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OJVRTM
Online Journal of Veterinary Research©
Volume 20(5):353-361, 2016.
D-loop region sequence
genetic diversity-phylogenetic evolution in sheep.
Javanrouh Aliabad A, Salahadin Khodamoradi2, Hamid Reza
Seyedabadi1*
1Department
of Animal Biotechnology, Animal Science Research Institute of IRAN (ASRI),
Agricultural Research Education and Extension Organization (AREEO),Karaj, 2Department
of Animal Science, College of Agriculture, Mahabad
Branch, Islamic Azad University, Mahabad, Iran.
ABSTRACT
Javanrouh
Aliabad A, Khodamoradi S, Seyedabadi
HR., D-loop region sequence genetic diversity-phylogenetic evolution in sheep, Onl J Vet Res.,
20(5):353-361, 2016. Mitochondrial DNA was used to
determine genetic diversity and phylogenetic evolution in Zandi,
Ghezel, Shal, Haraki and Shinbash sheep
(n=129). Sixty-five haplotypes 0.972 ± 0.187 with nucleotide diversity highest
(P < 0.04) in Shal (0.016 ± 0.002) and lowest (P <
0.05) in Ghezel and Shinbash
(0.014 ± 0.014) were identified. The phylogenetic tree showed that
mitochondrial lineages diverged to Ghezel, Zandi, Harki, Shin and Shal breeds. Mitochondrial DNA of lineage A had remarkably
small genetic distances within population. Findings suggest that evolutionary
divergence based on mitochondrial DNA D-loop sequence may coincide with population
size. Iranian sheep revealed extensive and high mtDNA
haplotype diversity which is eroding due to indiscriminate
crossbreeding/intermixing between breeds, and lack of appropriate breeding and
management policies. The evolutionary divergence into distinct entities of
sheep breeds based on mtDNA D-loop sequence appear to
closely follow their geographical distribution.
Key Words:
genetic diversity, phylogenetic, mtDNA, Sheep.