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Genetic Polymorphism and Bottleneck Analysis of Balkhi,Hashtnagri, and Michni Sheep Populations Using Microsatellite Markers
Authors:Muhammad Ibrahim  Sohail Ahmad  Irfan Safdar Durrani  Aqib Iqbal  Iqbal Munir  Zahoor Ahmad Swati
Institution:Institute of Biotechnology and Genetic Engineering, The University of Agriculture Peshawar, Peshawar, Pakistan
Abstract:Pakistan is rich in sheep genetic resources. Balkhi, Hashtnagri, and Michni are neighboring sheep populations found in Khyber Pakhtunkhwa province of Pakistan. In this study, we analyzed the genetic structures and bottleneck incidents within these sheep populations using 31 microsatellite DNA markers. Total numbers of 116, 100, and 95 alleles, with average numbers of 3.20, 3.26, and 3.74 alleles per locus were observed, respectively, in Balkhi, Hashtnagri, and Michni population. Mean observed heterozygosity was 0.402 in Balkhi, 0.416 in Hashtnagri, and 0.522 in Michni population. All the three sheep populations showed significantly high inbreeding. Michni population was found to be in mutation drift equilibrium, showing the absence of genetic bottleneck. The data of Balkhi and Hashtnagri indicated the presence of genetic bottleneck in these populations. These results suggest a moderate level of genetic diversity within Michni population that may be useful for breed improvement programs. Hashtnagri and Balkhi populations having low within breed genetic variability may contain some valuable characteristics that need to be conserved.
Keywords:Balkhi  genetic bottleneck  Hashtnagri  Michni  microsatellites
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