Journal of Tropical Oceanography ›› 2018, Vol. 37 ›› Issue (3): 65-72.doi: 10.11978/2017084CSTR: 32234.14.2017084

• Orginal Article • Previous Articles     Next Articles

Analysis of genetic diversity among three wild populations of Penaeus monodon using microsatellite marker

Zhiying ZHAO1,2(), Liyun LIANG2, Lirong BAI1,2   

  1. 1. Hainan Academy of Ocean and Fisheries Sciences, Haikou 571126 China
    2. Hainan Key Laboratory of Tropical Marine Culture Technology, Qionghai 571429, China
  • Received:2017-07-30 Revised:2017-10-17 Online:2018-06-10 Published:2018-05-03
  • Supported by:
    Application Technology R & D and Demonstration Project of Hainan Province (ZDXM2015025)

Abstract:

Genetic diversity and genetic differentiation among 90 individuals of Penaeus monodon from three wild populations (Zhanjiang, Sanya, and Qionghai) were investigated by using 14 pairs of simple sequence repeat (SSR) specific primers. The number of alleles detected by each pair of primers ranged from 2 to 4, with the average of 2.7. The mean polymorphism information contents of the three populations were 0.3864, 0.3926, and 0.4078, respectively; and the mean effective numbers of alleles were 1.9081, 1.9715 and 2.0185, respectively. The average expected heterozygosity (0.4605) of the three populations was significantly higher than the observed heterozygosity (0.40469), indicating moderate polymorphism and the existence of heterozygosity deficiency among the three populations. The results of genetic distances and genetic similarity showed that the genetic differentiation among the three populations was low; genetic variation occurred mainly within populations, not among populations. The genetic relationship of Sanya and Qionghai populations was the closest, while that of Sanya and Zhanjiang populations was the farthest. Analysis of molecular variance (AMOVA) revealed that most of the genetic variation resided within populations (92%), and less, among populations (8%), suggesting rich genetic diversity level within populations.

Key words: Penaeus monodon, microsatellite marker, population, genetic diversity, genetic differentiation