Selection signatures in worldwide sheep populations.

TitleSelection signatures in worldwide sheep populations.
Publication TypeJournal Article
Year of Publication2014
AuthorsFariello, M-I, Servin, B, Tosser-Klopp, G, Rupp, R, Moreno, C, San Cristobal, M, Boitard, S
Corporate AuthorsInternational Sheep Genomics Consortium
JournalPLoS One
Date Published2014
KeywordsAnimals, Gene Frequency, Genetic Markers, Genetic Variation, Polymorphism, Single Nucleotide, Selection, Genetic, Sheep

The diversity of populations in domestic species offers great opportunities to study genome response to selection. The recently published Sheep HapMap dataset is a great example of characterization of the world wide genetic diversity in sheep. In this study, we re-analyzed the Sheep HapMap dataset to identify selection signatures in worldwide sheep populations. Compared to previous analyses, we made use of statistical methods that (i) take account of the hierarchical structure of sheep populations, (ii) make use of linkage disequilibrium information and (iii) focus specifically on either recent or older selection signatures. We show that this allows pinpointing several new selection signatures in the sheep genome and distinguishing those related to modern breeding objectives and to earlier post-domestication constraints. The newly identified regions, together with the ones previously identified, reveal the extensive genome response to selection on morphology, color and adaptation to new environments.

Alternate JournalPLoS ONE
PubMed ID25126940
PubMed Central IDPMC4134316