32ba4027-85c7-4cbb-868f-423a00510f0e20220110075619299naun:naunmdt@crossref.orgMDT DepositInternational Journal of Biology and Biomedical Engineering1998-451010.46300/91011http://www.naun.org/cms.action?id=3041110202211020221610.46300/91011.2022.16https://npublications.com/journals/bio/2022.phpAlexander AlexandrovichErmakovMoscow Aviation Institute (National Research University), 4 Volokolamskoe shosse, 125993, Moscow Russian FederationThe Article describes the peculiarities of colour shades in the Golden Retriever breed. The separate attention was given to nowadays existence of different standards of coat colour in this breed across the world, and these standards admit a broad variety of different shades in golden colour. Herewith it has been established that the white pigmentation colour of golden retrievers is unallowable in any of “Kennel Club” standards valid for today. The special focus was put to the genotype of breed, which presupposes the existence of double recessive gene (e/e) that predetermines creamy shade of coat colour. It was discovered that exactly the gene MC1R, its autosomal-recessive inheritance, plays the leading role in defining the coat colour of dogs and in the exterior of the breed. It was assumed how and why this genotype is widespread in population, at which extent sub-populations are distinguished (American and English-European ones), and also there was the option offered related to breeding the pure line on the basis of knowledge about karyotype of dogs, that were obtained in a course of predicative screening of E-locus.1102022110202212012515https://npublications.com/journals/bio/2022/a302010-015(2022).pdf10.46300/91011.2022.16.15https://npublications.com/journals/bio/2022/a302010-015(2022).pdfhttps://www.thekennelclub.org.uk/search/breedsa-to-z/breeds/gundog/retriever-golden/. http://www.fci.be/en/nomenclature/GOLDENRETRIEVER-111.html. 10.1016/j.applanim.2006.04.025Liinamo, Anna-Elisa, et al. "Genetic variation in aggression-related traits in Golden Retriever dogs." Applied Animal Behaviour Science 104.1-2 (2007): 95-106. Wendy Andrews, "Golden Retriever. The Breed Standard Illustrated". 10.1163/15685306-12341491E. 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