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Crop Science Abstract - PLANT GENETIC RESOURCES

Genetic Diversity and Population Structure of Korean and Chinese Soybean [Glycine max (L.) Merr.] Accessions

 

This article in CS

  1. Vol. 51 No. 3, p. 1080-1088
     
    Received: July 18, 2010


    * Corresponding author(s): shannong@missouri.edu
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doi:10.2135/cropsci2010.07.0420
  1. Jeong-Dong Leea,
  2. Tri D. Vuongb,
  3. H. Moon,
  4. Ju-Kyung Yue,
  5. R.L. Nelsonf,
  6. Henry T. Nguyenb and
  7. J. Grover Shannon *c
  1. a Division of Plant Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
    b Division of Plant Sciences and National Center for Soybean Biotechnology, University of Missouri-Columbia, MO 65211, USA
    D ep. of Crop Sciences, North Carolina State University, Box 7620 Raleigh, NC 27695, USA
    e Syngenta Seeds Inc., Stanton, MN USA
    f USDA-Agricultural Research Service, Soybean/Maize Germplasm, Pathology, and Genetics Research Unit, Dep. of Crop Sciences, University of Illinois, Urbana, IL 61801 USA
    c Division of Plant Sciences, University of Missouri-Delta Center, Portageville, MO 63873 USA

Abstract

Korean and Chinese cultivated soybean [Glycine max (L.) Merr.] populations are major soybean gene pools. Information has been reported comparing genetic diversity between soybeans from the two countries using an unequal number of accessions and only 6–35 genetic markers. This study compares differences across 49 simple sequence repeat markers covering the 20 soybean chromosomes to assess genetic diversity and genetic relationships among 90 cultivated soybean accessions, each collected over a wide geographical area of Korea and China. Soybean populations from both countries had high genetic diversity indexes (H), but the index was higher for the Chinese population (H = 0.76) than the Korean population (H = 0.72). Soybean accessions collected from central China had the highest genetic diversity value (H = 0.73) compared with accessions from regions of southern and northern China or northern and southern Korea, where H ranged from 0.70 to 0.71. Accessions from Korea showed less molecular variation than accessions from China. Accessions from the two Korean regions grouped closely genetically, but were grouped apart from the Chinese population. STRUCTURE and principal coordinate analysis showed that gene flow occurred between the two countries; however, Korean and Chinese soybean populations were genetically distinct. Therefore, soybean accessions originating from both countries represent unique gene pools for soybean improvement.

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