Cultivation method of high-grain weight excellent-quality ternary hybrid rice variety

Abstract

The invention relates to a cultivation method of a high-grain weight excellent-quality ternary hybrid rice variety, belonging to the technical field of plant breeding. The cultivation method comprisesthe following steps: using strong excellent-quality restorer line Zhenhui 084 as a male parent and Zhenhui 129 as a female parent for hybridization with groups; after inbred selection, adopting a wide-narrow-row high-fertilizer sparse planting culture mode from an F3 generation to carry out bacterial blight inoculation identification and screen high-grain weight and appearance quality by generations; measuring and combining the F3 generation with II-32A to identify a restoration degree; measuring and combining an F5 generation with an excellent-quality male sterile line Tianfeng A; culturinga strong excellent-quality restorer line 1126 with excellent plant types, disease resistance, high grain weight, high restoration degree and excellent rice quality; and producing hybrid seeds by the excellent-quality male sterile line Tianfeng A and Yanhui 1126 to obtain a new ternary hybrid rice variety 1126 with compact plant types, strong disease resistance, stable high production, high grain weight and high rice quality reaching an international excellent-quality rice level.

Description

1. Technical field [0001] The invention discloses a method for cultivating high-grain weight and high-quality three-line hybrid indica rice varieties, which belongs to the technical field of plant breeding, and more specifically is specially used for breeding new high-grain weight and high-quality three-line hybrid indica rice varieties. 2. Background technology [0002] With the rapid expansion of the world's population, the reduction of the global arable land year by year, the frequent occurrence of natural disasters, and the slowdown of food growth, food security in the new century has become a hot spot that the international community is generally concerned about. The perennial planting area of ​​hybrid rice in my country accounts for about half of the rice planting area. The breeding and application of hybrid rice in my country has made important contributions to the grain production of my country and the world. The main way to increase the total grain output, especiall...

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Problems solved by technology

[0003] After years of research by domestic and foreign counterparts, it has been concluded that increasing grain weight is an important way to increase the yield of hybrid indica rice varieties. Currently, high-grain weight hybrid rice varieties such as "II You 42" and "II You 838" are used in production, although the yield is relatively low. High, but there are defects that the quality is not good, that is, it does not meet the national standard of high-quality rice

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