Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
권호 표지

Genetic diversity and population structure of rice accessions from South Asia using SSR markers

  • Cui, Hao (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Moe, Kyaw Thu (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Chung, Jong-Wook (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Cho, Young-Il (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Lee, Gi-An (National Agrobiodiversity Center, National Institute of Agricultural Biotechnology, RDA) ;
  • Park, Yong-Jin (Department of Plant Resources, College of Industrial Science, Kongju National University)
  • Received : 2010.03.15
  • Published : 20100300
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Abstract

The population structure of a domesticated species is influenced by the natural history of the populations of its pre-domesticated ancestors, as well as by the breeding system and complexity of breeding practices implemented by humans. In the genetic and population structure analysis of 122 South Asia collections using 29 simple sequence repeat (SSR) markers, 362 alleles were detected, with an average of 12.5 per locus. The average expected heterozygosity and polymorphism information content (PIC) for each SSR locus were 0.74 and 0.72,respectively. The model-based structure analysis revealed the presence of three clusters with the 91.8% (shared > 75%) membership, with 8.2% showing admixture. The genetic distances of Clusters 1-3 were 0.55, 0.56, and 0.68, respectively. Polymorphic information content followed the same trend (Cluster 3 had the highest value and Cluster 1 had smallest value), with genetic distances for each cluster of 0.52, 0.52, and 0.65, respectively. This result could be used for supporting rice breeding programs in South Asia countries.

Keywords

Acknowledgement

Supported by : Rural Development Administration (RDA)

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