Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-30T14:37:49.340Z Has data issue: false hasContentIssue false
  • English
  • Français

The association between non-fleece pigmentation and fleece pigmentation in Corriedale sheep

Published online by Cambridge University Press:  02 September 2010

M. R. Fleet  and
J. E. Stafford
M. R. Fleet
Affiliation:
South Australian Department of Agriculture, Box 1671, GPO, Adelaide 5001, Australia
J. E. Stafford
Affiliation:
South Australian Department of Agriculture, Box 1671, GPO, Adelaide 5001, Australia
Get access

Abstract

The phenotypie associations between scores for various types of non-fleece pigmentation and concentration isolated pigmented wool fibres in the fleece (experiment 1 and 2) or the piebald phenotype (experiment 3) were studied in Corriedale hogget ewes. These sheep were selected on the basis of either degree of nose skin pigmentation (experiment 1), presence or absence of pigmented fibres at the horn sites (experiment 2) and presence or absence of the piebald phenotype (experiment 3). Among affected fleeces the concentration of isolated pigmented fibres (PFC) had high correlations (0·96 and 0·97) with the proportion of staples affected, which indicates that when PFC is high the isolated pigmented fibres are widely distributed throughout the fleece. Three types of non-fleece pigmentation had significant (P < 0·05) positive correlations with PFC in experiments 1 and 2. These were pigmented skin on the nose lips (0·23 and 0·18; P < 0·05), pigmented fibres at the horn sites (0·34 and 0·30; P < 0·01) and pigmented fibres on the legs (0·36 and 0·29; P < 001). The pigmentation of skin or fibres in non-fleece areas was predominantly black/grey and there were usually significant (P < 0·05) positive correlations between the various types of non-fleece pigmentation. In experiment 3, piebald sheep were found to have higher scores for black/grey fibres on the ears (P < 0·001), face (P < 0·01) and horn sites (P < 0·05) and for black/grey skin under the tail (P < 0·01) than non-piebald sheep.

Type
Papers
Information
Animal Production , Volume 49 , Issue 2 , October 1989 , pp. 241 - 247
Copyright
Copyright © British Society of Animal Science 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Adalsteinsson, S. 1974. Colour inheritance in farm animals and its application in selection. Proceedings of First World Congress on Genetics Applied to Livestock Production, Madrid, Vol. I, pp. 29–37. Editorial Garsi.Google Scholar
Adalsteinsson, S., Dolling, C. H. S. and Lauvergne, J. J. 1980. Breeding for white colour in sheep. Agricultural Record, South Australian Department of Agriculture 7: (13), 40–43.Google Scholar
Australian Corriedale Association. 1965. The Corriedale — judging Corriedale sheep, a dual purpose breed. Australian Stud and Farm Monthly, June, pp. 1–8.Google Scholar
Body, E. M., Meager, J., Pennefather, H. F. and Simpson, G. K. 1962. Black or brown spots on Merinos: are they important? Pastoral Review 72: 621–623.Google Scholar
Brooker, M. G. 1968. Pigmentation in the Australian Merino. Master of Agriculture Science Thesis, University of Sydney.Google Scholar
Brooker, M. G. and Dolling, C. H. S. 1969a. Pigmentation of sheep. II. The inheritance of colour patterns in black Merinos. Australian Journal of Agricultural Research 20: 387–394.CrossRefGoogle Scholar
Brooker, M. G. and Dolling, C. H. S. 1969b. Pigmentation of sheep. III. Piebald patterns in Merinos. Australian Journal of Agricultural Research 20: 523–532.CrossRefGoogle Scholar
Cardellino, I. R. A. 1978. Incidence of pigmented fibres in Uruguayan wools. Boletin Technico, Secretariado Uruguayo de la Lana, No. 3, pp. 43–45.Google Scholar
Fleet, M. R. 1985. Pigmented fibres in white wool. Wool Technology and Sheep Breeding 33: 5–13. 27.Google Scholar
Fleet, M. R. and Foulds, R. A. 1989. Isolated pigmented fibres in fleeces and their tops. Wool Technology and Sheep Breeding 36: 76–81.Google Scholar
Fleet, M. R., Rogan, I. M., Ponzoni, R. W. and Stafford, J. E. 1987. The importance of non-fleece pigmentation on Merino sheep. In Merino Improvement Programs in Australia (ed. McGuirk, B. J.), Proceedings National Symposium, pp. 175–180. Australian Wool Corporation.Google Scholar
Fleet, M. R., Smith, D. H. and Siafford, J. E. 1989. Comparison of Merino sheep homozygous (WW) or heterozygous (Ww) for white fleece on the incidence of isolated pigmented wool fibres and types of non-fleece pigmentation. Australian Journal of Agricultural Research 40: 445–455.CrossRefGoogle Scholar
Fleet, M. R., Stafford, J. E. and Dolling, C. H. S. 1984. A note on the occurrence of isolated melanin pigmented fibres in the white fleece wool of Corriedale sheep. Animal Production 39: 311–314.Google Scholar
Foulds, R. A., Wong, P. and Andrews, M. W. 1984. Dark fibres and their economic importance. Wool Technology and Sheep Breeding 32: 91–100.Google Scholar
Graham, J. R. 1870. A Treatise on the Australian Merino. Mitchell Library, Sydney.Google Scholar
“Old Hand”. 1953. Black or brown spots on non-wool parts of a Merino sheep. Reprinted in Pastoral Review 72: 464–465.Google Scholar
Ryder, M. L. and Adalsteinsson, S. 1987. A note on the differences in coat structure between the black and white areas of piebald lambs. Journal of Agricultural Science, Cambridge 108: 379–382.CrossRefGoogle Scholar
Ryder, M. L. and Stephenson, S. K. 1968. Wool Growth, p. 288. Academic Press, London.Google Scholar
Snedecor, G. W. and Cochran, W. G. 1967. Statistical Methods 6th ed. Iowa State University Press, Iowa.Google Scholar