Selection indices for evaluation of wool production of German Mutton Merino and Wurttemberg Merino sheep. 1. Determination of genetic indices

Wozel, J.; Konig, K.H.

Archiv fur Tierzucht 24(2): 169-179

1981


Accession: 001249792

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Abstract
Data recorded between 1969 and 1972 on 4250-5800 German Mutton Merino young ewes at 2 breeding centres and on 5000 Wurttemberg Merinos in 6 flockbook-registered flocks were analysed. For the 2 breeds, the phenotypic correlation between greasy wool yield and staple length was 0.109 and 0.178 resp. within herds, and the genetic correlation 0.195 and 0.049, the first 3 correlations being significant. Corresponding values for lambs were 0.157, 0.343, -0.206 and 0.505, the values for wool yield and staple length being measured at 5-6 months of age and corrected to 150 days of age. Using Hazel's method [see ABA 12, 175] of path coefficients on the above data, indices incorporating the 2 traits and their economic weightings were derived. For selection on yearlings, the weighting lay between 2:1 and 3:1 for wool yield:staple length.