应用亲缘系数分析四川小麦种质资源的遗传多样性

对代表四川小麦优良种质的40个小麦品种进行了亲缘系数分析，探讨遗传多样性，结果表明，约60％品种组合间的COP值为0，所有供试品种COP值变异范围为0．00－0．75，平均值仅为0．08，表明大多数品种在系谱上的遗传关系很小或无遗传关系，通过COP聚类分析将供试材料聚为6个类群，2个引进品种各自聚为一个类群，其余38个品种分别以繁6，阿勃，绵阳11号，成都光头4个优势亲本聚为不同的大类群与亚类群，分析认为，供试品种间系谱上的遗传差异较大，遗传多样性较高，文中对不同育种单位及不同时期小麦遗传多样性进行了分析。

Genetic Diversity of Sichuan Wheat Germplasm Based on Coefficient of Parentage

The genetic diversity among 40 wheat cultivars was investigated based on pedigree information. These cultivars represented excellent breeding germplasm in Sichuan during the past 50 years. Coefficient of parentage(COP) analysis showed that the COP values varied from 0 to 0.75, with an average of 0.08. About sixty percent of the COP values were 0. It indicated that there was little genetic relationship between those pairs of cultivars. Clustering of cultivars based on COP matrix resulted in a total of 6 groups. Two imported cultivars were separated into 2 groups and the remained 38 cultivars were classified into 4 groups based on several predominant parents, such as Chengduguangtou, Fan 6 and Abo. It showed that there was high genetic diversity in Sichuan wheat cultivars. The genetic diversity of cultivars from different breeding institutes and different time periods were also studied in the paper.