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Front. Genet. | doi: 10.3389/fgene.2019.00760

Microsatellite analysis of five populations of Alosa braschnikowi (Borodin, 1904) across the southern coast of the Caspian Sea

 Omid Jafari1,  Jorge M. Fernandes2*,  Aliakbar Hedayati1, Ali Shabany1 and Maryam N. Pourmoghadam3
  • 1Gorgan University of Agricultural Sciences and Natural Resources, Iran
  • 2Nord University, Norway
  • 3University of Tehran, Iran

Genetic diversity studies are essential in characterization of populations and species conservation. Alosa braschnikowi is a commercially valuable species native to the Caspian Sea. It is thought to have 8 to 9 subspecies but the genetics of these populations remains to be investigated. The present study was performed to evaluate the genetic population structures of Caspian marine shad (A. braschnikowi) in the southern coast of the Caspian Sea using six pairs of SSR markers. A total of A. braschnikowi 140 specimens through five locations across the southern coast of the Caspian Sea were genotyped and 130 alleles were identified. The overall mean values of Ho and He were 0.58 and 0.87, respectively, with highest and minimum value of Ho observed in Sari (0.66±0.08) and Miankaleh (0.50±0.04), respectively. The overall mean value of allelic richness was 12.6. The data suggest that there was a high rate of migration between populations of A. braschnikowi (overall mean of Nm= 8.45), with the highest value (9.89) between Sari and Miankaleh locations. AMOVA results showed that 96% of variation was related to within populations and only 4% belonged to between populations. The mean Fst value of 0.03 indicates a low level of population differentiation. Our data suggest that there may be two genetically separate populations of A. braschnikowi across the southern coast of the Caspian Sea and a high rate of migration is likely to limit genetic diversity between them.

Keywords: Alosa, Allelic richness, Genetic diversily, population structure, SSR Markers

Received: 22 Apr 2019; Accepted: 17 Jul 2019.

Edited by:

Tian Tang, Sun Yat-sen University, China

Reviewed by:

Joana I. Robalo, University Institute of Psychological, Social and Life Sciences, Portugal
Liping Zeng, University of California, Riverside, United States  

Copyright: © 2019 Jafari, Fernandes, Hedayati, Shabany and Pourmoghadam. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Jorge M. Fernandes, Nord University, Bodø, Norway, jorge.m.fernandes@nord.no