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期 刊 ：植物遗传资源学报 2014年 15卷 4期

关键词：南瓜；地方品种；表型性状；遗传多样性；聚类分析；

Keywords:pumpkins, landraces, phenotypic trait, genetic diversity, cluster analysis,

摘 要 ：利用表型性状探讨了浙江省沿海地区20份南瓜(Cucurbita moschata)地方品种资源的遗传多样性。结果表明36个数量性状的变异系数在7.33%~59.11%，46个质量性状Shannon-weave遗传多样性指数在0~1.99之间，表明其丰富的遗传多样性。农艺性状聚类分析表明，20份资源明显分为2大类，这与传统种分类相一致。在欧氏距离15.0处把其中一类19份资源又分成五小类，划分与花萼片大小、花梗刺毛、瓜形、老瓜皮色等具有一定的相关性，但划分依据相对独立。本研究结果进一步丰富了南瓜的评价体系，并为今后优异基因资源的挖掘与利用提供重要依据。

Abstract:The genetic diversity and phylogenetic relationship of 20 pumpkins landraces of Zhejiang province were investigated by 82 phenotypic traits and cluster analysis. The results showed that the variation coefficient of the 36 quantitative traits varied between 7.33% and 59.11%, and Shannon-weave genetic diversity coefficient of the 46 qualitative traits ranged from 0 to 1.99, implying the abundant genetic diversity. The cluster analysis based on the phenotypic traits indicated that 20 pumpkins landraces were divided into two categories, and this was agreement with the traditional classification. One category of 19 pumpkins landraces could be further divided into five groups at Euclidean distance of 15.0. The divisions were correlated with the size of sepals, pedicel hairy, melon shapes and skins, and the divisions criterion were independent of each other. The results of this study enriched the evaluation system and provided important information for the exploitation and utilization of excellent gene resources of pumpkins.

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