Runs of homozygosity and signatures of selection: a comparison among eight local Swiss sheep breeds.

Signer-Hasler, H; Burren, A; Ammann, P; Drögemüller, Cord; Flury, C (2019). Runs of homozygosity and signatures of selection: a comparison among eight local Swiss sheep breeds. Animal genetics, 50(5), pp. 512-525. Wiley 10.1111/age.12828

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A dataset consisting of 787 animals with high-density SNP chip genotypes (346 774 SNPs) and 939 animals with medium-density SNP chip genotypes (33 828 SNPs) from eight indigenous Swiss sheep breeds was analyzed to characterize population structure, quantify genomic inbreeding based on runs of homozygosity and identify selection signatures. In concordance with the recent known history of these breeds, the highest genetic diversity was observed in Engadine Red sheep and the lowest in Valais Blacknose sheep. Correlation between F and F was around 0.50 and thereby lower than that found in similar studies in cattle. Mean F estimates from medium-density data and HD data were highly correlated (0.95). Signatures of selection and candidate gene analysis revealed that the most prominent signatures of selection were found in the proximity of genes associated with body size (NCAPG, LCORL, LAP3, SPP1, PLAG1, ALOX12, TP53), litter size (SPP1), milk production (ABCG2, SPP1), coat color (KIT, ASIP, TBX3) and horn status (RXFP2). For the Valais Blacknose sheep, the private signatures in proximity of genes/QTL influencing body size, coat color and fatty acid composition were confirmed based on runs of homozygosity analysis. These private signatures underline the genetic uniqueness of the Valais Blacknose sheep breed. In conclusion, we identified differences in the genetic make-up of Swiss sheep breeds, and we present relevant candidate genes responsible for breed differentiation in locally adapted breeds.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Institute of Genetics
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)

UniBE Contributor:

Drögemüller, Cord

Subjects:

500 Science > 590 Animals (Zoology)
600 Technology > 630 Agriculture
500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0268-9146

Publisher:

Wiley

Language:

English

Submitter:

Cord Drögemüller

Date Deposited:

26 Aug 2019 15:29

Last Modified:

22 Oct 2019 22:35

Publisher DOI:

10.1111/age.12828

PubMed ID:

31365135

Uncontrolled Keywords:

SNP genetic diversity inbreeding local breeds selection signatures

BORIS DOI:

10.7892/boris.132573

URI:

https://boris.unibe.ch/id/eprint/132573

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