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Mitochondrial and pedigree analysis in Przewalski’s horse populations: implications for genetic management and reintroductions.
Abstract: Przewalski's horses have been imported from the western zoos to China since 1985. Yet the genetic diversity in China's populations has not been studied, thus lacking of such knowledge inevitably affects this population's management. The aim of this study was to assess genetic diversity in Chinese population of Przewalski's horses via mitochondrial DNA (mtDNA) control region and pedigree analysis. Methods: Two captive and one reintroduced populations were examined based on mitochondrial DNA control region variation via fecal sampling from 2010 to 2012, together with pedigree analysis. Results: Amplification success rates of fecal mtDNA were as high as 96.2% (93.8%-100%), and were higher for sample in winter than in summer and autumn. Two haplotypes were identified and shared among three populations, but the proportion of individuals with each haplotype varied among the three populations (F(ST) = 0.10874, p = 0.00978). Haplotype diversity in the released population (0.153) was much lower than that in the two captive populations (0.4011 and 0.4966), in accordance with the direction of increase in probability of identity at the dam lines. Conclusions: Future concerns in Przewalski's horse population management should emphasize on strict reproduction control to minimize inbreeding in captivity, followed by long-term genetic diversity guidelines and non-invasive monitoring in the reintroduction programmes.
Publication Date: 2013-07-01 PubMed ID: 23808923DOI: 10.3109/19401736.2013.800487Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The article reveals that research was conducted to determine genetic diversity in China’s populations of Przewalski’s horses using mitochondrial DNA analysis and pedigree study. The findings from this study will help in managing the horse population more effectively.
Objective and Methodology
- The main objective of the study was to analyze genetic diversity in the Chinese population of Przewalski’s horses. This was done by studying variations in the mitochondrial DNA (mtDNA) control region and reviewing lineage records.
- The researchers studied two groups of these horses in captivity and one that had been reintroduced to the wild, gathering fecal samples over a period from 2010 to 2012 to conduct their DNA analysis.
Results and Findings
- The results showed that DNA could be effectively extracted from fecal samples, with a high success rate of over 96%. The extraction rate was found to be higher in winter than in summer and autumn.
- Two distinct haplotypes, or groups of genes inherited from a single parent, were found across all three populations. However, the percentage of individuals with each haplotype differed among the three populations.
- The level of genetic diversity (haplotype diversity) in the reintroduced population was lower than in the two captive populations, echoing an increase in the likelihood of shared lineage at the maternal level.
Conclusions and Implications
- Based on the results, the researchers concluded that effective management of Przewalski’s horse populations in the future will require careful control of reproduction to reduce inbreeding in captivity.
- Long-term plans should focus on maintaining genetic diversity and implementing non-invasive methods of monitoring in reintroduction programs.
- The study underscores the importance of understanding genetic diversity in conservation efforts, as it can influence how species are managed, and help to ensure their survival.
Cite This Article
APA
Liu G, Xu CQ, Cao Q, Zimmermann W, Songer M, Zhao SS, Li K, Hu DF.
(2013).
Mitochondrial and pedigree analysis in Przewalski’s horse populations: implications for genetic management and reintroductions.
Mitochondrial DNA, 25(4), 313-318.
https://doi.org/10.3109/19401736.2013.800487 Publication
Researcher Affiliations
- Laboratory of Non-invasive Research Technology for Endangered Species, College of Biological Science and Technology, Beijing Forestry University , Beijing , China .
MeSH Terms
- Animals
- Base Sequence
- DNA Primers
- DNA, Mitochondrial / genetics
- Female
- Horses / genetics
- Male
- Pedigree
- Polymerase Chain Reaction
Citations
This article has been cited 5 times.- Piras FM, Cappelletti E, Abdelgadir WA, Salamon G, Vignati S, Santagostino M, Sola L, Nergadze SG, Giulotto E. A Satellite-Free Centromere in Equus przewalskii Chromosome 10. Int J Mol Sci 2023 Feb 18;24(4).
- Nikbakhsh M, Varkoohi S, Seyedabadi HR. Mitochondrial DNA D-loop hyper-variable region 1 variability in Kurdish horse breed. Vet Med Sci 2023 Mar;9(2):721-728.
- Tang Y, Liu G, Zhao S, Li K, Zhang D, Liu S, Hu D. Major Histocompatibility Complex (MHC) Diversity of the Reintroduction Populations of Endangered Przewalski's Horse. Genes (Basel) 2022 May 23;13(5).
- King SRB, Schoenecker KA, Fike JA, Oyler-McCance SJ. Long-term persistence of horse fecal DNA in the environment makes equids particularly good candidates for noninvasive sampling. Ecol Evol 2018 Apr;8(8):4053-4064.
- Agbani A, Aminou O, Machmoum M, Germot A, Badaoui B, Petit D, Piro M. A Systematic Literature Review of Mitochondrial DNA Analysis for Horse Genetic Diversity. Animals (Basel) 2025 Mar 20;15(6).
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