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The Journal of Heredity 1992:83(5):325-329
© 1992 The American Genetic Association 83:325-329

research-article

Genetic Diversity in Natural Populations of Wild Soybean in Iwate Prefecture, Japan

Y. T. Kiang, Y. C. Chiang, and N. Kaizuma

Department of Plant Biology, University of New Hampshire Durham, NH 03824
Department of Zoology, University of New Hampshire Durham, NH 03824
Faculty of Agriculture Iwate University Morioka, Japan

Abstract

To study the genetic structure of wild soybean (Glycine soja Sieb. & Zucc.) populations, seeds were systematically sampled from four natural populations growing along banks of the Kitakami River in Iwate Prefecture, Japan. Fifteen enzymes plus one nonenzyme protein (soybean trypsin inhibitor, Ti) representing 42 loci were examined by gel electrophoresis. We observed 38.1% polymorphism, an average of 1.55 alleles per locus, an average expected heterozygosity of 0.115, and an average gene diversity of 0.112 ± 0.036. The average outcrossing rate of 2.3% is similar to 2.4% estimated in cultivated soybean (G. max(L.) Merr.]. Calculated genetic diversity shows 0.074 and 0.302 between- and within-population diversity, respectively. The coefficient of differentiation among populations is 0.197.


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