Abstract

Genetic evaluations for Merino sheep have been largely restricted to additive animal models. Including nonadditive effects in genetic evaluations might improve estimation of additive effects and also aid in planning matings to improve progeny performance (Hayes and Miller, 2000). Considerable progress has been made in the study of nonadditive variation of farm animals (Henderson, 1985; Smith and Maki-Tanila, 1990; Hoeschele and VanRaden, 1991; Mizstal, 1997). Most studies on nonadditive effects have been in species other than sheep (Rye and Mao, 1998; Mizstal and Besbes, 2000). No information on nonadditive genetic effects in Merino sheep is available in the animal breeding literature. The objective of the present study was to estimate additive, dominance and permanent environmental variances for wool production traits in Merino sheep.  

K. V Konstantinov, F. D Brien, J. C Greeff

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 12, , 12.02, 2002
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