Abstract
A fine wool index selection flock (I) was established by screening the Tara Hills Merino flocks in 1988 and 1989. The flock of 200 breeding ewes was formed with equal numbers of four age groups born in 1984 to 1987. A randomly sampled 160 ewes from the same population served as the Control (C). The greasy fleece weights of the I flock were 8.3% (P<0.001), 6.8% (P<0.001) higher than that of C flock in 1988 and 1989 respectively. Spring live weight (P<0.05) and yield (P<0.001) were significantly higher while fibre diameter (P<0.001) was significantly lower for I. Progeny hogget fleece weight, live weight and fibre diameter, however, differed insignificantly between flocks.
Proceedings of the New Zealand Society of Animal Production, Volume 51, , 309-314, 1991
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