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Genetic Diversity Patterns in Chinese Soybean Cultivars Based on Coefficient of Parentage

^a Dep. of Crop Science, North Carolina State Univ., Raleigh, NC 27695-7631 USA
^b USDA-ARS and Dep. of Crop Science, North Carolina State Univ., Raleigh, NC 27695-7631 USA

View larger version (35K): [in a new window]   Fig. 1 Plot of coefficient of parentage (CP) relationship among 23 of 25 provinces that released a total of 651 soybean cultivars during 1923 to 1995. Coordinates for a province were obtained from a multidimensional scaling procedure employing two dimensions based on the CP relation in Table 3. Growing regions of China were superimposed upon the graph to clarify geographical interpretation of the analysis (northeastern China, NEC, northern China, NC, and southern China, SC). The CP between any two provinces can be estimated as 0.0985 - linear distance between them, where 0.0985 is the maximum off-diagonal CP value in Table 3. Distances 0.0985 indicate no relationship. (Ningxia and Jiangxi provinces were deleted from the graph because cultivars from these provinces were not related to any other provinces)

View larger version (25K): [in a new window]   Fig. 2 Plot of coefficient of parentage (CP) relationship among 20 clusters (A through T) for 270 soybean cultivars released during 1923 to 1995. Coordinates for a cluster were obtained from a multidimensional scaling procedure employing two dimensions based on the average CP values among the 20 clusters. Growing regions were superimposed upon the graph to clarify geographical interpretation of the analysis and designated as northeastern China (NEC), northern China (NC), and southern China (SC). The CP between any two clusters can be estimated as 0.165 - linear distance between them, where 0.165 is the maximum CP relation between clusters. Distances 0.165 indicate no relationship