Research on the Prediction of Soybean Parental Heterosis with the Genetic Distance of SSR Marker

[Objective] The possibility of the prediction of the soybean parent heterosis with the technique of SSR molecular marker was explored through the analysis of soybean parental genetic distance.[Method] The soybean cultivars at home and abroad and their hybrids being used as the materials and the genetic distance among parents and their heterosis were calculated and the specific combining ability and the heterosis were analyzed.[Result] According to the correlation analysis,although the correlation coefficient between parent and their heterosis was small,the difference between the genetic distance of parent and the heterosis in the plant height and the content of protein was very significant(at 0.01) and between the genetic distance of parent and the number of pod,grain and grain weight per plant,and the diameter of stem was significant at 0.05 level,which was negative correlation.[Conclusion] There was a certain correlation between the genetic distance of parental and some traits,but a lot of work needed to be done in the application of the technique.