A method of aggregation breeding using distant hybridization and anther culture technology of Chinese and American rice

Abstract

The invention relates to a pyramiding breeding method utilizing the Sino-US rice distant hybridization and anther culture technology. Hybridization is carried out between rice materials which are very different from each other in genetic backgrounds, complementation of protogene is fast achieved by utilizing the anther culture haploid breeding technology and the pyramiding breeding technology, and the maximization of the heterosis is achieved. The genetic distance between cross parents can be lengthened, and the heterosis is enhanced. The output, the resistance and other favorable characters can be greatly improved either the indica type rice is hybridized with the American rice or the japonica rice is hybridized with the American rice. Complementation between favorable characters at home and abroad can be gradually achieved through the backcross technology and the pyramiding breeding technology. The stability of breeding materials is accelerated through haploid breeding of anther culture. The advantage of high yield per plant can be obtained, and the yield of a whole group is facilitated.

Description

technical field [0001] The present invention relates to a kind of aggregation breeding method utilizing Chinese and American rice distant hybridization and anther cultivation technology, specifically illustrates the hybridization between rice materials with huge differences in genetic background, the utilization of anthers to cultivate haploid breeding technology and aggregation breeding technology, Quickly realize the complementation of advantageous genes. Background technique [0002] Rice is one of the most important food crops in my country, and more than 50% of the population in China takes rice as a staple food. With the development of agricultural production and the continuous improvement of people's living standards, the proportion of rice in food will continue to increase. However, under the premise of limited arable land resources, how to increase the yield of rice per unit area is of great significance to ensure the food security of our country. At present, the y...

AI Technical Summary

Problems solved by technology

[0003] Distant hybridization refers to the hybridization between distantly related species. Although it can improve the heterosis of rice, due to the complexity of its genetic background, the separation of hybrid offspring is crazy, and it is difficult to stabilize, and the breeding selection is difficult. How to improve The breeding effect of distant hybridization, accelerating the stability of offspring is also a problem that needs to be solved

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