Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Effects of using Umbilical Hernia Animals as Breeding Pigs on the Reproductive Traits

배꼽탈장(umbilical hernia)돼지의 종돈 활용이 번식형질에 미치는 영향

  • Han, Sang-Hyun (Educational Science Research Institute, Jeju National University) ;
  • Cho, In-Cheol (Subtropical Livestock Research Institute, National Institute of Animal Science, RDA) ;
  • Cho, Yong-Il (Department of Animal Science and Technology, Sunchon National University) ;
  • Park, Yong-Sang (Department of Veterinary Medicine, Jeju National University) ;
  • Kang, Tae-Young (Department of Veterinary Medicine, Jeju National University)
  • 한상현 (제주대학교 교육과학연구소) ;
  • 조인철 (국립축산과학원 난지축산연구소) ;
  • 조용일 (순천대학교 동물자원과학과) ;
  • 박용상 (제주대학교 수의학과) ;
  • 강태영 (제주대학교 수의학과)
  • Received : 2016.08.03
  • Accepted : 2016.10.21
  • Published : 2017.04.28
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Abstract

This study investigated the incidence rate of umbilical hernia (UH) in pig farms and examined the effect of using them as breeding pigs on reproductive traits. The occurrence of UH ranged from 0.1% to 3.0% in pig farms investigated. UH pigs were found in almost all farms except for a single farm in Jeju Island. Spontaneously occurring UH pigs were selected and used for cross breeding tests. UH-related crosses and their progeny showed significant (P < 0.05) differences in gestation period, the numbers of piglets born and alive, and body weights at birth and $21^{st}$ day comparing to those of the control population. UH-related crosses showed longer gestation period, reduced numbers of piglets, and lighter body weights than those from the control population. Interestingly, reduced number of piglets was about one fourth, suggesting that UH inheritance might play a critical role as a lethal gene during embryogenesis. In addition, UH incidence rate in UH-related crosses was significantly (P < 0.05) higher than that in the control except for UH-cross3. However, in the progeny of control cross, a pig also had UH appearance, indicating that porcine UH might be inherited in recessive inheritance mode. Taken together, the results of this study indicate that UH is one of recessively inherited genetic defect that occurs at ordinary times in pig farms, suggesting that the use of UH animals as sire and/or dam may lead to economic losses due to increased gestation period, reduced numbers of piglets born and alive, and lower growth rates after birth of pigs.

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References

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