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Genetic polymorphism of transferrin gene in Najdi sheep in Iraq

Talib Ahmed Jaayid

Genetic Engineering Lab., College of Agriculture, Basrah University (UoB), Basrah 320, Iraq


The study investigated the existence of polymorphism at transferrin (Tf) locus in Najdi sheep breed. A polyacrylamide gel electrophoresis under alkaline condition was used to distinguish Najdi Tf alleles. Analysis of 35 animals revealed that all animals were polymorphic, showing many genotypes with clear biodiversity in the Tf gene. Six Tf genotypes consisting of three homozygote types (AA, BB and CC) and three heterozygote types (AB, AC and BC) were detected. These genotypes are controlled by codominant autosomal gene according to the Mendelian laws of inheritance. The highest gene frequencies were calculated as 0.47 for Tf B. Differences between expected and observed number of tf genotypes were significant. Therefore, polymorphism of sheep tfs can be used for the identification of its offspring and its possible benefit in genetic improvement programs of domestic animals and the conservation of bio-diversity. This will also be useful in genetic improvement process by enhancing selection and breeding programs.

Keywords: Polymorphism; transferrin gene; Najdi sheep breed; polyacrylamide gel electrophoresis
To cite this article: Jaayid TA, 2014. Genetic polymorphism of transferrin gene in Najdi sheep in Iraq. Res. Opin. Anim. Vet. Sci., 4(11): 578-581.

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