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HEREDITAS ›› 2010, Vol. 32 ›› Issue (2): 163-169.doi: 10.3724/SP.J.1005.2010.00163

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Genetic diversity of different geographical populations of Oxya chinensis based on AFLP analysis

MA Jin1, LI Tao1, LONG Wen-Min1, AN Wei-Wei1, GUO Ya-Ping1, MA En-Bo2   

  1. 1. School of Life Science and Technology, Shanxi University, Taiyuan 030006, China; 2. Institute of Applied Biology, Shanxi University, Taiyuan 030006, China
  • Received:2009-07-16 Revised:2009-08-17 Online:2010-02-20 Published:2010-01-15
  • Contact: MA En-Bo E-mail:maenbo2003@sxu.edu.cn

Abstract:

In order to study the genetic diversity and genetic structure of populations, 7 populations of Oxya chinensis from 7 provinces (or cities) of China were analyzed using AFLP technique. A total of 336 reproducible bands were amplified with 7 primer combinations from 128 individuals. Two hundred and ninety-two bands (86.90%) were polymorphic. High genetic diversity was found among O. chinensis populations and Wanning population had higher genetic diversity than other populations. Mantel test (r=0.27, P=0.89) suggested that there was no significant association between genetic distance and geographic distance. Remarkable genetic differentiation was found among populations. Unweighted pair group method average (UPGMA) tree showed that the 7 O. chinensis populations were divided into 3 groups: Changping of Beijing, Tai-yuan of Shanxi and Jining of Shandong populations in the north; Hanzhong of Shaanxi, Changsha of Hunan and Laibin of Guangxi populations in the south; and Wanning of Hainan population. Principal component analysis indicated significant genetic differentiation of the north and the south populations and island and continent populations existed in the 7 O. chinensis populations because of geographic isolation.

Key words: Oxya chinensis, AFLP, genetic diversity, geographic isolation