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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

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.

Keywords

Genetic correlations;Animal model;Eye muscle area;Backfat thickness

Acknowledgement

Supported by : IPET

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