Phenotypic Identification and Evaluation of Soybean Germplasm Resources in Sichuan Province

In order to effectively utilize soybean germplasm resources in Sichuan Province in China. 216 soybean germplasm were collected. In this research, 12 phenotypic characters of this soybean germplasm resources in Sichuan Province were identified and comprehensively evaluated by correlation analysis, principal component analysis and clustering analysis. Our results showed that the genotypes of soybean collected in Sichuan were rich in genetic diversity. The diversity index of 9 quality traits ranging from 0.043 to 1.596,which was the highest in seed color（1.596） and the lowest in cotyledon color（0.043）. 3 quantitative traits ranging from 2.581 to 2.812, which was the highest in 100-seed weight（2.812）. Principal component analysis showed that the cumulative contribution rate of the six principal component factors was 72.85%. The comprehensive evaluation D value ranging from 0.002 to 0.278. 216 soybean germplasm could be classified into 4 categories by cluster analysis, Cluster I showed the best performance in 100-seed weight（31 germplasms）. The plant height of cluster Ⅱ was the highest（52 germplasms）. Cluster Ⅲ showed the shortest growth period（57 germplasms）. The 100-seed weight and plant height of cluster Ⅳwas low（76 germplasms）. This study can provide a new reference for the utilization of soybean germplasm and breeding.