RT Journal T1 ESTIMATES OF GENETIC PARAMETERS FOR DIRECT AND MATERNAL EFFECTS WITH SIX DIFFERENT MODELS ON BIRTH WEIGHT OF BROWN SWISS CALVES A1 E. Soydan A1 A. Şahin JF Journal of Animal and Plant Sciences JO JAPS SN 1018-7081 VO 26 IS 3 SP 577 OP 582 YR 2016 FD 2016/06/01 DO DOI NA AB

The aim of the present study was to estimate variance components, genetic parameters and breeding values for birth weights in Brown Swiss calves. Data were collected from the Malya State Farm in Kırşehir province of Turkey from 1995 through 2006. Random effects included direct and maternal additive genetic effects, maternal permanent environmental effects with direct maternal genetic covariance and random residual effects. Variance and covariance components and genetic parameters were estimated using the WOMBAT software by fitting six single-trait animal models. Depending on the model, hD2 varied from 0.13 to 0.30 for birth weight. Estimates of m2 ranged from 0.10 to 0.14 for birth weight. The maternal permanent environmental effect was significant for birth weight and ignoring maternal effects in the model caused the over estimation of direct heritability. The present study shows the importance of inclusion of maternal effects in designing appropriate breeding programs for genetic improvement in Brown Swiss calves for birth weight.

K1 direct heritability; maternal effects; calves, model PB Pakistan Agricultural Scientists Forum LK https://thejaps.org.pk/AbstractView.aspx?mid=2016-JAPS-78