45个莲瓣兰品种的表型多样性研究

Phenotypic Diversity of 45 Cultivars of Cymbidium tortisepalum

收集45个莲瓣兰(Cymbidium tortisepalum)主栽品种,对29个表型性状进行数据收集。计算性状变异系数,进行主成分分析、相关性分析及聚类分析探究莲瓣兰品种间亲缘关系及遗传差异大小。结果表明:45份材料各性状的变异幅度为10.1%~133.1%,具有丰富的遗传差异;主成分分析结果表明共得到7个特征值大于1的主要成分,累积方差贡献率高达75.461%,其中第一和第二主成分主要代表了花部综合性状;相关性分析结果表明大部分性状都具有相关关系,其中93对性状显著相关,65对性状极显著相关;聚类分析结果表明在欧式遗传距离15时可将45份莲瓣兰分为3个类群。

Forty-five main cultivars of Cymbidium tortisepalum were collected and variable coefficient analysis principal component analysis,correlation analysis,cluster analysis were conducted on 29 phenotypic traits.The genetic relationship and genetic difference between C.tortisepalum cultivars were explored in order to provide scientific reference for genetic breeding of C.tortisepalum germplasm resources.The results showed that the 45 cultivars had rich genetic diversity with the variation range of 10.1%~133.1%.Principal component analysis showed that 7 main components with characteristic values greater than 1 were obtained,and the cumulative variance contribution rate was as high as 75.461%,among which the first and second principal components mainly represented the comprehensive traits of flower parts.The results of correlation analysis showed that most traits were correlated,among which 93 traits were significantly correlated,and 65 traits were significantly correlated.The results of cluster analysis showed that 45 cultivars of C.tortisepalum were divided into 3 groups in Euclidian genetic distance 15,and the same species had a tendency of clustering together.