五节芒种质资源的表型多样性分析

为了解中国五节芒的形态多样性和分布特点，为五节芒种质资源的开发和利用提供参考依据，对采集自安徽、福建、广东、广西、贵州、湖北、湖南、江苏、江西、浙江等10个省份117份材料的12个与茎杆、叶片、花序相关的表型性状进行表型多样性分析。结果表明：(1)五节芒群体的表型性状在群体间和群体内都存在丰富的变异，各性状变异系数范围为2.80%～73.43%；(2)主成分分析显示，前3个主成分累积贡献率为87.75%，其中第1主成分反映叶片特征，第2主成分反映茎杆特征，第3主成分反映花序特征；(3)聚类分析表明，10个群体可以分为3类，第1类为湖南和江西2个群体，第2类包括福建、广东、广西、湖北和贵州5个群体，第3类包括安徽、江苏和浙江3个群体。

Study on Phenotypic Diversity Analysis of Miscanthus floridulus

To investigate the diversity and distribution characteristic, and to provide data for efficient utilization and conservation for Miscanthus floridulus (M. floridulus). One hundred and seventeen accessions of M. floridulus, collected from Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangsu, Jiangxi and Zhejiang provinces, were evaluated for their diversity in phenotypic traits. The result of this paper were (1) there were abundant variation in phenotypic traits among populations and within populations, with variation coefficient ranging from 2.80% to 73.43%; (2) the first three principal components explained 87.75% variation and principal component 1 reflected the leaf traits, principal component 2 reflected the stem trait and principal component 3 reflected the inflorescence trait; (3) according to the UPGMA cluster analysis, the populations of M. floridulus in this study could be divided into three groups: group 1 includes Hunan and Jiangxi populations, group 2 includes Fujian, Guangdong, Guangxi, Hubei and Guizhou populations, and group 3 includes Anhui, Jiangsu and Zhejiang populations.