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Genetic and phenotypic relationships of reproduction with live weight and wool traits in a Mediterranean environment

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Cloete, S.W.P., Greeff, J.C. and Lewer, R.P. (2002) Genetic and phenotypic relationships of reproduction with live weight and wool traits in a Mediterranean environment. Wool Technology and Sheep Breeding, 50 (1). pp. 1-5.

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Article Link: https://sheepjournal.net/index.php/WTSB/article/vi...

Abstract

An additive genetic variance ratio (h2) for total weight of lamb weaned per breeding ewe over three reproduction opportunities (TWW3) was estimated in a medium wool resource flock. TWW3 was highly variable, with a coefficient of variation of 50 %. The between bloodline variance ratio for TWW3 was significant (P < 0.05), but failed to exceed 5 % of the across bloodline phenotypic variation. Within bloodline h2 (± s.e.) was estimated at 0.154 ± 0.040 for TWW3. Within bloodline genetic correlations of TWW3 amounted to respectively 0.58 ± 0.11, 0.26 ± 0.11, -0.24 ± 0.11 and 0.17 ± 0.10 with hogget live weight, clean fleece weight, clean fleece weight/kg live weight and fibre diameter. It was concluded that TWW3 would respond to selection in Western Australian Merinos. Genetic correlations with hogget live weight and fleece weight were favourable.

Item Type:Article
Subjects:Animal culture > Sheep > Wool production
Live Archive:16 Jan 2024 03:06
Last Modified:16 Jan 2024 03:06

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