Genetic parameters for subjectively scored traits in yearling and adult fine wool Merinos

Author(s)
Robinson, Dorothy L
Mortimer, S I
Swan, Andrew
Purvis, I W
Publication Date
2007
Abstract
Genetic parameters were estimated for classer grade, handle, style, crimp definition, colour, neck wrinkle and body wrinkle scores in fine wool yearling wethers and yearling and adult ewes. Most traits had heritabilities of 20-40% and high genetic correlations (0.8 or more) between yearling and adult scores. The estimated genetic correlation between handle scores of independent assessors exceeded 0.99. Genetic correlations between subjective measurements and objectively measured traits were generally favourable. Softer handle was associated with lower fibre diameter (genetic correlations of 0.56 in yearlings, 0.57 in adults), increased yield (-0.55 and -0.39) and whiter colour (0.45 and 0.32). Better crimp definition was associated with lower variability of fibre diameter (0.45 and 0.46), whiter colour (0.31 and 0.51) and stronger staples (-0.24 and -0.37).
Citation
Proceedings of the Association for the Advancement of Animal Breeding and Genetics, v.17, p. 336-339
ISBN
1921208139
ISSN
1328-3227
Link
Publisher
Association for the Advancement of Animal Breeding and Genetics (AAABG)
Title
Genetic parameters for subjectively scored traits in yearling and adult fine wool Merinos
Type of document
Conference Publication
Entity Type
Publication

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