黄瓜核心种质遗传多样性的苗期和初花期形态标记分析

对92份黄瓜核心种质进行苗期和初花期形态学标记分析,以评价供试核心种质资源的遗传多样性水平。结果表明:供试黄瓜核心种质的苗期和初花期性状存在明显的遗传变异,不同种质间各性状的平均变异系数为31.0%,其中第一雌花节位的变异系数最大,为59.4%;始花期最小,为14.2%。聚类分析表明,在Pearson相关系数为6.5时,把92份黄瓜核心种质划分为3大类群;Pearson相关系数为3.5时,把92份黄瓜核心种质划分为8个类群。本研究结果丰富了黄瓜种质资源的评价体系,为今后优异基因资源的挖掘与利用提供了科学参考。

Genetic Diversity Analysis of Seedingand Early Flowering Stage Morphological Marker in Cucumber Core Germplasm

This study evaluated the level of genetic diversity in 92 accessions of cucumber (Cucumis sativus L.) core germplasm using seedling and early flowering stage morphological markers. The results showed there were significant genetic variations in the seedling and early flowering stage traits of the tested cucumber core germplasm. The average variation coefficient between each germplasm traits was 31.0%. The variation coefficients for the node of the first female flower with 59.4% and the date of flowering with 14.2% were the biggest and the smallest, respectively. Based on the morphological traits, cluster analysis indicated the 92 accessions could be divided into three and eight groups at the Pearson correlation coefficient of 6.5 and 3.5, respectively. The results of the present study enrich the evaluation system and provide important information for the exploitation and utilization of excellent gene resources of melons.