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Some wool follicle characteristics in crossbreds between Egyptian coarse wool sheep and long and fine-wool breeds

Published online by Cambridge University Press:  27 March 2009

M. T. Ragab  and
I. F. M. Marai
M. T. Ragab
Affiliation:
Department of Animal Breeding, Faculty of Agriculture, Cairo University
I. F. M. Marai
Affiliation:
Department of Animal Production, High Institute of Agriculture, Zagazig
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Summary

Internal and external follicle diameters of both primary and secondary follicles of Texel x Ossimi and Merino x Barki ewes were greater, at birth, than those in either respective parent breed; the density of primary follicles at birth was less in the cross-breds than in the parental breeds, for both crosses. There was a greater increase of follicle diameter with age in the Egyptian breeds, and mean follicle diameters of the crossbreds were intermediate between those of parent breeds at ages of 3–6 months and above.

Grading up Ossimi sheep with the Caucasian Merino resulted in progressive decrease of mean internal follicle diameter. The F2, with more merino blood, had a greater frequency of the smallest diameter follicles than had the F1.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 73 , Issue 2 , October 1969 , pp. 211 - 213
Copyright
Copyright © Cambridge University Press 1969

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References

REFERENCES

Burns, M. (1955). Observations on Merino x Hardwick hybrid sheep with special reference to fleece. J. agric. Sri., Camb. 46, 389–406.Google Scholar
Carter, H. B. (1955). The hair follicle group in sheep. Anim. Breed. Abstr. 23, 101–16.Google Scholar
Clarke, W. H. (1960). A histological technique for the study of the skin follicle population in sheep. Tech. Pap. Anim. Res. Labs C.S.I.R.O. Aust. 3, 92–7.Google Scholar
Daly, R. A. & Carter, H. B. (1955). The fleece growth of young Lincoln, Corriedale, Polwarth and Fine Merino maiden ewes under housed conditions and unrestricted and progressively restricted feeding on a standard diet. Aust. J. agric. Res. 6, 476–513.Google Scholar
Fraser, A. S. & Hamada, M. K. O. (1952). Observations on the birthcoats and skins of several breeds and crosses of British sheep. Proc. R. Soc. Edinb. 64, 462–77.Google Scholar
Hunt, H. R., Ghanem, Y. S., Lawson, C. A. & Brwon, J. A. (1952). Wool characteristics, growth and skin folds in a cross between Rambouillet and Black Top Delaine sheep. Mich. Agri. Exp. Sta. 35, 52.Google Scholar
Marai, I. F. M. & Shafei, M. M. (1964). The ‘Postnatal check’ in the development of the wool follicles. J. anim. Prod. U.A.R. 4 (2), 145–50.Google Scholar
Rae, A. L. (1952 a). Crossbreeding of sheep. Anim. Breed. Abstr. 20, 197–207.Google Scholar
Rae, A. L. (1952 b). Crossbreeding of sheep. II. Crossbreeding of lamb and mutton production. Anim. Breed. Abstr. 20, 287–99.Google Scholar
Ragab, M. T., Asker, A. A. & Ghoneim, K. (1956). Effect of crossing two breeds of Egyptian sheep on wool characteristics. Emp. J. exp. Agric. 24, 307.Google Scholar
Teodoreanu, N. & Derlogea, V. (1955). A histological study of the skin of F1 Tsigai × Turcana in relation to fibre fineness. Bull. Sti. Biol. 7, 1145–66.Google Scholar