Cultivation method of aromatic high-quality rice sterile line

Abstract

The invention discloses a cultivation method of an aromatic high-quality rice sterile line. A restorer line with Yunnan japonica rice gene and other different restorer lines are selected to conduct hybridization, a sterile plant is screened out from F2 generation, the sterile plant and the restorer line are test crossed, and the aromatic high-quality rice sterile line is obtained through backcrossing conservation breeding. According to the cultivation method of the aromatic high-quality rice sterile line, the rice variety with the Yunnan japonica rice gene or the restorer line is taken as a parent to conduct cross breeding with a hybrid rice restorer line with good characters, and the sterile plant in progeny is screened out from the F2 generation; by means of the method of the backcross, a rice sterile line which is high in sterile degree, good in restorability, good in character and stable in inheritance is bred. By means of the cultivation method of the aromatic high-quality rice sterile line, the restorer line with the Yunnan japonica rice gene is required by the sterile cytoplasm parent, a container line has big ears and big grains, sterile line sterile degree of transform breeding reaches to over 99.5%, percentage of chalky rice of the bred sterile line is within 10%, and the fragrance is achieved.

Description

technical field

[0001] The invention relates to a method for cultivating fragrant and high-quality rice sterile lines, belonging to the field of rice breeding. Background technique

[0002] Rice is the food crop with the largest sowing area, the largest total output, the highest per unit area yield, the widest consumer group, and the largest consumption in China. It is responsible for ensuring my country's food security. my country's hybrid rice accounts for half of the total rice area, and its output accounts for more than 60% of the total rice output. Hybrid rice uses the heterosis between the sterile line and the restorer line. The key to the success of breeding lies in the innovation and improvement of materials. Throughout the history and current situation of rice breeding in my country, the breakthroughs in dwarf breeding and three-line and two-line hybrid rice all stem from the discovery and application of new germplasm. There are more than 60 different sterile cyto...

Examples

Embodiment Construction

[0030]In order to more clearly understand the purpose, technical solutions and beneficial effects of the present invention, the invention will be further described below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following examples.

[0031] (1) Breeding of 88-type cytoplasm: from "Hui×Hui" F 2 Found a sterile cytoplasm with Yunnan japonica relatives, and kept the species for propagation.

[0032] In 1996, Wanhui 88 with Yunnan japonica relatives introduced from Chongqing Wanxian Institute of Agricultural Sciences (now Chongqing Three Gorges Institute of Agricultural Sciences) was used (recross combination "704 (Yunnan indica and japonica intermediate rice species, partial japonica with awns) / IR1544 / / Wanzhong 3") and self-bred Neihui 92-4, Neihui 94-4, Neihui 94-11 and other high-quality disease-resistant restorer lines were used to prepare reciprocal cross hybrid combinations to breed new restorer lines. In...

technical field

[0001] The invention relates to a method for cultivating fragrant and high-quality rice sterile lines, belonging to the field of rice breeding. Background technique

[0002] Rice is the food crop with the largest sowing area, the largest total output, the highest per unit area yield, the widest consumer group, and the largest consumption in China. It is responsible for ensuring my country's food security. my country's hybrid rice accounts for half of the total rice area, and its output accounts for more than 60% of the total rice output. Hybrid rice uses the heterosis between the sterile line and the restorer line. The key to the success of breeding lies in the innovation and improvement of materials. Throughout the history and current situation of rice breeding in my country, the breakthroughs in dwarf breeding and three-line and two-line hybrid rice all stem from the discovery and application of new germplasm. There are more than 60 different sterile cyto...

Examples

Embodiment Construction

[0030]In order to more clearly understand the purpose, technical solutions and beneficial effects of the present invention, the invention will be further described below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following examples.

[0031] (1) Breeding of 88-type cytoplasm: from "Hui×Hui" F 2 Found a sterile cytoplasm with Yunnan japonica relatives, and kept the species for propagation.

[0032] In 1996, Wanhui 88 with Yunnan japonica relatives introduced from Chongqing Wanxian Institute of Agricultural Sciences (now Chongqing Three Gorges Institute of Agricultural Sciences) was used (recross combination "704 (Yunnan indica and japonica intermediate rice species, partial japonica with awns) / IR1544 / / Wanzhong 3") and self-bred Neihui 92-4, Neihui 94-4, Neihui 94-11 and other high-quality disease-resistant restorer lines were used to prepare reciprocal cross hybrid combinations to breed new restorer lines. In...

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