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Animals : an open access journal from MDPI2022; 12(15); doi: 10.3390/ani12151870

Mitochondrial Whole D-Loop Variability in Polish Draft Horses of Sztumski Subtype.

Abstract: The Polish draft horse (PDH) breed is a result of crossing local mares with imported cold-blooded stallions, such as Belgians, Ardennes, Fjords, and others. A part of the broodmare stock investigated in this study was also imported from various countries, such as Denmark. In this study, we investigate the genetic composition of the PDH by analyzing the whole mitochondrial d-loop variability and comparing it to previously demonstrated whole d-loop sequences of other cold-blooded breeds: Ardennais, Belgian, Breton, Clydesdale, Noriker, Norwegian Fjord, Percheron, and Suffolk. Our results show high nucleotide diversity within the PDH population (π = 0.011), and the existence of two main haplogroups: one of relatively concise origin, with strong kinship to the Belgian breed, and the second showing close relation to the majority of other analyzed cold-blooded breeds. Some of the PDH maternal strains clustered separately, which can be a result of the influence of other unidentified breeds that served as a foundation stock for the present population. This present study explains the genetic relationship of the PDH to other cold-blooded breeds and indicates the high genetic diversity of the breed.
Publication Date: 2022-07-22 PubMed ID: 35892520PubMed Central: PMC9332387DOI: 10.3390/ani12151870Google Scholar: Lookup
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  • Journal Article

Summary

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The research article discusses an analysis of the genetic structure of the Polish draft horse, particularly focusing on aspects related to the mitochondrial d-loop. The results indicate high genetic diversity within the horse population and also identify two primary subgroups based on close genetic relationship to other specific horse breeds.

Background and Methods Used

  • The Polish draft horse (PDH) is a breed that resulted from crossbreeding local females with imported cold-blooded stallions belonging to several breeds such as Belgians, Ardennes, Fjords and others. The study also included some breed stock imported from a few countries, like Denmark.
  • The researchers worked to analyze the genetic composition of PDHs. To do this, they studied the “whole mitochondrial d-loop variability” which is a measure of the variation in the mitochondrial DNA of the horses. They then compared this information with previously analyzed data from other cold-blooded horse breeds.

Results of the Study

  • The investigations concluded that there is a high nucleotide diversity within the PDHs’ population. Nucleotide diversity refers to the level of genetic variation in a given population, in this case, the PDHs.
  • They also found two major haplogroups within the PDHs’ population. Haplogroups are genetically inherited clusters or groups.
  • The first group appeared to have a concise (defined or clear-cut) origin and demonstrated a strong kinship or genetic relation to the Belgian breed.
  • The second group was closely related to most of the other cold-blooded breeds that were analyzed in this study.
  • Interestingly, researchers noted that some of the PDH maternal strains formed unique clusters, implying that they could be influenced by other unidentified breeds which served as foundation stock for the existing population.

Conclusion and significance of the Study

  • The researchers concluded that the PDHs hold high genetic diversity based on their findings.
  • The study helps to understand the genetic relationship of PDHs with other cold-blooded breeds, providing valuable insights into genetic lineage and diversity.
  • Such information may be important for breed management, conservation, and understanding the genetic basis of specific traits in these horses.

Cite This Article

APA
Myćka G, Klecel W, Stefaniuk-Szmukier M, Jaworska J, Musiał AD, Ropka-Molik K. (2022). Mitochondrial Whole D-Loop Variability in Polish Draft Horses of Sztumski Subtype. Animals (Basel), 12(15). https://doi.org/10.3390/ani12151870

Publication

ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 12
Issue: 15

Researcher Affiliations

Myćka, Grzegorz
  • Department of Biotechnology and Horticulture, University of Agriculture in Kraków, al. 29 Listopada 54, 31-425 Kraków, Poland.
Klecel, Weronika
  • Department of Animal Genetics and Conservation, Institute of Animal Science, Warsaw University of Life Sciences, ul. Ciszewskiego 8, 02-786 Warsaw, Poland.
Stefaniuk-Szmukier, Monika
  • Department of Animal Genomics and Molecular Biology, National Research Institute of Animal Production, ul. Krakowska 1, 32-083 Balice, Poland.
Jaworska, Joanna
  • Department of Gamete and Embryo Biology, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, 10-747 Olsztyn, Poland.
Musiał, Adrianna Dominika
  • Department of Animal Genomics and Molecular Biology, National Research Institute of Animal Production, ul. Krakowska 1, 32-083 Balice, Poland.
Ropka-Molik, Katarzyna
  • Department of Animal Genomics and Molecular Biology, National Research Institute of Animal Production, ul. Krakowska 1, 32-083 Balice, Poland.

Grant Funding

  • 01-18-08-11 / National Research Institute of Animal Production

Conflict of Interest Statement

The authors declare no conflict of interest.

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