丝瓜种质资源主成分与聚类分析

对60份丝瓜种质资源的植株、果实等16个农艺性状进行主成分分析和聚类分析。结果表明,60份丝瓜种质资源变异系数范围在0~111%;多样性信息指数在0~2.037。各个材料之间的变异系数和多样性指数各不相同,但总体上60份丝瓜的变异程度和多样性较高。通过主成分分析,提取出5个农艺性状的指标。判断有棱丝瓜和普通丝瓜的因子、果肉因子、果形因子、熟性因子、外观品质因子。根据种质间遗传聚类丝瓜分为有棱丝瓜和普通丝瓜两大类。

Principal Components and Cluster Analyses on Luffa Germplasms

Principal agronomic components of the plants and fruits of 60 varieties of luffa were analyzed.A cluster analysis was conducted on the composition and morphological traits of the vegetables.The results showed coefficient of variations among them ranged from 0％ to 111％;and,Shannon's information,from 0 to 2.037.Overall,their variation coefficients and diversity indices were high and distinctively different from one another.The principal component analysis showed 5 indices to largely cover all agronomic traits that could distinguish between Luffa acutangula (L.) Roxb and L.cylindrica (L.) M.J.Roem.They included the flesh,shape,maturity,and appearance of the fruits.Morphologically,the germplasms were clustered into two groups,with Luffa acutangula in one and L.cylindrica in the other.