In:
Animal Genetics, Wiley, Vol. 48, No. 5 ( 2017-10), p. 551-559
Abstract:
A previous study revealed a strong association between the DMRT 3:Ser301 STOP mutation in horses and alternate gaits as well as performance in harness racing. Several follow‐up studies have confirmed a high frequency of the mutation in gaited horse breeds and an effect on gait quality. The aim of this study was to determine when and where the mutation arose, to identify additional potential causal mutations and to determine the coalescence time for contemporary haplotypes carrying the stop mutation. We utilized sequences from 89 horses representing 26 breeds to identify 102 SNP s encompassing the DMRT 3 gene that are in strong linkage disequilibrium with the stop mutation. These 102 SNP s were genotyped in an additional 382 horses representing 72 breeds, and we identified 14 unique haplotypes. The results provided conclusive evidence that DMRT 3:Ser301 STOP is causal, as no other sequence polymorphisms showed an equally strong association to locomotion traits. The low sequence diversity among mutant chromosomes demonstrated that they must have diverged from a common ancestral sequence within the last 10 000 years. Thus, the mutation occurred either just before domestication or more likely some time after domestication and then spread across the world as a result of selection on locomotion traits.
Type of Medium:
Online Resource
ISSN:
0268-9146
,
1365-2052
DOI:
10.1111/age.2017.48.issue-5
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
1472889-8
SSG:
22
SSG:
12
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