66个广西审定丝苗品种农艺和品质性状多样性鉴定与聚类分析

66 Approved Simiao Type Varieties in Guangxi Province

为了明确广西审定水稻丝苗品种的农艺和品质性状差异与趋同程度,选用2017—2023年广西审定的66个丝苗品种为材料,对18个主要农艺和品质性状进行鉴定、表型多样性分析和品种间聚类分析。结果表明,这66个品种农艺性状表型和品质性状多样性丰富;基于农艺性状表型和品质性状的品种间欧氏距离聚类,可分为5类,包含29个品种的类群农艺性状表型和品质性状表现趋同,此类群包含两系杂交稻品种、三系杂交稻品种和常规稻品种;两系杂交稻品种表型多样性最高,分布于各个类群中,常规稻最低,基本被聚在同一大类中。类群间农艺性状表型和品质性状差异明显,具有相同母本或相同父本的品种基本聚归同类,品种间欧氏距离短。育种组配间会出现亲缘关系较远、农艺和品质性状接近的趋同情况。结果可为广西丝苗型水稻品种的组配选育和推广应用提供理论支持。

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.