Recessive gene xa13 of rice bacterial blight resistance and its allelic dominant gene xa13

Abstract

This invention relates to the plant biological technology area, it concretely relates to the separated clone, function testing and application of the two DNA fragments of the bacterial blight of rice recessive gene xa13 and dominant allele gene xa13. The antiviral allele xa13 gene is the function flow mutant of the dominant gene xa13. The mutant of the dominant gene makes the paddy rice generated the resistance of the bacterial blight. Some DNA fragments of the allele and dominant gene are connected with the extraneous regulated sequence and transferred into the paddy rice by the gene transfer technology bases on the RNA interference, and this can resist the function of the dominant gene in the paddy rice and improve the resistance of the bacterial blight of rice. Otherwise, the allele gene xa13 in the paddy rice is suppressed by the RNA technology, and this can improve the resistance of bacterial blight of rice further.

Description

technical field

[0001] The invention relates to the field of plant biotechnology. It specifically relates to the isolation, cloning, functional verification and application of a rice bacterial blight-resistant recessive gene xa13. The disease resistance recessive gene xa13 is a functionally deficient mutant of its allelic (dominant) gene Xa13. The mutation of the dominant gene Xa13 confers resistance to some bacterial blight in rice. Background technique

[0002] Plants are attacked by various pathogens during their growth. There are many types of plant pathogens, including viruses, bacteria, molds and nematodes. Pathogen invasion of plants leads to two results: (1) the pathogen successfully reproduces in the host plant, causing related diseases; (2) the host plant produces a disease-resistant response, killing the pathogen or preventing its growth. Using resistance gene resources to improve plant disease resistance is the fundamental way to...

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