浙江省薄皮甜瓜地方品种的表型遗传多样性

利用表型性状探讨了浙江省沿海地区27份薄皮甜瓜地方品种资源的遗传多样性。结果表明48个质量性状遗传多样性指数在0.17–1.98之间；33个数量性状的变异系数在4.56%–83.50%，表明其丰富的遗传多样性。形态学聚类分析表明，在相似系数0.30处可以将27个资源分成两大类，这与按生育期长短分类结果完全一致；亚类的划分与果实形状、种子形状、叶片颜色、果皮颜色、覆纹颜色等质量性状具有一定的相关性，但其划分依据相对独立。本研究结果进一步丰富了甜瓜的评价体系，并为今后优异基因资源的挖掘与利用提供重要依据。

Phenotypic Diversity Analysis of Oriental Melon Landraces of Zhejiang Province

The genetic diversity and phylogenetic relationship of 27 oriental melon landraces of Zhejiang province were investigated by 81 phenotypic traits and cluster analysis. The results showed that Shannon-weaver genetic diversity coefficient of the 48 qualitative traits ranged from 0.17 to 1.98, and the variation coefficient of the 33 quantitative traits varied between 4.56% and 82.5%, implying the abundant genetic diversity. The cluster analysis based on the phenotypic traits indicated that the 27 oriental melon landraces could be divided into two groups at similarity coefficient of 0.30, well in correspondence with the growth period; one the other hand, the divisions of subgroups were independent of each other, but correlated with shape of fruit and seed and color of leaf, pericarp and its coating lines. The results of this study enrich the evaluation system and provide important information for the exploitation and utilization of excellent gene resources of melons.