4.6 Article

Y-Chromosomal Insights into Breeding History and Sire Line Genealogies of Arabian Horses

期刊

GENES
卷 13, 期 2, 页码 -

出版社

MDPI
DOI: 10.3390/genes13020229

关键词

horse breeding; foundation sire; Y chromosome; paternal lineage tracing; haplotype; Arabian horse; pedigree; male genealogy; genotyping

资金

  1. Innovation Fund of the Austrian Academy of Sciences (OAW) [IF_2015_17]
  2. Austrian Federal Ministry of Agriculture, Forestry, Environment and Water Management DAFNE [101184]
  3. National Priorities Research Program (NPRP) from the Qatar National Research Fund (a member of Qatar Foundation) [6-1303-4-023]
  4. Austrian Science Funds (FWF) [W1225]
  5. Russian Science Foundation [19-76-20058]

向作者/读者索取更多资源

In this study, Y-chromosomal lineage-tracing was conducted in Arabian horses to investigate their origin and influence on paternal lineages in populations. The study revealed unique Y-chromosomal haplotypes specific to Arabian horses, which were distinct from other horse breeds. The results also showed strong selection for relatively few male lineages in Arabian horse breeding, contradicting written pedigree records.
The Y chromosome is a valuable genetic marker for studying the origin and influence of paternal lineages in populations. In this study, we conducted Y-chromosomal lineage-tracing in Arabian horses. First, we resolved a Y haplotype phylogeny based on the next generation sequencing data of 157 males from several breeds. Y-chromosomal haplotypes specific for Arabian horses were inferred by genotyping a collection of 145 males representing most Arabian sire lines that are active around the globe. These lines formed three discrete haplogroups, and the same haplogroups were detected in Arabian populations native to the Middle East. The Arabian haplotypes were clearly distinct from the ones detected in Akhal Tekes, Turkoman horses, and the progeny of two Thoroughbred foundation sires. However, a haplotype introduced into the English Thoroughbred by the stallion Byerley Turk (1680), was shared among Arabians, Turkomans, and Akhal Tekes, which opens a discussion about the historic connections between Oriental horse types. Furthermore, we genetically traced Arabian sire line breeding in the Western World over the past 200 years. This confirmed a strong selection for relatively few male lineages and uncovered incongruences to written pedigree records. Overall, we demonstrate how fine-scaled Y-analysis contributes to a better understanding of the historical development of horse breeds.

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