|Carter Jr, Thomas|
Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/1/1998
Publication Date: N/A
Technical Abstract: Utilization of modern cultivars developed in other countries from potentially distinct gene pools could be a successful strategy to improve the rate of yield improvement in U.S. cultivars. The objectives of this research were to characterize the genetic diversity among selected North American, Chinese, and Japanese cultivars and identify specific pairs of cultivars that are genetically most dissimilar. Each cultivar was characterized utilizing 121 RFLP loci selected for uniform coverage of the soybean genome, 48 SSR loci with at least one locus on each of the 20 linkage groups, and 35 selected RAPD primers that produced 220 scorable fragments. The soybean cultivars characterized included 66 modern North American cultivars (MG 000-VIII), 59 modern Chinese cultivars (MG 000-IV), and 30 modern Japanese cultivars (MG 0-VII). Soybean breeding in China and Japan predates North American breeding and most of these Asian cultivars have no North American cultivars as parents. Average genetic diversity will be determined for each major gene pool. Genetic distances between pairs of genotypes to be used to select parents for cultivar development.