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【目的】研究国外引进野生甜瓜种质资源的遗传多样性和遗传关系,为野生甜瓜种质资源的评价、分类和高效利用提供参考依据。【方法】以国外引进的100份野生甜瓜种质为材料,采集果实性状数据用于分析野生甜瓜种质资源的遗传多样性,另以我国的薄皮甜瓜、厚皮甜瓜、看瓜和野生甜瓜为参照,分析国外引进野生甜瓜与我国甜瓜种质资源之间的亲缘关系。【结果】国外引进野生甜瓜果实的质量性状和数量性状平均多样性指数分别为0.98和1.79,显示出果实的数量性状具有更丰富的多样性;聚类分析表明,在欧氏距离3.0处可将国外引进野生甜瓜种质资源分为野生和半野生2个类群,在半野生类群中又可分为2个亚群,其中亚群ⅰ包含了参照种质薄皮甜瓜,亚群ⅱ则包含了参照种质厚皮甜瓜。【结论】引进的野生甜瓜种质资源具有丰富的遗传多样性,以果实的数量性状最为突出,并可以分为野生和半野生两种类型,呈现出野生甜瓜向栽培甜瓜驯化的聚类结构,暗示这些甜瓜野生种质在栽培甜瓜的起源与驯化过程中起到重要作用。
【Objective】 The objective of this study is to study the genetic diversity and genetic relationship of wild melon germplasm resources imported from abroad, and to provide a reference for the evaluation, classification and efficient utilization of wild melon germplasm resources. 【Method】 100 wild melon germplasms imported from abroad were used as materials to collect the data of fruit traits for analyzing the genetic diversity of wild melon germplasm resources. The other is the melon, melon, melon, With reference to the analysis of the genetic relationship between introduction of wild melon and melon germplasm resources in China. 【Result】 The results showed that the average diversity index of quality traits and quantitative traits of wild melon introduced abroad were 0.98 and 1.79, respectively, which indicated that the quantitative traits of fruits had a richer diversity. Cluster analysis showed that at Euclidean distance 3.0 Introduction of wild melon germplasm resources abroad into wild and semi-wild two groups, in the semi-wild group can be divided into two sub-groups, which subgroup i contains reference germplasm thin-skinned muskmelon, subgroup ⅱ contains a reference Germplasm of muskmelon. 【Conclusion】 The introduction of the wild melon germplasm resources is rich in genetic diversity, the number of fruit is the most prominent, and can be divided into two types of wild and semi-wild, showing the melon wild melon domestication to the cluster structure, Suggesting that these melon wild germplasms play an important role in the origin and domestication of melon.