糯玉米自交系的遗传距离分析及类群鉴定

应用多元统计分析法对50个糯玉米自交系的18个性状的表型平均值标准化,然后进行协方差分析和遗传相关分析,得到7个主成分因子,按主成分因子评价糯玉米自交系的优劣,并按照50个糯玉米自交系间的遗传距离进行聚类分析,得到7大类群。结果表明,糯玉米自交系间遗传距离大小与其表型差异、地理差异、亲缘关系并无必然联系,进行杂交育种时,亲本的选配和杂种优势的预测应以亲本间遗传距离大小作为重要依据。

Analysis on Genetic Distance and Classification Identification of Glutinous Maize Inbred Lines

The standardization in expression type average value on eighteen characters of fifty glutinous maize inbred lines were studied by using multitudinous statistical analysis.Seven principal component factors were obtained by covariance analysis and genetic correlation analysis.The advantage and shortcoming were evaluated according to principal component factors.Distance of fifty glutinous maize was studied and seven groups were obtained by cluster analysis of genetic distance among fifty glutinous maize inbred lines.The results showed that genetic distance of maize inbred lines did not have absolute relation to expression type,geography difference and affinity relation.The genetic distance should be the important basis on which parents and heterosis are selected when we carry out cross-breeding.