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The inheritance of fibre traits in a crossbred population of cashmere goats

  • S. C. Bishop (a1) and A. J. F. Russel (a2)

Abstract

Genetic parameters were calculated for fibre traits measured on patch samples taken at 5 months of age on a crossbred population of cashmere goats, comprising goats of Scottish feral, Icelandic, Tasmanian, New Zealand and Siberian origin. Within-strain heritabilities, fitting genetic origin as a covariable, were: live weight, 0·71 (s.e. 0·08), fibre diameter, 0·63 (0·07), diameter standard deviation 0·43 (0·08), logipatch cashmere weight), 0·60 (0·06), log(estimated annual cashmere production), 0·51 (0·07), and fibre length, 0·49 (0·15). Including between strain information increased these values to 0·74, 0·68, 0·45, 0·73, 0·67 and 0·57, respectively. Maternal effects for all fibre traits were negligible. Expressions were derived to relate cashmere weight to fibre diameter and length, using functional relationships between these traits. Logarithmic regressions showed cashmere weight to be proportional to diameter2'7, indicating that selection to reducefibre diameter will have a disproportionate effect on cashmere weight. Analyses of subsets of the data confirmed this and showed that correlated responses to selection can be accurately predicted by considering thefunctionally relatedfibre traits on the log scale.

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Bigham, M. L., Morris, C. A., Southey, B. R. and Baker, R. L. 1993. Heritabilities and genetic correlations for live weight and fibre traits in New Zealand Cashmere goats. Livestock Production Science 33: 91104.
Bishop, S. C. and Russel, A. J. F. 1994. Cashmere production from feral and imported cashmere goat kids. Animal Production 58: 135144.
Burfening, P. J. and Kress, D. D. 1993. Direct and maternal effects of birth and weaning weight in sheep. Small Ruminant Research. 10: 153163.
Couchman, R. C. and McGregor, B. A. 1983. A note on the assessment of down production in Australian 'cashmere' goats. Animal Production. 36: 317320.
Couchman, R. C. and Wilkinson, J. L. 1987. Genetic estimates for commercial cashmere traits. Proceedings of the second international cashmere conference, Lincoln, New Zealand, pp. 6883.
Gifford, D. R., Ponzoni, R. W., Ellis, N. J. S., Levinge, F. C. R. and Milne, M. L. 1990. Genetic parameters for production characteristics of Australian Cashmere goats. Proceedings of the Australian Association of Animal Breeding and Genetics 8: 461465.
Gordon, I. J. and Fraser, M. D. 1993. Foraging ecology of fibre producing ruminant species. In Alternative animals for fibre production (ed. Russel, A. J. F.), pp. 6376. Commission of the European Communities, Brussels.
International Wool Textile Organisation. 1989. Specification IWTO-8–89E. International Wool Secretariat, Ilkley, UK.
Maria, G. A., Boldman, K. G. and Van Vleck, L. D. 1993. Estimates of variance du e to direct and maternal effects for growth traits of Romanov sheep. Journal of Animal Science. 71: 845849.
Meyer, K. 1989. Restricted maximum likelihood to estimate variance components for animal models with several random effects using a derivative-free algorithm. Genetique, Selection, Evolution. 21: 317340.
Pattie, W. A. and Restall, B. J. 1989. The inheritance of cashmere in Australia n goats. 2. Genetic parameters and breeding values. Livestock Production Science. 21: 251261.
Pattie, W. A., Restall, B. J. and Smith, G. A. 1989. The measurement of cashmere produced by Australia n feral goats. Proceedings of the Australian Association of Animal Production. 15: 525528.
Pozo, M. del and Wright, I. A. 1995. Integration of sheep and goats in grazing systems on sown grass/clover swards. In Nutrition and grazing ecology of speciality fibre-producing animals (ed. Laker, J. P. and Russel, A. J. F.), European Fine Fibre Network, occasional publication no. 3, pp. 151161.
Thompson, R., Crump, R. E., Juga, J. and Visscher, P. M. 1995. Estimating variance s and covariances for bivariat e animal-models using scaling and transformation. Genetics, Selection, Evolution. 27: 3342.
Thompson, R. and Hill, W. G. 1990. Univariate REML analyses for multivariate data with the animal model. Proceedings of the fourth world congress on genetics applied to livestock production, Edinburgh, vol. XIII, pp. 484487.
Tosh, J. J. and Kemp, R. A. 1994. Estimation of variance components for lamb weights in three sheep populations. Journal of Animal Science 72: 11841190.

Keywords

The inheritance of fibre traits in a crossbred population of cashmere goats

  • S. C. Bishop (a1) and A. J. F. Russel (a2)

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