Data of all the lambs born to the Elsenburg Dormer (n = 303) and SA Mutton Merino (n = 325) flocks during the 1977 and 1978 lambing seasons as well as their female relatives were used to study various aspects…
Data of all the ram lambs born to the Elsenburg Dormer (n = 144)and SA Mutton Merino (n = 166) flocks during the 1977 and 1978 lambing seasons as well as that of their female relatives were used to study…
The repeatability of the reproduction rate of commercial Merino ewes. The repeatability of the reproduction rate of 143 and 423 Merino ewes in two commercial flocks was investigated. Ewes from flocks were grouped as those that failed to lamb and…
The repeatability of reproduction rate at 2 years or up to 3 years of age was investigated by regression methods considering subsequent reproduction averaged over a number of lambing opportunities or within subsequent age groups. Results from the study suggested…
Data of the Tygerhoek Merino flock were used to obtain halfsib heritability estimates for the components of reproduction rate within age groups as well as averaged over a number of lambing opportunities. Two separate sets of data were considered. The…
