Czech J. Anim. Sci., 2018, 63(11):462-472 | DOI: 10.17221/107/2018-CJAS

Allele frequencies in loci controlling coat colour in Polish Coldblood horsesOriginal Paper

Anna Stachurska1, Antoni Brodacki*,2, Marta Liss1
1 Department of Horse Breeding and Use, University of Life Sciences in Lublin, Lublin, Poland
2 Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Lublin, Poland

The objective of this study was to estimate the frequencies of alleles which produce coat colour in Polish Coldblood horse population, and to verify the hypothesis that coat colour is not considered in its selection. The analysis included 35 928 horses and their parents having been registered in the studbook over a half-century. Allele frequencies in Agouti (A), Extension (E), Dun (D), Roan (Rn), and Grey (G) loci, in parental and offspring generations, were estimated according to test matings and the square root of recessive phenotype frequency. The population structure is in Hardy-Weinberg equilibrium only at E locus and coat colour is regarded by breeders. Black horses are favoured. Higher E locus homozygosity in blacks than in bays makes it easier to obtain black foals. Dun-diluted, roan and grey coat colours are undesirable and the population has come to consist almost uniformly of basic coat colours. These results show the importance of studies on population genetic structure, which despite no formal criteria for breeding for colour, can considerably change through generations.

Keywords: generation; population genetic structure; test mating

Published: November 30, 2018  Show citation

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Stachurska A, Brodacki A, Liss M. Allele frequencies in loci controlling coat colour in Polish Coldblood horses. Czech J. Anim. Sci. 2018;63(11):462-472. doi: 10.17221/107/2018-CJAS.
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