部分南瓜品种资源数量分类初步研究

Numerical Taxonamy of Pumpkin

选取25个主要分类性状,对22个南瓜品种进行了数量分类研究。通过Q型聚类分析,综合考虑多个性状,反映出各品种之间的亲缘及演化关系。结果表明:Q型聚类分析得出的树系图,可以明显地将22种南瓜材料归为4类,即美洲南瓜、中国南瓜、印度南瓜和黑籽南瓜,与传统分类学的结果相符;R型聚类分析反映了各性状的信息,揭示了南瓜品种分类的关键,为今后进行性状观察、记载及取舍等提供了定量依据;同时,还探讨了南瓜品种间的亲缘关系。

Quantity classification was made of 22 pumpkin varieties in terms of 25 main classified characteristics. Model Q cluster analysis was used to develop the kinship and evolution relation among these varieties based on various characteristics. According to the tree chart resulted from the Model Q analysis these 22 pumpkin varieties were categorized into 4 groups, i.e. Americas pumpkin, Chinese pumpkin, winter squash, black seed pumpkin, which tallies with the traditional classification result. Model R cluster analysis was made to provide information about characteristics of pumpkins, which is helpful in categorization of pumpkin varieties. The kinship among pumpkin varieties was also discussed.