Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Estimation of genetic parameters for growth traits and backfat thickness using Maternal animal model in pigs

모체효과 모형을 이용한 돼지 품종 간의 성장형질 및 등지방두께에 대한 유전모수 추정

  • Kim, Yong-Min (Division of Swine Science, National Institute of Animal Science, Rural Development Administration) ;
  • Choi, Tae-Jeong (Division of Swine Science, National Institute of Animal Science, Rural Development Administration) ;
  • Cho, Eun-Seok (Division of Swine Science, National Institute of Animal Science, Rural Development Administration) ;
  • Cho, Kyu-Ho (Division of Swine Science, National Institute of Animal Science, Rural Development Administration) ;
  • Chung, Hak-Jae (Division of Swine Science, National Institute of Animal Science, Rural Development Administration) ;
  • Jeong, Yong-Dae (Division of Swine Science, National Institute of Animal Science, Rural Development Administration)
  • 김용민 (농촌진흥청 국립축산과학원 양돈과) ;
  • 최태정 (농촌진흥청 국립축산과학원 양돈과) ;
  • 조은석 (농촌진흥청 국립축산과학원 양돈과) ;
  • 조규호 (농촌진흥청 국립축산과학원 양돈과) ;
  • 정학재 (농촌진흥청 국립축산과학원 양돈과) ;
  • 정용대 (농촌진흥청 국립축산과학원 양돈과)
  • Received : 2017.10.16
  • Accepted : 2017.11.03
  • Published : 2017.11.30
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Abstract

This study was conducted to examine the influence of the maternal genetic effect of swine on their economic traits through the estimation of their genetic parameters, breeding value and genetic trends using an animal model. The data on Duroc pigs, Korean Native Pigs and Synthetic pigs (Duroc ${\times}$ Korean Native Pig) from 2000 to 2015 were obtained from the National Institute of Animal Science in Korea and used to estimate the genetic parameters for the average daily gain (ADG) and backfat thickness (BFT). Model 1 included the additive genetic effect of the animals, Model 2 consisted of Model 1 + the maternal genetic effect and Model 3 consisted of Model 2 + the maternal permanent environment effect. The heritability calculated by estimating the additive genetic effect was higher than that calculated by estimating the maternal genetic effect using the maternal animal model. The estimated genetic correlations between the additive and maternal genetic effects for the ADG and BF were strongly negative. Thus, the estimation of the breeding value can be used to select the most appropriate individuals and make an optimal breeding scheme.

국내에서는 우리 고유의 재래돼지가 보존되고 있으나 성장 및 번식능력이 낮고 등지방두께가 두꺼워 경제성이 떨어진다는 이유로 농가에서 사육을 기피하고 있다. 하지만, 나고야의정서 발효 등에 따라 고유 유전자원의 중요성은 커지고 있으며 따라서, 고유 유전자원인 재래돼지를 활용한 신 계통 개발의 중요성은 점차 커지고 있다. 본 연구는 개체모형을 이용하여 돼지의 경제적 형질에 대한 유전모수 및 유전적 변화의 추정을 통해 모체유전효과가 돼지의 경제 형질에 미치는 영향을 알아보기 위해 수행되었다. 자료는 국립축산과학원으로부터 2000년부터 2015년까지 수집한 두록종, 재래돼지 그리고 합성종(재래돼지${\times}$두록종)의 자료를 사용하였다. 본 연구에 사용된 경제형질은 일당증체량과 등지방두께를 이용하였으며 분석에 사용된 Model식은 개체효과만을 고려한 Model 1과 모체효과를 추가한 Model 2 그리고 모체 영구환경효과가 포함된 Model 3을 사용하여 분석에 이용하였다. 분석 결과 상가적 유전력이 모체효과 유전력보다 높은 유전력을 나타냈으며 상가적 유전분산과 모체 유전분산 간의 유전상관은 모든 품종에서 강한 부(-)의 상관관계를 가지는 것을 확인할 수 있었다. 따라서, 좀 더 효율적인 개량 효과를 거두기 위해서는 품종 및 형질 또는 개량 방향에 따라 개체 효과와 모체유전효과 그리고 유전상관을 적절히 고려해야 할 것으로 사료된다.

Keywords

References

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