基于 DUS 测试的江西省水稻新品种遗传多样性分析.

Jiangxi Province is a major province of rice breeding and planting in China. With the rapid improvement of rice breeding level, local varieties were constantly replaced by new varieties, resulted in the loss of a large number of excellent genes and the significant reduction of genetic diversity, and the genetic basis was increasingly narrow. The genetic diversity of 256 new rice varieties in Jiangxi Province was analyzed using the DUS test guide characteristics, aiming to understand the genetic diversity of new rice varieties in Jiangxi Province and provided some references for rice germplasm identification, breeding utilization and new variety testing in Jiangxi Province. The coefficient of variation of the 10 quantitative characteristics ranged from 8. 59% to 21. 83%, the Shannon-Wiener genetic diversity index of the 52 tested characteristics ranged from 0. 03 to 2. 10, with an average of 1. 05, and the cluster analysis showed that the material similarity coefficient ranged from 0. 77 to 0. 95. In recent years, the diversity of varieties selected and bred in Jiangxi Province was relatively narrow, and the development of special rice varieties was also insufficient, such as glutinous rice, colored rice and fragrant rice. [ABSTRACT FROM AUTHOR]