Method for culture of new sterile line of rice

Abstract

A method for culturing a novel sterile line of paddy rice is characterized by that the cytoplasm of male sterility line of non-flutinous rice is used as the doner of the cytoplasm for novel sterile line and the photosensitive karyosterile line of non-glutinous rice containing male sterile maintainer gene is used as the maintainer line of novel sterile line. Its advantage is full male sterility in either longer or shorter day condition.

Description

technical field [0001] The invention relates to a method for cultivating a new sterile line of rice. Background technique [0002] In my country, the current method of breeding three-line hybrid japonica rice by outcrossing japonica rice BT-type male sterile line and japonica rice restorer line has been used in production for many years. Japonica rice sterile lines bred with BT-type sterile cytoplasm are called BT-type nuclear-cytoplasmic interaction male sterile lines, such as Dangxuanwan A, 80-4A, etc. bred by breeding units in Anhui Province, and six bred by Jiangsu Province. Qianxin A, Hanfeng A bred in Shanghai, etc.; the common disadvantage of these CMS lines is that the highest daily temperature above 35°C at the earing stage will easily lead to self-fertilization, affect the purity of hybrid seeds, and cause losses to production. [0003] In 1973, Shi Mingsong, the original seed farm of Shahu, Mianyang County, Hubei Province, discovered a new rice sterile resource i...

AI Technical Summary

Problems solved by technology

But there are also serious disadvantages: fertility is easily affected by low temperature, that is, less than 23°C to 24°C, and the risk of seed production increases