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以国家果树种质郑州葡萄圃保存的867份栽培种质为材料,对47项表型性状进行了主成分分析。采用欧氏遗传距离、离差平方和法进行种质初选。采用分组和逐步聚类法,分别以15%、20%、25%和30%的比例抽样,依次获得124、170、205和252份种质。通过对初选种质的遗传多样性指数、表型保留比例的分析,检验初级核心群的构建效果。结果表明,按种质类型分组,组内采用平方根策略、15%抽样比例获得的124份初选种质的表型保留比例和遗传多样性代表性均达到96%,表明构建的初级核心群对原始种质具有很好的代表性。
Based on the 867 cultivars collected from the National Fruit Germplasm Zhengzhou Grape Cultivation, the principal component analysis of 47 phenotypic traits was conducted. Euclidean genetic distance, variance sum of squares method for primary selection of germplasm. A total of 124, 170, 205 and 252 germplasm were obtained by using the method of grouping and stepwise clustering respectively in the proportions of 15%, 20%, 25% and 30%. Through the analysis of genetic diversity index and phenotype retention ratio of primary germplasm, the construction effect of primary core population was tested. The results showed that the phenotypic retention percentage and genetic diversity of 124 primary selected germplasms obtained by 15% sampling method were all 96% according to the type of germplasm by square root strategy, indicating that the constructed primary core group The original germplasm is well represented.