Rice breeding method

Abstract

The invention provides a rice breeding method. Synchronous induced identification of rice blast and rice black-streaked dwarf virus is realized. The rice breeding method comprises the following steps: inducing the rice blast by using MingShui scented rice; attracting laodelphax striatellus to suck and propagate the rice black-streaked dwarf virus by using fragrant blood glutinous rice 2315; selecting and breeding group seeds and performing mixed-breeding and mixed-planting with the MingShui scented rice; after bacteria inoculation and virus inoculation are induced, performing field selection and indoor identification, and finally, selecting a single spike which meets a breeding target and performing generation-adding to form a high-quality high-yield rice blast-resistant and rice black-streaked dwarf virus-resistant new variety. According to the method, the breeding of the high-quality high-yield rice blast-resistant and rice black-streaked dwarf virus-resistant new variety can be accelerated, the disadvantages that the rice appearance quality of a variety which is popularized in current production is relatively poor, and the resistance to the rice blast and the resistance to the rice black-streaked dwarf virus are weak are overcome, so that the quality and the commodity characteristic of rice are improved, the using amount of a pesticide can also be reduced, environment pollution is reduced, the economic benefit is improved, and meanwhile, the requirements on green sustainable development industries which are espoused at present are met.

Description

technical field [0001] The invention relates to a rice breeding method, in particular to a breeding method for cultivating a new rice line (species) with high quality and high yield resistant to rice blast and black-streaked dwarf disease, belonging to the technical field of crop genetic breeding. Background technique [0002] In recent years, rice blast and rice black-streaked dwarf disease have been increasing year by year in the japonica rice region of Huanghuai, which has a serious impact on yield. Rice blast is one of the most devastating rice diseases caused by the fungus Magnaporthegrisea (Hebert) Barr, especially the occurrence of ear neck blast (commonly known as "neck blast") in the middle and late stages, which can cause large-scale yield reduction or even complete harvest. Shuixiangdao, Xinfeng No. 2 and Yujing No. 6 are all highly sensitive varieties. Rice black-streaked dwarf virus (RBSDV) is a vicious rice virus disease transmitted by Laodephax striatellus Fa...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rice breeding method aimed at the deficiencies of the prior art, which can accelerate the cultivation of high-quality, high-yield and resistant rice blast and black-streaked dwarf rice varieties, and make up for the poor appearance quality of popular varieties in current production. The shortcomings of weak resistance to rice blast and rice black-streaked dwarf disease can improve the quality and commerciality of rice, reduce the use of pesticides, and reduce environmental pollution. While improving economic benefits, it is also in line with the current advocacy Green sustainable development industry requirements

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