云南八倍体割手密资源产量和品质性状相关性和聚类分析

Correlation and Clustering Relationship Analysis of Yunnan Octoploid Clones of Saccharum spontaneum in China on Basis of Yield and Quality Related Traits

为有效评价和利用八倍体割手密资源,选取采自云南的30份八倍体割手密资源,依据6个产量和3个品质相关性状数据,对其性状变异系数、性状间及与海拔纬度相关性和材料间聚类关系进行了分析。结果表明,云南八倍体割手密资源产量性状的遗传变异较品质性状丰富,其中单茎重和叶宽最为丰富;产量相关性状之间呈现明显的正相关,茎径、叶长与海拔和纬度都呈显著负相关,而单茎重仅与纬度呈负相关;品质性状之间也呈明显的正相关,但与海拔和纬度不存在明显的相关性;依据产量和品质性状的DIST遗传距离聚类结果,在产量和品质相关性状上可将所有研究材料分别聚为5个类群和4个类群,其中植株大小、蔗糖分、纤维分对类群的划分影响较大。

In order to obtain the genetic background of octoploid clones of Saccharum spontaneum, 30 clones were evaluated in coefficient of variance, correlation among quantitative traits, elevation and latitude and clustering relationships among clones. The results showed the ge- netic variances of yield related traits were richer than that of the quality related traits, especially for the stalk weight and leaf width. The sig- nificantly positive correlations were found among yield related traits as well as the quality related traits, of which stalk diameter and leaf length performed negative correlation with elevation and latitude, however, stalk weight was negative correlation with latitude. Between qual- ity related traits and elevation or latitude, the correlations were not apparent. Based on DIST genetic distance of yield and quality related traits, two UPGMA dendrogram were formed. According to yield related traits and quality related traits, all clones could be divided into sev- en groups and four groups respectively, which were influenced mainly by plant size, sugar content and fiber content.