Genetic relationship between Miyako and Yonaguni horses native to Okinawa based on polymorphisms of microsatellites

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  • SENJU Natsuko
    Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan Nagoya Higashiyama Zoo and Botanical Gardens, Aichi 464-0804, Japan
  • TOZAKI Teruaki
    Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan Laboratory of Racing Chemistry, Tochigi 320-0851, Japan
  • KAKOI Hironaga
    Laboratory of Racing Chemistry, Tochigi 320-0851, Japan
  • MATSUYAMA Ryota
    Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan
  • NAKAMURA Kotono
    Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
  • TAKASU Masaki
    Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan Education and Research Center for Food Animal Health (GeFAH), Gifu University, Gifu 501-1193, Japan

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<p>The Miyako and Yonaguni horses are native horses in Okinawa. Here, we evaluated their genetic relationship using microsatellite data and Kiso horses, which have four subpopulations, as a reference population for evaluating this relationship. Microsatellite data from 35 Miyako, 78 Yonaguni, and 172 Kiso horses were evaluated using the STRUCTURE software for analyzing multilocus genotype data to investigate the population structures and their underlying relationship. The results of the STRUCTURE analysis were stable when ΔK was 2, suggesting that the Okinawan horses are different from the Kiso horses. Moreover, the results were also stable when ΔK was 6; the sample was then divided into four subpopulations of the Kiso horses and two Okinawan horse breeds. However, the diagrams from the STRUCTURE analysis were unstable when ΔK was 3. These results suggest that the genetic relationship of the Okinawan horse breeds may be close, similar to that among the subpopulations of the Kiso horses.</p>

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