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Livestock Genomics for Developing Countries

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Front. Genet. | doi: 10.3389/fgene.2018.00408

Microsatellite-based genetic structure and diversity of local Arabian sheep breeds

  • 1Animal Production, Mutah University, Jordan
  • 2Animal Production, King Saud University, Saudi Arabia

The genetic diversity of the sheep breeds in the Arab countries might be considered to be a mirror of the ecology of the region. In this study, the genetic structure and diversity of sheep breeds from Saudi Arabia (Harri, Najdi, Naemi, Arb and Rufidi) and Awassi sheep from Jordan as an out-group were investigated using 19 microsatellites. All the breeds had high intra-population genetic diversity expressed as allelic number (7.33) and richness (2.9) and, expected heterozygosity (0.77). Structure analysis revealed three main gene pools underlying the ancestral genetic diversity of the study populations. The first pool had Harri, Najdi and Rufidi breeds; the second had Naemi and Awassi breeds, and the third had the Arb breed which was significantly differentiated from the other breeds. Factorial correspondence analysis lent further support to the presence of the three gene pools. Although the outgroup Awassi sheep was more clearly differentiated, it still genetically close to Naemi sheep. The differentiation of the Arb breed could have been resulted from geographic and reproductive isolation. On the other hand, the genetic structure of the other two gene pools could be the result of the past and recent gene flow between individuals reared in the region known to be the center for animal husbandry and trading until the current time.

Keywords: Ovis aries, Gene Flow, admixture, ancestry, Biodiversity

Received: 12 Nov 2017; Accepted: 04 Sep 2018.

Edited by:

Johann Sölkner, Universität für Bodenkultur Wien, Austria

Reviewed by:

Kwan-Suk Kim, Chungbuk National University, South Korea
Filippo Biscarini, Consiglio Nazionale Delle Ricerche (CNR), Italy  

Copyright: © 2018 Al-Atiyat, Aljumaah, Alshaikh and Abudabos. 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. Raed M. Al-Atiyat, RA., Mutah University, Animal Production, Karak, Mutah 7, Karak, Jordan, raedatiyat@gmail.com