Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Estimation of Genetic Parameters and Genetic Trends for Major Economic Traits in Swine

종돈의 주요 경제형질에 대한 유전모수 및 유전적 변화 추세 추정에 대한 연구

  • Kang, Hyun-Sung (Department of Animal Science & Technology, Sunchon National University) ;
  • Nam, Ki-Chang (Department of Animal Science & Technology, Sunchon National University) ;
  • Li, Yunxiao (Department of Animal Science & Technology, Sunchon National University) ;
  • Kim, Kyung-Tai (Breeding pig Improvement Center, NACF) ;
  • Lee, Myeong-Seop (Medi Kinetics CO) ;
  • Yoon, Jong-Taek (Department of Animal Science, Hankyong National University) ;
  • Seo, Kang-Seok (Department of Animal Science & Technology, Sunchon National University)
  • 강현성 (국립순천대학교 동물자원과학과) ;
  • 남기창 (국립순천대학교 동물자원과학과) ;
  • ;
  • 김경태 (농협중앙회 종돈개량사업소) ;
  • 이명섭 (메디키네틱스) ;
  • 윤종택 (국립한경대학교) ;
  • 서강석 (국립순천대학교 동물자원과학과)
  • Received : 2012.04.06
  • Accepted : 2012.04.24
  • Published : 2012.04.30
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Abstract

The objective of this study was to estimate the genetic parameters and breeding value of swine using their economic traits. The traits considered were age at 90 kilograms body weight (D90 kg), backfat thickness (BF) and eye muscle area (EMA). Estimation of genetic parameters and breeding value from 18,668 heads considering the economic traits were based on farm performance data from May 2007 to April 2011. Estimation of genetic parameters based on economic traits revealed that the single best model was fitted after finding source of variance on fixed and random effects and estimated by a multiple trait model using DF-REML (Derivative-FREE Restricted Maximum Likelihood). In this study, the estimated heritabilities of Duroc, Berkshire, Landrace and Yorkshire were about 0.22-0.59 for the D90 kg, 0.47-0.62 for the BF and 0.23-0.37 for the EMA. Genetic correlation of D90 kg with BF and EMA of the four breeds were -0.01-0.24 and -0.35--0.23, respectively. Moreover, the genetic correlation of BF with EMA was -0.68--0.17. On the other hand, the phenotypic correlation of D90 kg with BF and EMA of the four breeds were about 0.01-0.11 and -0.37--0.21, respectively, while the phenotypic correlation of BF with EMA was -0.68--0.17. Results showed that the genetic trends of breeding value every year were decreasing for D90 kg, increasing for BF while for EMA inconsistent values were obtained.

본 연구에서는 18,668두의 농장 검정된 종돈 자료를 이용하여 유전모수 및 육종가를 추정하였다. 2007년부터 5월부터 2011년 4월까지 영광 소재 N종돈장에서 검정된 Duroc, Berkshire, Landrace 및 Yorkshire종 18,668두에 대한 자료를 근거로 하여 돼지의 주요 경제형질인 90 kg 도달일령, 등지방두께 및 등심단면적에 대한 유전력, 유전상관, 표현형상관 및 육종가를 다형질 Animal model을 이용하여 추정하였다. 본 연구에서 추정된 Duroc종에 대한 90kg 도달일령, 등지방두께 및 등심단면적에 대한 유전력은 0.22, 0.62, 0.37로 추정되었으며 Berkshire종의 유전력은 0.52, 0.57 및 0.32로 나타났고 Landrace종의 각 형질의 유전력은 0.26, 0.51 및 0.23이었으며 Yorkshire종의 유전력은 0.29, 0.47 및 0.26을 나타내었다. 본 연구에서 추정된 Duroc의 주요 경제 형질간의 유전 상관 및 표현형 상관은 90 kg 도달일령과, 등지방두께, 등심단면적, 등지방와 등심단면적간에 각각 유전, 표현형상관 0.24, -0.25과 0.11, -0.21 그리고 -0.41 및 -0.19로 추정되었으며 Berkshire종 유전 상관 및 표현형 상관은 -0.01, -0.35 및 0.01, -0.28 그리고 등지방두께에 대한 등심단면적은 -0.68 및 -0.22를 나타내었다. Landrace종의 경우 유전 상관 및 표현형 상관이 90 kg 도달일령과, 등지방두께, 등심단면적, 등지방두께와 등심단면적간에 각각 유전, 표현형 상관 0.01,.-0.23과 0.03, -0.37 그리고 -0.17 및 -0.24로 추정 되었으며 Yorkshire종은 0.01, -0.23 및 0.03, -0.37 그리고 -0.17, -0.24로 추정 되었다. 연도별 유전적 개량 추세를 살펴보면 90 kg 도달일령의 경우 매년도달일령이 짧아지는 것을 나타냈으며 등지방두께의 경우 모든 품종에서 매년 두꺼워지는 것을 보였고 등심단면적은 각 품종이 매년 증감을 반복하는 것을 나타냈다.

Keywords

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