Good quality flavor, rice blast resistance and high yield japonica rice Zhendao No. 12 breeding method

Abstract

The invention discloses a breeding method of the japonica rice variety Zhendao No.12 characterized in good quality, good taste, rice blast resistance and high production. The rice bred by the method has the advantages of good quality, good taste, high commodity value; excellent disease resistance, good yield stability and fertility, coordinated grain structure, auto-regulation; good plant type and maturation appearance. The breeding method of the invention includes the following steps: (A) selecting the self-selected Zhenxiang 24 of the late-maturing middle japonica rice characterized in early mature period, high production, rice blast resistance and good taste as the female parent, crossbreeding with the strain Zhen 511 characterized in rice blast resistance, good quality and appearance and good taste and obtaining 60 grains of F0 seeds; (B) fry soaking, sprouting and seed sowing of the F0 seeds, multiple crossing with the Wuyujing No. 8 variety with high production but bad quality, self-breeding for eight generations and obtaining the japonica rice characterized in extra quality, good taste, rice blast resistance and high production, that is the Zhendao No.12.

Description

technical field [0001] The invention relates to a plant breeding method, in particular to a breeding method of the high-quality japonica rice Zhendao No. 12, which is resistant to rice blast and high in yield. Background technique [0002] Rice is the largest crop in my country. There are two main subspecies of rice cultivated in China, namely the indica subspecies and the japonica subspecies. The Japonica subspecies is mainly cultivated in Jiangsu, accounting for more than 90% of the rice planting area in Jiangsu. High-yield breeding has always been an important goal of rice breeding. Due to the large population in my country, the area of ​​arable land has decreased year by year, and the pressure on food demand has increased. High-yield breeding has long been given top priority, and research on improving rice quality has lagged behind. In recent years, with the improvement of people's living standards, the adjustment of planting structure and the pressure of international ...

AI Technical Summary

Problems solved by technology

Most of the existing main varieties in Jiangsu are of poor quality, and the resistance to rice blast has also degraded. At the same time, the traditional high-quality japonica rice has small grains, and the thousand-grain weight is generally below 25 grams. Its high-yield performance is limited, and the yield is often not high. , more than 5% lower than the yield of main varieties

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