Genetic signatures of a Mediterranean influence in Iberian peninsula sheep husbandry

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Pereira, F (Author) Other; Davis, SJM (Author) Other; Pereira, L (Author) Other; McEvoy, B (Author) Other; Bradley, DG (Author) Other; Amorim, A (Author) FCUP

Journal

Title: Molecular Biology and Evolution

Vol. 23

Pages: 1420-1426

ISSN: 0737-4038

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 75 Citations

Scopus - 79 Citations

Scientific classification

FOS: Natural sciences > Biological sciences

Other information

Authenticus ID: P-004-JZC

DOI: 10.1093/molbev/msl007

Abstract (EN): Highly adaptable and versatile populations of domestic sheep, the result of millennia of intense husbandry, are found in almost every corner of the world. Here we describe a genetic survey of sheep from the western fringe of its European distribution. We studied the mitochondrial DNA control region sequences from 161 individuals belonging to 7 Portuguese sheep breeds. Our study revealed a high level of genetic diversity, with an average breed haplotype diversity of 0.983, substantially above that observed in central European breeds, as well as the presence of maternal lineages until now only found in the Middle East and Asia. A broad north-south pattern describes the most important trend in the Portuguese sheep population with a southern population clearly distinct from most other breeds. A recurrent influx of new genetic diversity, probably via the Mediterranean Sea, may explain these patterns and appears to corroborate the importance of this maritime route in the history of both mankind and livestock. Zooarchaeological studies of sheep bones from southern Portugal indicate a marked size increase during the Moslem period that may reflect an improvement of this animal-perhaps part of the well known "Arab agricultural revolution" in Andalusia. This could have been a time when the gene pool of Iberian sheep was substantially enriched and may help to explain the history of modem sheep breeds in this peninsula.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7