Genome‐wide identification of runs of homozygosity islands in the Gyr breed (Bos indicus)
- 19 January 2020
- journal article
- research article
- Published by Wiley in Reproduction in Domestic Animals
- Vol. 55 (3), 333-342
- https://doi.org/10.1111/rda.13639
Abstract
Runs of homozygosity (ROH) are contiguous homozygous regions of the genome. These regions can be used to identify genes associated with traits of economic interest, as well as inbreeding levels. The aim of the present study was to analyze the length and distribution of ROH islands in Gyr cattle and to identify genes within these regions. A population of 173 animals selected for beef production and a population of 291 animals selected for dairy production were used. Differences in the number of short ROH (ROH1‐2 Mb) were observed between the two populations, while the number of long ROH (ROH>16 Mb) was similar. ROH islands with the highest incidences (>0.50) overlapped in several segments of the genome in the two populations. The genes identified were associated with milk production, growth, reproduction, immune response, and resistance traits. Our results contribute to the understanding of how selection can shape the distribution of ROH and ROH islands within the same breed when animals are selected for different purposes such as dairy or beef production.Keywords
Funding Information
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (304047/2017‐1)
- Agence Universitaire de la Francophonie (1140/2018)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (2015/06686‐7)
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