Qualitative trait analysis of newly collected wild soybean germplasm in Guangxi.

[Objective]The present experiment was conducted to explore the genetic diversity characteristics in newly collected wild soybean germplasm from Guangxi in order to utilize their outstanding traits. [Method]Two hundred accessions of wild soybean collected from Sep. to Oct., 2008 were planted and eleven qualitative traits, viz., fuzz color, leaf shape, stem type, seed color, etc were investigated. The Shannon-weaver and Simpson genetic diversity index were calculated. [Result]The results indicated that the Shannon-weaver and Simpson genetic diversity index of 11 qualitative traits in wild soybean was 0.0338-0.4320 and 0.0300-0.5811, respectively. The Shannon-weaver index of the seed sootiness and the Simpson index of the seed color were the lowest, while the two indexes of pod color were the highest. Cluster analysis showed that two hundred accessions of wild soybean could be divided into 2 categories. There existed significant genetic difference among the materials collected from different areas, and those collected from same area also showed significant genetic differentiation. [Conclusion]The genetic diversity index of qualitative traits of wild soybean resources in Guangxi was lower, which suggested that the collection and identification of the wild soybean germplasm in Guangxi should be intensified.