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An evaluation of Merino wool quality: III. The prediction of uniformity of fleece characters from fleece and skin characters of the birthcoat

Published online by Cambridge University Press:  27 March 2009

J. R. Gallagher
Affiliation:
Department of Livestock Husbandry, University of New England, Armidale, N.S.W., Australia

Summary

Fibres of anomalous length or diameter are undesirable in the Merino, a breed noted for uniformity of fleece characters. Previous studies which have aimed at estimating adult fleece quality have been based on visual appraisal of the birthcoat. This study was undertaken to test the prediction of uniformity of fibre length at 10½ months and fibre diameter at 15 months from the objective measurement of birthcoat fleece and skin follicle characters.

The results indicated that fibre length uniformity at 10½ months cannot be predicted from measurement of fleece or skin characters at birth. It was found that fibre diameter uniformity at 15 months can be predicted from objective measurement of mean fibre diameter of the birthcoat but not by visual appraisal.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1971

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References

Bhattacharya, P. & Hammond, J. (1951). The lamb's tail in relation to wool type in British breeds and crosses of sheep. J. agric. Sci., Camb. 42, 180–83.CrossRefGoogle Scholar
Burns, M. (1966). Merino birthcoat fibre types and their follicular origin. J. agric. Sci., Camb. 66, 155–73.CrossRefGoogle Scholar
Carter, H. B. & Clarke, W. H. (1957). The hair follicle group and skin follicle population of Australian Merino sheep. Aust. J. agric. Res. 8, 91108.CrossRefGoogle Scholar
Cassie, A. B. D. (1942). J. Text. Inst. 33, T 195. Cited by Lang (1961).CrossRefGoogle Scholar
Dry, F. W. (1933 a). Hairy fibres of the Romney sheep. I. Halo-hairs and their inheritance. N.Z. Jl Agric. 46, 1022.Google Scholar
Dry, F. W. (1933 b). II. Sickle-fibres. N.Z. Jl Agric. 46, 141–53.Google Scholar
Dry, F. W. (1933 c). III. Curly-tip fibres. N.Z. Jl Agric. 46, 279–88.Google Scholar
Dry, F. W. (1933 d). The pre-natal check in the birthcoat of the New Zealand Romney lamb. N.Z. Jl Sci. Technol. XIV, 353–58.Google Scholar
Dry, F. W. (1955). Multifactorial inheritance of halohair abundance in New Zealand Romney sheep. Aust. J. agric. Res. 6, 608–23.CrossRefGoogle Scholar
Duerden, J. E. (1927). Evolution in the fleece of sheep. S. Afr. J. Sci. 24, 388415.Google Scholar
Elphick, B. L. (1932). A simple test for the detection of hairiness in the fleece with a note on fleece sampling. Massey Agric. College, Bull. No. 3.Google Scholar
Fraser, A. S. (1952). Growth of wool fibres in sheep. Aust. J. agric. Res. 3, 419–34.CrossRefGoogle Scholar
Gallagher, J. R. (1970 a). An evaluation of Merino wool quality. II. An estimate of the incidence of coarse fibres in Australian Merino wool. J. agric. Sci., Camb. 74, 99102.CrossRefGoogle Scholar
Gallagher, J. R. (1970 b). A metrological and histological evaluation of Merino wool quality. Ph.D. thesis, Univ. New England.Google Scholar
Gallagher, J. R. & Yeates, N. T. M. (1970). An evaluation of Merino wool quality. I. The incidence of coarse fibres in two Australian Merino flocks. J. agric. Sci., Camb. 74, 9198.CrossRefGoogle Scholar
Lang, W. R. (1961). Fibre thickness, crimp frequency and quality number of Australian wool. Wool Technol. Sheep Breed. 8, 1120.Google Scholar
Lockart, L. W. (1956). Birthcoat of lambs and adult fibre diameter. Aust. J. agric. Res. 7, 152–57.CrossRefGoogle Scholar
Martindale, J. G. (1969). The effect of variability of fibre diameter on worsted processing. J. Text. Inst. 60, 8183.CrossRefGoogle Scholar
McMahon, P. R. (1937). Methods for the estimation of medullation in wool samples. J. Text. Inst. 28, T 349.CrossRefGoogle Scholar
Morley, F. H. (1955). Selection for economic characters in Australian Merino sheep. V. Further estimates of phenotypic and genetic parameters. Aust. J. agric. Res. 6, 7790.CrossRefGoogle Scholar
Roberts, N. F. (1961). The effect of fibre fineness and crimp on worsted spinning limits, yarn irregularity and handle. Wool Technol. Sheep Breed. 8, 2736.Google Scholar
Ryder, M. L. & Stephenson, S. K. (1968). Wool Growth, 805 pp. London: Academic Press.Google Scholar
Schinckel, P. G. (1955 a). The post-natal development of the skin follicle population in a strain of Merino sheep. Aust. J. agric. Res. 6, 6876.CrossRefGoogle Scholar
Schinckel, P. G. (1955 b). The relationship of skin follicle development to growth rate in sheep. Aust. J. agric. Res. 6, 308–23.CrossRefGoogle Scholar
Schinckel, P. G. (1955 c). Inheritance of birthcoats in a strain of Merino sheep. Aust. J. agric. Res. 6, 595607.CrossRefGoogle Scholar
Schinckel, P. G. (1958). Relationship of lamb birthcoat to adult fleece structure in a strain of Merino sheep. Aust. J. agric. Res. 9, 567–78.CrossRefGoogle Scholar
Schinckel, P. G. & Short, B. F. (1961). The influence of nutritional level during pre-natal and early postnatal life on adult fleece and body characters. Aust. J. agric. Res. 12, 176202.CrossRefGoogle Scholar
Short, B. F. (1955 a). Development of the secondary follicle population in sheep. Aust. J. agric. Res. 6, 6267.CrossRefGoogle Scholar
Short, B. F. (1955 b). Developmental modification of fleece structure and adverse maternal nutrition. Aust. J. agric. Res. 6, 863–72.CrossRefGoogle Scholar
Stephenson, S. K. (1956). Some aspects of gene dosage in N-type sheep. Aust. J. agric. Res. 7, 447–68.CrossRefGoogle Scholar
Thomasset, L. F. (1938). A study of the development of the characters of the fleece during growth in the different regions of the body. J. agric. Sci., Camb. 28, 523–40.CrossRefGoogle Scholar