Hostname: page-component-7479d7b7d-t6hkb Total loading time: 0 Render date: 2024-07-08T11:31:42.843Z Has data issue: false hasContentIssue false
  • English
  • Français

The association between kemp and some vigour and wool characteristics in Barki and Merino Barki cross

Published online by Cambridge University Press:  27 March 2009

R. A. Guirgis  and
E. Salah E. Galal
R. A. Guirgis
Affiliation:
Wool Laboratory, Department of Animal Research, Desert Institute, Matareya, Cairo, Egypt
E. Salah E. Galal
Affiliation:
Wool Laboratory, Department of Animal Research, Desert Institute, Matareya, Cairo, Egypt
Get access Rights & Permissions [Opens in a new window]

Summary

Data were collected from 549 Barki and Merino cross sheep during 1967, 1968 and 1969 to study the relation between kemp production and body vigour. The study also included the staple length and greasy fleece weight. The results showed that:

Age had a marked effect on the traits studied. Whereas kemp frequency (score) declined slightly as age proceeded, showing a significant reduction in the seventh shearing season, the staple length and fleece weight decreased after the second shearing season.

Differences due to sex, year and breed occurred, though the pattern differed in the different traits.

Kemp showed a highly significant correlation with birth and weaning weights, as indicating the animal vigour, and was negatively correlated with fleece weight.

Staple length was negatively correlated with birth and weaning weights and positively correlated with fleece weight.

Fleece weight was positively correlated to birth and weaning weights and negatively correlated to kemp score.

Kemp score in the Barki sheep was shown to be quite repeatablo (repeatability = 0·5).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 78 , Issue 3 , June 1972 , pp. 345 - 349
Copyright
Copyright © Cambridge University Press 1972

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

Brown, G. H., Turner, H. N., Young, S. S. Y. & Dolling, C. H. S. (1966). Vital statistics for an experimental flock of Merino sheep. III. Factors affecting fleece and body characteristics including the effect of age of ewe and its possible interactions with methods of selection. Aust. J. agric. Res. 17, 557–81.CrossRefGoogle Scholar
Chapman, R. E. (1960). The biology of the fleece. Tech. Pap. Anim. Res. Labs. C.S.I.R.O. Aust., no. 3.Google Scholar
Deshpande, A. K. (1948). Studies on the biology of the fleece of the Scots Mountain Blackface lamb. Ph.D. Thesis, University of Leeds.Google Scholar
Dry, F. W. (1931). The use of covers on lambs in biological work on wool. Nature, Lond. 127, 482.CrossRefGoogle Scholar
Dry, F. W. (1933). Hairy fibres of the Romney sheep. N.Z. Jl Agric. 46, 10–22.Google Scholar
Dry, F. W. (1964). Lamb fibre types. Biology of the skin and hair growth. Proc. of a Symposium, Canberra, Aust. pp. 89–104.Google Scholar
Duncan, D. B. (1955). Multiple range and multiple F tests. Biometrics 11, 1–42.CrossRefGoogle Scholar
Fahmy, M. H., Galal, E. Salah E., Ghanem, Y. S. & Khishin, S. S. (1969 a). Crossbreeding of sheep under semi-arid conditions. Anim. Prod. 11, 351–60.Google Scholar
Fahmy, M. H., Galal, E. Salah E., Ghanem, Y. S. & Khishin, S. S. (1969 b). Genetic parameters of Barki sheep raised under semi-arid conditions. Anim. Prod. 11, 361–7.Google Scholar
Fraser, A. S. & Short, B. R. (1960). The biology of the fleece. Tech. Pap. Anim. Res. Labs. C.S.I.R.O. Aust. no. 3.Google Scholar
Ghanem, Y. S. (1965). Wool studies of crossbred Merino x Barki sheep living under desert conditions. Bull. Inst. Desert, U.A.R., T. xv, no. 1, 33–53.Google Scholar
Guirgis, R. A. (1967 a). The inheritance of birthcoat characters in Barki, Merino and their crosses. E. Afr. agric. For. J. 32, 305–9.CrossRefGoogle Scholar
Guirgis, R. A. (1967 b). Fibre-type arrays and kemp succession in sheep. J. agric. Sci., Camb. 68, 75–85.CrossRefGoogle Scholar
Kadry, A. H. (1971). Heritability and repeatability of some physical wool characteristics of Barki. M.Sc. Thesis, Al Azhar University, Cairo.Google Scholar
Lyne, A. G. (1961). Postnatal development of wool follicles, shedding and skin thickness in inbred Merino and Southdown–Merino crossbred sheep. Aust. J. biol. Sci. 14, 141–56.CrossRefGoogle Scholar
Mabrouk, M. M. S. (1970). Studies on the reproductive performance of sheep under coastal desert conditions. M.Sc Thesis, Al Azhar University, Cairo.Google Scholar
Mullaney, P. D., Brown, G. H., Young, S. S. Y. & Hyland, P. G. (1969). Genetic and phenotypic parameters for wool characteristics in fine wool Merino, Corriedale and Polwarth sheep. I. Influence of various factors on production. Aust. J. agric. Res. 20, 1161–76.CrossRefGoogle Scholar
Purser, A. F. & Karam, H. A. (1967). Lamb survival, growth and fleece production in relation to birthcoat type among Welsh Mountain sheep. Anim. Prod. 9, 75–85.Google Scholar
Riches, J. H. (1958). Report on a survey of Merino sheep husbandry and wool production in eastern Australia. C.S.I.R.O. Aust. Div. Anim. Hlth. Div. Rep. no. 7.Google Scholar
Ross, J. M. & Wright, G. M. (1954). Kemp succession in N-type sheep. Aust. J. agric. Res. 5, 503–10.CrossRefGoogle Scholar
Ryder, M. L. (1962). Why do animals moult? New Scient. 13, 266–9.Google Scholar
Ryder, M. L. & Stephenson, S. K. (1968). Wool Growth. Academio Press.Google Scholar
Shelton, Maurice. (1964). Relations of birth weight to death losses and to certain characters of fall-born lambs. J. Anim. Sci. 23, 355–9.CrossRefGoogle Scholar
Slee, J. (1959). Fleece shedding, staple length and fleece weight in experimental Wiltshire Horn Scottish Blackface sheep crosses. J. agric. Sci., Camb. 53, 209–23.CrossRefGoogle Scholar
Slee, J. & Carter, H. B. (1962). Fibre shedding and fibre-follicle relationships in the fleeces of Wiltshire Horn x Scottish Blackface sheep crosses. J. agric. Sci., Camb. 58, 309–26.CrossRefGoogle Scholar
Turner, H. N., Brown, C. H. & Ford, G. H. (1968). The influence of age structure on total productivity in breeding flocks of Merino sheep. I. Flocks with a fixed number of breeding ewes producing their own replacements. Aust. J. agric. Res. 19, 443–75.CrossRefGoogle Scholar
Young, S. S. Y. & Chapman, R. E. (1958). Fleece characters and their influence on wool production per unit area of skin in Merino sheep. Aust. J. agric. Res. 9, 363–72.CrossRefGoogle Scholar