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Genetic Diversity among Soybean Accessions from Three Countries Measured by RAPDs

^a Dep. of Crop Sciences, 1101 W. Peabody Dr., Univ. of Illinois, Urbana, IL 61801
^b USDA-Agricultural Research Service, Soybean/Maize Germplasm, Pathology, and Genetics Research Unit, Dep. of Crop Sciences, 1101 W. Peabody Dr., Univ. of Illinois, Urbana, IL 61801

View larger version (25K): [in a new window]   Fig. 1. Geographical regions of China, Japan, and S. Korea from which the 120 selected soybean accessions originated.

View larger version (30K): [in a new window]   Fig. 2. Distribution of the frequencies of polymorphic RAPD fragments among 120 soybean accessions from China, Japan, and S. Korea.

View larger version (13K): [in a new window]   Fig. 3. Scatterplot based on the first two principal components from a principal components analysis of RAPD fragment data demonstrating the genetic relationships among soybean accessions from China, Japan, and S. Korea. Accessions from Japan and S. Korea are identified only by country but accessions from China are identified by specific province. Observations are coded as follows: K = S. Korea; J = Japan; H = Heilongjiang; N = Henan; B = Hebei; A = Shaanxi; I = Shanxi; U = Jiangsu; S = Shandong; and X = Ningxia.

View larger version (19K): [in a new window]   Fig. 4. Dendrogram derived from the UPGMA procedure using genetic distances generated from the AMOVA program depicting the relationships among soybean populations from regions of China, Japan, and S. Korea. Genetic distances are estimated from RAPD markers.