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Genetic Diversity of Canadian Soybean Cultivars and Exotic Germplasm Revealed by Simple Sequence Repeat Markers

^a Plant Gene Resources of Canada, Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Pl., Saskatoon, SK, Canada S7N 0X2
^b Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, K.W. Neatby Building, Ottawa, ON, Canada K1A 0C6

View larger version (16K): [in this window] [in a new window]   Figure 1. Unweighted pair-group methods using arithmetic averages (UPGMA) dendrogram reflecting genetic relationships of 45 Canadian soybean cultivars based on their simple sequence repeat (SSR) dissimilarities. Bootstrap values higher than 50% (out of 1000 replicates) are indicated above the nodes. The label in parenthesis following each cultivar consists of the breeding program and breeding period specified in Table 1. Seven major clusters are also labeled.

View larger version (10K): [in this window] [in a new window]   Figure 2. Plot of the first two principal component scores based on the Euclidean distances converted from the simple matching coefficient matrix of 234 simple sequence repeat (SSR) bands for 82 soybean accessions. These two components accounted for 13.7 and 10.5% of the total SSR variance, respectively. Individual accessions of seven groups were separately labeled, including one Swedish accession.