Variation of Agronomic Traits and Production of Germplasm Resources of Soybean in Different Years and the Relationship Between Them
Agronomic traits and production of 249 soybean germplasms were investigated under field condition for 2 years,and multi-statistics analysis was then applied to analysis the results. The results showed that the coefficient of variation ( CV) of germplasm of soybean based on agronomic characters and production were 6. 2% -78. 0% and 6. 3% - 48. 5% , respectively. CV for growth period was small because of the similar ecotype of the germplasm resources in the area of Huang-Huai-Hai plain. CV for stem nodes number was also small. CVs for plant height,effective branch number,bottom pods height,the pods number per plant,grain number of single plant,number of seeds per pod, grain weight per plant, 100-seed weight and yield per unit area were large. Agronomic traits and production were significantly different between cultivars. Effects of ecological factors (including temperature, precipitation and sunshine hours) of different years on agronomic characters and production of soybean were large. Agronomic traits between different years were also significantly different. Agronomic traits could be simplified for 4 independent indexes correlating with production by using principal component analysis in 2 years. Furthermore, it could be quantified the relationship between agronomic characters and production according to establish set of equation Y = 17. 5 - 1. 76x, +1.32x2 +0. 3Ox3 + 2. 50x4 and Y = 198. 8-3. 12x, +7. 71x2+0. 08x3 + 2. 71 x4 in 2 years between them. The characters of all type cultivars in 2 years were analyzed by using the method of cluster analysis for 5 types, respectively, to provide theoretical basis for breeding new soybean cultivars of high and stable yield and regulation of cultivation measures for high yield.
SoybeanPrincipal components analysis ( PC A )Cluster AnalysisGermplasm resourcesProductionAgronomic traits
NETL
NSTL
万方数据
维普
