Breeding method of a high-quality fragrance-type three-line CMS line i6a

Abstract

The invention discloses a method for breeding a high-quality scent-type three-line CMS line I6A. The female parent is Dxiang 1B, and Jin 23B is the male parent. After three generations of systematic breeding, the breeding A fragrant single plant with excellent plant type, excellent comprehensive traits, and resistance to rice blast was then carried out with Gang 46A for multiple generations of continuous backcrossing. During the backcrossing process, microscopic examination and selection were performed generation by generation. Select a single plant that is completely aborted with fertility, and whose plant type is basically the same as the male parent, and backcross with the male parent, double selection, shorten the breeding period, and finally select and breed stable fertility, good rice quality, high yield of breeding and production, and all kinds of rice. The three-line aroma CMS line with good resistance, strong heterosis and good comprehensive traits was named as the high-quality aroma three-line CMS line I6A. The combination rice prepared by the invention has high quality and high yield, truly realizes the organic combination of high quality and high yield, and solves the problem of high yield but not high quality of hybrid rice in rice breeding.

Description

technical field [0001] The invention belongs to the technical field of rice breeding, and in particular relates to a method for breeding a high-quality aromatic three-line sterile line I6A. Background technique [0002] Since the realization of three-line hybrid rice matching in 1973, it has been widely promoted across the country in 1976. China's rice production has continued to reach new levels, resulting in huge social and economic benefits. New CMS lines are constantly emerging, such as Zhenshan 97A, Dshan A, Gang 46A, Xieqingzao A, Ⅱ-32A, V20A, etc. These CMS lines have played a huge role in rice production. Because the rice quality of these sterile lines is poor, and has been used in production for many years, it is easy to be infected with the main diseases in production, and the yield of the assembled rice varieties is in a lingering situation. High-yield rice varieties often have poor rice quality, and good rice quality varieties have low yield. In order to solve t...

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Problems solved by technology

[0005] In view of this, the present invention provides a high-quality fragrant three-line rice for the problems of poor rice quality, aging, lingering yield of the first generation of three-line male sterile lines, and unsafe fertility of two-line male sterile lines in Sichuan. Breeding method of CMS line I6A, the high-quality fragrance-type three-line CMS line has high quality, excellent resistance, excellent plant type, and environmental friendliness

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