Journal article
Association of low race performance with mtDNA haplogroup L3b of Australian thoroughbred horses
Mitochondrial DNA: Part A, Vol.29(2), pp.323-330
2017
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Source: InCites
Abstract
<p>Mitochondrial DNA (mtDNA) encodes the genes for respiratory chain sub-units that determine the efficiency of oxidative phosphorylation in mitochondria. The aim of this study was to determine if there were any haplogroups and variants in mtDNA that could be associated with athletic performance of Thoroughbred horses. The whole mitochondrial genomes of 53 maternally unrelated Australian Thoroughbred horses were sequenced and an association study was performed with the competition histories of 1123 horses within their maternal lineages. A horse mtDNA phylogenetic tree was constructed based on a total of 195 sequences (including 142 from previous reports). The association analysis showed that the sample groups with poor racing performance history were enriched in haplogroup L3b (<em>p</em> = .0003) and its sub-haplogroup L3b1a (<em>p</em> = .0007), while those that had elite performance appeared to be not significantly associated with haplogroups G2 and L3a1a1a (<em>p</em> > .05). Haplogroup L3b and L3b1a bear two and five specific variants of which variant T1458C (site 345 in 16s rRNA) is the only potential functional variant. Furthermore, secondary reconstruction of 16s RNA showed considerable differences between two types of 16s RNA molecules (with and without T1458C), indicating a potential functional effect. The results suggested that haplogroup L3b, could have a negative association with elite performance. The T1458C mutation harboured in haplogroup L3b could have a functional effect that is related to poor athletic performance.</p>
Details
- Title
- Association of low race performance with mtDNA haplogroup L3b of Australian thoroughbred horses
- Creators
- Xiang Lin - Tianjin University of SportsHong_Xiang Zheng - Fudan UniversityAllan Davie - Southern Cross UniversityShi Zhou - Southern Cross UniversityLi Wen - Tianjin University of SportsJun Meng - Xinjiang Agricultural UniversityYong Zhang - Tianjin University of SportsQimude AladaerBin Liu - Xinjiang Institute of Ecology and GeographyWu-Jun Liu - Xinjiang Agricultural UniversityXin-Kui Yao - Xinjiang Agricultural University
- Publication Details
- Mitochondrial DNA: Part A, Vol.29(2), pp.323-330
- Identifiers
- 3401; 991012821013702368
- Academic Unit
- Faculty of Health; School of Health and Human Sciences; Human Sciences
- Resource Type
- Journal article