Preliminary analysis of genetic diversity of local soybean germplasm in Yunnan

Based on prefecture and county levels,Genetic diversity among 582 soybean accessions from Yunnan was analyzed using 12 main phenotypic characters.The result showed that:(i) genetic diversity of local soybean germplasm existed and there was significant difference not only between prefectures but also counties,at the prefectural level,there was abundant diversity in Lincang,Simao and Dali,and the diversity index varied from 1.2631 to 1.3302;however,diversity in Diqing,Wenshang and Kunming varied from 0.4043 to 1.1284.at the county level,diversity index ranged from 0 to 1.2884,the greatest diversity was found in Zhengkan,Lijiang and Mojiang counties;on the contrary,diversity in Tonghai,Gejiu and Qiubei counties was low.(ii)Extensive genetic variability was found for plant height(2.1629),protein content(2.0822),100-seed weight(2.0787),where a little variability was found for growth habit(0.3622),Pubesence(0.5412) and flower color(0.7151).The research indicated that there was abundant genetic diversity and large variation of local soybean germplasm in Yunnan.