TLDR The FGF5 gene variant causes long hair in Akitas, and genetic testing is advised to manage coat length and welfare.
The study identifies the FGF5:c.578C>T genetic variant as the cause of long hair in Akitas, inherited in an incompletely dominant manner. Analyzing DNA from 60 modern and 73 classic Akitas, researchers found a higher frequency of the T allele in modern Akitas (0.350) compared to classic ones (0.212). Breeders' preference for heterozygous C/T dogs, which have a fluffier coat, may increase the T allele frequency, leading to more long-haired Akitas that do not meet breed standards and may face welfare issues. The study recommends genetic testing to manage the T allele frequency, reduce long-haired births, and ensure the welfare and conservation of the breed.
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