关键词: 水稻, 品种, 农艺性状, 多样性, 聚类分析, 广西

Abstract:

In order to clarify the agronomic traits and quality traits differences and degree of convergence of approved Simiao type varieties in Guangxi, 66 Simiao varieties approved in Guangxi from 2017 to 2023 were selected as materials to identify 18 main agronomic traits and quality traits, analyze phenotypic diversity, and perform cluster analysis among varieties. The results showed that these 66 varieties had abundant phenotypic diversity in agronomic traits and quality traits. Based on the Euclidean distance clustering of agronomic trait phenotypes and quality traits between varieties, it can be divided into 5 categories, the group I including 29 varieties with similar agronomic trait phenotypes and quality traits. This group includes two-line varieties, three-line varieties, and conventional rice varieties; the two line hybrid rice varieties have the highest phenotypic diversity and are distributed in various groups, while conventional rice varieties having the lowest phenotypic diversity and being basically clustered in the same major group. There are significant phenotypic differences in agronomic traits and quality traits between groups, and varieties with the same maternal or paternal parents are basically clustered into the same species, with short Euclidean distances between varieties. There can be a convergence of distant genetic relationships and similar agronomic traits and quality traits among breeding groups. The results can provide theoretical support for the combination breeding and promotion application of Guangxi Simiao type varieties.

Key words: rice, cultivar, agronomic traits, diversity, cluster analysis, Guangxi