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Blood protein polymorphism in three sheep breeds from the south of Tunisia

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Author(s): Khaldi Zahrane, | Rekik Boulbaba, | Haddad Brahim, | Zourgui Lazher | Souid Sami

Journal: Research Opinions in Animal & Veterinary Sciences
ISSN 2221-1896

Volume: 1;
Issue: 2;
Start page: 69;
Date: 2011;
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Keywords: Tunisian sheep | Blood protein | Polymorphism | Genetic distance | Genetic diversity

ABSTRACT
Biochemical polymorphism was studied in the native ovine Barbarine (BAR) and Queue Fine de l’Ouest (QF) breeds as well as in the exotic D’man (DMN) breed in the South of Tunisia using a panel of six protein coding loci: Haemoglobin (Hb), Carbonic anhydrase (Ca), Albumin (Al), Transferrin (Tf), X-protein (X-p) and Arylesterase A (EsA). Polymorphic loci were detected by means of horizontal starch gel electrophoresis. All tested loci were polymorphic. The Tf locus exhibited the highest number of alleles while the other loci showed two alleles in all sampled breeds. Estimates of expected heterozygosity were almost twice those of observed heterosigositiy in all sheep populations and the high level of heterozygosity was observed in DMN breed. Genetic distances observed between BAR-DMN and between QF-DMN were larger than those found between BAR-QF breeds.
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