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Comparison of the response of secondary hair follicles of cashmere and angora goats to prolactin and melatonin in vitro

Published online by Cambridge University Press:  21 November 2017

M. Ibraheem ,
H. Galbraith  and
J.R. Scaife
M. Ibraheem
Affiliation:
Department of Agriculture, University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD, UK.
H. Galbraith
Affiliation:
Department of Agriculture, University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD, UK.
J.R. Scaife
Affiliation:
Department of Agriculture, University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD, UK.
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Extract

Angora and Cashmere goats produce two distinctive major fibres. The hair coat of the Angora goat consists essentially of a single fleece of Mohair grown by secondary hair follicles with a limited production of guard hair from primary follicles. The average fibre diameter ranges from 22 to 45 urn. In contrast, the Cashmere bearing goat has a double coat comprising coarse guard hair produced by primary follicles with the fine cashmere underhair (preferably 19 μm diameter or less) produced by secondary hair follicles. In the Angora goat, the fibres grow essentially continuously while in cashmere, hair follicle activity is determined largely by seasonal changes in photoperiod. The objective of this study was to investigate the effects of prolactin and melatonin, hormones implicated in the photoperiodic response, on the pattern of growth of secondary hair follicles isolated and maintained in vitro.

Type
Sheep, Goats and Deer
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1994 , March 1994 , pp. 218
Copyright
Copyright © The British Society of Animal Production 1994

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References

Ibraheem, M.F., Galbraith, H., Scaife, J.R., Ewen, S. (1992). Journal of Reperoduction and Fertility. Abstract Series 10, 72.Google Scholar
Ibraheem, M.F., Galbraith, H., Scaife, J.R., Ewen, S. (1993a). Journal of Anatomy 182, 231–238.Google Scholar
Ibraheem, M.F., Galbraith, H., Scaife, J.R. Ewen, S. (1994). Growth of secondary hair follicles of the Cashmere goat in vitro and their response to prolactin and melatonin. Journal of Anatomy (Submitted).Google Scholar