Genetic Differentiation of Draa Indigenous Breed and Relationships with Other Goat Populations Assessed by Microsatellite DNA Markers

Subject Areas : Camel

ام. ایبنلبشیر ¹ , ال. کلی ² , آی. بوجنانه ³ , آ. چیخی ⁴ , آ. نبیچ ⁵ , ام. پیرو ⁶

1 - Center of Errachidia, Institut National de la Recherche Agronomique, PO Box 529, Boutalamine, Errachidia, Morocco
2 - Istituto di Zootecnica e BioDNA Centro di Ricerca sulla Biodiversità e sul DNA Antico, Facoltà di Scienze Agrarie, Alimentari e Ambientali, Università Cattolica del S. Cuore, Piacenza, Italy
3 - Department of Animal Production and Biotechnology, Institut Agronomique et Vétérinaire Hassan II, Rabat, Morocco
4 - Center of Kénitra, Institut National de la Recherche Agronomique, PO Box 1133, Kénitra, Morocco
5 - Laboratory of Veterinary Genetic Analyses, Institut Agronomique et Vétérinaire Hassan II, Rabat, Morocco
6 - Laboratory of Veterinary Genetic Analyses, Institut Agronomique et Vétérinaire Hassan II, Rabat, Morocco

Received: 2016-12-26 Accepted : 2017-04-30 Published : 2017-12-01

Keywords: genetic diversity, Morocco, Goat, microsatellites, Draa breed,

Abstract :

Moroccan goats are characterized by the presence of different populations identified only based on their phenotypes. The objectives of this study were to assess the genetic differentiation of the Draa goat breed and to analyze its genetic structure and its relationships with other local populations using 12 microsatellite markers. The screening was done in South Eastern and Southern Morocco on 192 animals form 5 populations, including Draa, Atlas, Barcha, Ghazzalia breeds, and from a set of goats showing highly variable phenotypes grouped together into “undefined goats” population. Population structure was assessed by standard diversity indices, multivariate statistics, analysis of molecular variance and bayesian clustering techniques. The mean allelic richness was 6.526, varying from 2.777 to 9.669. More than 88.4% of the total variance was distributed between individuals and only 1.85% was due to differences between populations. The Draa breed had the lowest observed heterozygosity (0.579), the highest inbreeding coefficient (0.161) and a higher number of deviations from Hardy-Weinberg equilibrium. Moreover, it had the highest genetic distances from the other populations. Bayesian clustering showed a high level of admixture between populations, with a single well defined cluster identifiable within Draa breed. It was concluded that the studied Moroccan goat populations have a substantial but weakly structured genetic diversity, with the exception of Draa breed which shows a higher degree of differentiation and population substructure.

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