Novel three-line method for mechanical production of hybrid rice seeds

Abstract

Disclosed is a three-line method for mechanical production of hybrid rice seeds. The method is characterized in that a rice variety with hull color different from normal hull color (abnormal color) is selected to hybridize with a maintainer line rice variety with normal hull color so as to obtain maintainer line rice seeds with abnormal hull color, and trans-breeding is performed to obtain sterile line rice seeds with abnormal hull color; and that the obtained sterile line rice seeds with abnormal hull color and restorer line rice seeds with normal hull color are mechanically sown in a mixed manner, mechanical pollen shedding is carried out during the blooming stage, hybrid rice seeds with abnormal hull color and restorer line rice seeds with normal hull color obtained by rice selfing are mechanically harvested, and hybrid seeds and restorer line seeds are separated by use of a color sorter. The method of the invention can be applied to hybrid rice seed production.

Description

technical field [0001] The invention belongs to rice breeding, and relates to hybrid rice seed production technology, in particular to a method for mechanized production of three-line hybrid rice seeds. Background technique [0002] The utilization of heterosis in rice (Oryza sativa L.) can be divided into three-line method and two-line method. At present, the heterosis utilization is mainly based on the three-line method. The main way to utilize the heterosis of rice in the three-line method is to cultivate the male sterile line (A), the male sterile maintainer line (B), and the male sterile restorer line (R) (collectively referred to as three lines), so as to achieve strong selection. The purpose of combining advantages. As early as 1958, Kiyoshi Katsuo of Tohoku University in Japan carried out research on male sterile lines for the use of rice heterosis, and found that China's red awn wild rice could cause male sterility in Fujisaka 5. In 1966, Xincheng Changyou of the ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the mechanization of hybrid rice seed production, to overcome the above-mentioned disadvantages of separate planting, artificial powdering, and separate harvesting, low seed production efficiency, high labor intensity, and low seed production quality, and provide three-line method hybridization Rice Mechanized Seed Production Method