火龙果种质资源表型性状的遗传多样性分析

Genetic diversity of phenotypic traits in germplasm resources of Hylocereus

对火龙果种质资源遗传多样性进行分析与评价,为火龙果品种资源的创新利用提供基础。以58份火龙果种质资源为研究对象,对其14个质量性状和9个数量性状进行描述和测定,采用变异分析、相关性分析方法,结合多样性指数,对火龙果表型性状进行评价。结果显示,58份种质资源绝大多数性状呈现出变异程度高、类型丰富的特点,质量性状多样性指数为0.234~1.809;9个数量性状变异范围较大,变异系数为11.25%~35.32%,其中Vc含量变异系数最大;各数量性状间大部分存在显著或极显著相关性。说明58个火龙果种质资源间存在真实的遗传差异,遗传多样性丰富。

The genetic diversity of Hylocereus germplasm resources was analyzed and evaluated to provide a scientific basis for the innovative utilization of Hylocereus germplasm resources. 14 qualitative traits and 9 quantitative traits in 58 Hylocereus germplasm were observed and described. The phenotypic traits were evaluated by variation analysis,index of diversity,correlation analysis.The results showed that most of the traits in the 58 tested germplasm had the characteristics of high degree of variation and rich types.The diversity index(H’) of qualitative traits was 0.234-1.809.The variation range of 9 quantitative traits was large,and the coefficient of variation was 11.25%-35.32%,among which the coefficient of variation of Vc content was the largest.The results of correlation analyses showed that most of the quantitative traits had significant or extremely significant correlations.It is indicated that there are real genetic differences among the 58 Hylocereus germplasm resources,and the genetic diversity is rich.