems solved by technology

Conventional breeding has a long cycle, low efficiency, and consumes a lot of manpower and material resources. Direct selection is often used for target traits. However, many agronomic traits are not easy to observe, are easily affected by the environment, and their performance is unstable. Direct selection is difficult.

Traditional rice disease resistance breeding mainly relies on the identification of resistance and the selection of plant phenotype, which requires rich experience and several years or even ten years, and is limited by the availability of suitable pathogen strains and pathogenic conditions. Identification results are likely to cause errors, and even cause the loss of resistance genes, so the selection efficiency is low and the cycle is long

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