Comprehensive Evaluation of Main Agronomic Traits of Millet Germplasm Resources Based on Principal Component Analysis and Cluster Analysis
In this study,in order to comprehensively evaluate 92 millet germplasm resources,13 main agronomic traits such as spike weight,spikelet number,grains per spikelet were selected.The millet germplasm resources were comprehensively evaluated using methods such as coefficient of variation,genetic diversity index,cluster analysis.The results showed that the genetic diversity index of 13 main agronomic traits were all above 1.90,The coefficient of variation ranged from 11.79%to 37.75%,There was a correlation among the main agronomic traits of different millet germplasm resources.The spike weight was extremely significantly positively correlated with the spikelet number,grains per spikelet,the grain weight per spike,the length and width of the top second leaves,the length and thickness of the stem,the length and thickness of the main spike,the number of nodes in the main spike,and the one thousand grain weight.It is also significantly positively correlated with the one thousand grain weight.The grain weight per spike was extremely significantly positively correlated with the spike weight,the spikelet number,the grains per spikelet,the width of top second leaves,the length and thickness of the stem,the length and thickness of the main spike,the number of nodes in the main spike,and the one thousand grain weight,and significantly positively correlated with top second leaf length.Cluster analysis showed that 94 materials were divided into 6 groups,among them,the grain weight per spike and one thousand grain weight of Group I(7)and Group V(17)were significantly higher than those of other groups.They could be used as introduction of high-yield varieties or parental materials for hybrid breeding of high-yield millet.Principal component analysis focused 13 agronomic traits on 4 principal components with a cumulative contribution rate of 76.165%,among them,the first principal component was closely related to spike weight and grain weight per spike,with a contribution rate of 37.401%.The second,third,and fourth principal components were related to the ecological construction of millet.In summary,94 millet germplasm resources had significant potential for variation.The comprehensive evaluation showed that 0412-1-2-1,Shanxibai,Lianggu,Dahongpao,Laohuwei,2055fu,Xifuxiao(Yu county),8311,Esiniu,and Xiaozhuyeqing could be used as excellent parental materials for breeding.
万方数据
维普
