Abstract:In the Australian sheep industry breeding ewes are usually selected by eye appraisal in the wool at from 18 months to 2 years of age. This paper reports a study of the improvement obtained in a flock by applying such methods, compared with improvement through selection on. wool weight. The possibility of selection at an earlier age was also investigated. Eye appraisal at any age was shown to be only approximately 30 per cent. efficient in raising wool weight per head, and approximately 45 per cent. efficient i… Show more
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