摘要
对代表四川小麦优良种质的 4 0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6 0 %品种组合间的COP值为 0 ,所有供试品种COP值变异范围为 0 .0 0～ 0 .75 ,平均值仅为 0 .0 8,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 .
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.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
2002年第2期22-27,共6页
Journal of Nanjing Normal University(Natural Science Edition)
基金
四川省科技厅
教育厅资助项目
