Breeding method of new variety of high-quality Jingqing japonica rice

Abstract

A breeding method of a new variety of high-quality Jingqing japonica rice comprises the following steps: (1) selecting an early-maturing multi-resistance japonica rice variety as a male parent and a high-yield japonica rice variety as a female parent, and hybridizing to obtain F1-generation seeds; (2) performing continuous multi-generation planting on the F1-generation seeds, performing molecular marker detection on the F3-generation single-plant seedling stage, selecting strains polymerizing wx-mp, pita and pikm genes for planting, screening the strains by taking the heading stage and the maturing rate as indexes for harvesting and planting, and repeating for 2-4 times. According to the method, a traditional breeding method and a molecular breeding technology are combined, the requirements that the problems that precocity and excellent rice quality restrict each other and the excellent quality and variety stress resistance are difficult to coexist in rice variety breeding are efficiently solved from early low generations, and the method has the advantage of being high in success rate.

Description

technical field [0001] The invention belongs to the technical field of rice variety breeding, and in particular relates to a method for breeding new varieties of high-quality National Day japonica rice. Background technique [0002] Rice is the main food crop in China, and its total rice production ranks among the top in the world. In addition, China is also the world's largest rice consumer, with more than 60 percent of the population relying on rice as a staple food. For a long time, the primary indicator of rice breeding is high yield. With the improvement of living standards, people's demand for high-quality rice is increasing day by day. It has become a new wind vane for rice variety research and breeding. [0003] An excellent national day rice variety not only requires early maturity, good appearance and quality, good taste and taste, but also high temperature resistance and strong resistance. When the national day rice is selected according to the traditional bree...

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Problems solved by technology

[0005] In view of the above-mentioned existing problems, the purpose of the present invention is to provide a method for breeding new varieties of high-quality National Day japonica rice, combined with traditional breeding methods and molecular breeding techniques, to efficiently solve the problems encountered in rice variety breeding from the early low generation. Requirements for the mutual restriction between early maturity and good quality of rice, and the difficult coexistence of good quality and stress resistance of varieties, and has the advantage of high success rate

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