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http://dx.doi.org/10.7783/KJMCS.2013.21.3.220

Comparison of Genetic Diversity among Amaranth Accessions from South and Southeast Asia using SSR Markers  

Wang, Xiao Qiang (Department of Plant Resources, College of Industrial Sciences, Kongju National University)
Park, Yong Jin (Legume Bio-Resource Center of Green Manure (LBRCGM), Kongju National University)
Publication Information
Korean Journal of Medicinal Crop Science / v.21, no.3, 2013 , pp. 220-228 More about this Journal
Abstract
This study was conducted to assess the genetic diversity and population structure of 70 amaranth accessions collected from South and Southeast Asia using 14 simple sequence repeat (SSR) markers. In total, 67 alleles were detected, with an average of 4.79 per locus. Rare alleles comprised a large portion (46.3%) of the detected alleles, and 29 unique alleles associated with rice accessions were also discovered. The mean major allele frequency (MAF), genetic diversity (GD) and polymorphic information content (PIC) of the 14 SSR loci were 0.77, 0.36, and 0.34, respectively. A model-based structural analysis revealed the presence of three subpopulations. The genetic relationships revealed by the neighbor-joining tree method were fairly consistent with the structure-based membership assignments for most of the accessions. All 70 accessions showed a clear relationship to each cluster without any admixtures. We observed a relatively low extent of genetic exchange within or among amaranth species from South and Southeast Asia. The genetic diversity results could be used to identify amaranth germplasms and so facilitate their use for crop improvement.
Keywords
Amaranth; Genetic Diversity; Population Structure; SSRs;
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