GENETIC PARAMETERS FOR CALVING EASE IN AYRSHIRES
- 1 March 1990
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Animal Science
- Vol. 70 (1) , 67-71
- https://doi.org/10.4141/cjas90-007
Abstract
Estimates of genetic parameters of calving ease were obtained in Ayrshires. A restricted maximum likelihood model was used with the fixed effects of herd, month-season of calving, sex of calf and dam weight, and the random effect of sire (of calf). The heritability of the direct effect in heifers and in adult cows was approximately 2%, with a genetic correlation between the direct effect in heifers and in adult cows of close to 70%. Key words: Variance, heritability, calving ease, AyrshireKeywords
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