DOI QR코드

DOI QR Code

Estimation of Genetic Variance and Covariance Components for Litter Size and Litter Weight in Danish Landrace Swine Using a Multivariate Mixed Model

  • Wang, C.D. (Laboratory of Statistical Genetics, Institute of Environment & Life Science Hallym University) ;
  • Lee, C. (Laboratory of Statistical Genetics, Institute of Environment & Life Science Hallym University)
  • 투고 : 1999.02.03
  • 심사 : 1999.04.06
  • 발행 : 1999.11.01

초록

Single trait mixed models have been dominantly utilized for genetic evaluation of the reproductive traits in swine. However employing multiple trait approach may lead to more accurate genetic evaluations. For 5 litter size and litter weight traits of Danish Landrace, genetic parameters were estimated with a multiple trait mixed model. The heritability estimates were 0.02, 0.03, 0.03, 0.05, and 0.07, respectively for litter size at birth, litter size born alive, litter weight at birth, litter size at weaning, and litter weight at weaning. Negative genetic correlations were all positive. The litter weight at birth showed genetic antagonism with litter size born alive (-0.65) and litter size at weaning (-0.31), but positive with litter size at birth (0.47) and litter weight at weaning (0.31). The estimates of environmental correlations were larger than their corresponding genetic correlation estimates except for those between litter weight at birth and the other four traits. This study recommends simultaneous selection for two or more traits with multivariate mixed models in order to improve overall economic response.

키워드

Genetic Correlation;Litter Size;Litter Weight;Variance Component

과제정보

연구 과제 주관 기관 : Hallym University