Genetic parameters for Australian maternal and dual-purpose meatsheep breeds, 3. Liveweight, fat depth and wool production in Coopworth sheep
1994
Brash, L.D. | Fogarty, N.M. | Gilmour, A.R. (New South Wales Agriculture, Orange (Australia). Agricultural Research and Veterinary Centre)
Heritability was estimated for weaning liveweight of 7030 Coopworth sheep from 10 flocks representing 92 sires by derivative-free restricted maximum likelihood procedures using an animal model. Similar analyses were used for yearling liveweight and greasy fleece weight with over 4000 animals, fat depth on 2184 animals and fibre diameter on 966 animals. The fixed effects of flock-year-management group, sex, birth type, rearing type and age were significant for most traits. The genetic correlations of liveweights with greasy fleece weight are positive, but close to zero with fibre diameter. Fat depth was highly genetically correlated with liveweights at weaning and yearling ages, was highly negatively correlated with fibre diameter and had a small positive genetic correlation with greasy fleece weight.
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