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Anim Genet. 2015 Apr;46(2):213-5. doi: 10.1111/age.12273. Epub 2015 Feb 18.

DMRT3 is associated with gait type in Mangalarga Marchador horses, but does not control gait ability.

Author information

1
Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia, Salvador, BA, 40170-110, Brazil.

Abstract

The Mangalarga Marchador (MM) is a Brazilian horse breed known for a uniquely smooth gait. A recent publication described a mutation in the DMRT3 gene that the authors claim controls the ability to perform lateral patterned gaits (Andersson et al. 2012). We tested 81 MM samples for the DMRT3 mutation using extracted DNA from hair bulbs using a novel RFLP. Horses were phenotypically categorized by their gait type (batida or picada), as recorded by the Brazilian Mangalarga Marchador Breeders Association (ABCCMM). Statistical analysis using the plink toolset (Purcell, 2007) revealed significant association between gait type and the DMRT3 mutation (P = 2.3e-22). Deviation from Hardy-Weinberg equilibrium suggests that selective pressure for gait type is altering allele frequencies in this breed (P = 1.00e-5). These results indicate that this polymorphism may be useful for genotype-assisted selection for gait type within this breed. As both batida and picada MM horses can perform lateral gaits, the DMRT3 mutation is not the only locus responsible for the lateral gait pattern.

KEYWORDS:

Associação Brasileira dos Criadores do Cavalo Mangalarga Marchador; batida; equine; gaited horse PCR-RFLP; marcha; natural gait; picada; triple support

PMID:
25690906
DOI:
10.1111/age.12273
[Indexed for MEDLINE]

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