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Post-natal follicle development and fleece changes in two selection lines of Scottish Blackface sheep

Published online by Cambridge University Press:  02 September 2010

M. L. Ryder
M. L. Ryder
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
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Summary

Fleece and skin samples were taken at intervals from birth to 86 days from Scottish Blackface lambs born into one line selected for hairiness, another for fineness and an unselected control line. The birthcoats in the Hairy line were longer than those in the Fine line, and had a predominance of Plateauo and Pi fibre type arrays, whereas P2 and P3 arrays predominated in the Fine line. The Hairy group had significantly more halo hairs and hairy-tip curly-tip fibres, but significantly fewer histerotrichs.

Most secondary follicles had fibres by 56 days, and development appeared to be faster in the Control than in the other two groups. The Hairy and Control groups had consistently high percentages of primary medullation, whereas the Fine group had a peak at 14 days. The Fine group had consistently low secondary medullation, whereas it increased in the Hairy and Control lambs, apart from a set-back at 28 days.

Up to 56 days the Fine group had no fibre shedding in the skin, and the Hairy group had most, although the incidence in any sample was less than 2%. There was more follicle inactivity at 86 days, and the Fine group then had most.

Type
Research Article
Information
Animal Production , Volume 18 , Issue 2 , April 1974 , pp. 169 - 177
Copyright
Copyright © British Society of Animal Science 1974

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References

REFERENCES

Burns, M. 1953. Observations on the follicle population of Blackface sheep. J. agric. Sci. Camb. 43: 422–431.CrossRefGoogle Scholar
Deshpande, A. K. 1948. Studies on the biology of the fleece of the Scots Blackface Mountain lamb. Ph.D. Thesis, University of Leeds.Google Scholar
Dry, F. W. 1965. Lamb fibre types. In Biology of Skin and Hair Growth (ed. Lyne, A. G. and Short, B. F.), pp. 89–104. Angus and Robertson, Sydney.Google Scholar
Peart, J. N. and Ryder, M. L. 1954. Some observations on different fleece types in Scottish Blackface sheep. J. Text. Inst. 45: 821–827.CrossRefGoogle Scholar
Pilkington, J. M. and Purser, A. F. 1958. Fibre medullation in Blackface lambs and hoggs. J. agric. Sci., Camb. 51: 257–264.CrossRefGoogle Scholar
Purser, A. F. 1967. Selection experiments with hill sheep. Proc. 9th int. Congr. Anim. Prod., Edinburgh. 1966, pp. 32–38.Google Scholar
Ryder, M. L. 1970. Post-natal fleece development in some primitive sheep and crosses. Z. Tierzucht. ZuchtBiol. 86: 371–391.Google Scholar
Ryder, M. L. and Stephenson, S. K. 1968. Wool Growth. Academic Press, London.Google Scholar
Side, H. J. A. 1964. Fibre growth rate changes in foetus, lamb and ewe. Ph.D. Thesis, University of Leeds.Google Scholar