Fig. 1. Dendogram of 190 soybean lines produced by UPGMA clustering method based on the genetic similarity matrix derived from 332 AFLP markers. The letter and the numbers after the plus sign (+) in the cultivar names are codes from Table 1. A- = North American soybean ancestor; U- = North American soybean cultivar; Us- = Southern USA cultivar; C- = Chinese cultivar; J- = Japanese cultivar.