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Genetic parameters of Barki sheep raised under semi-arid conditions

Published online by Cambridge University Press:  02 September 2010

M. H. Fahmy ,
E. Salah E. Galal ,
Y. S. Ghanem  and
S. S. Khishin
M. H. Fahmy
Affiliation:
Department of Animal Research, Desert Institute, Matareya, Cairo, Egypt
E. Salah E. Galal
Affiliation:
Department of Animal Research, Desert Institute, Matareya, Cairo, Egypt
Y. S. Ghanem
Affiliation:
Department of Animal Research, Desert Institute, Matareya, Cairo, Egypt
S. S. Khishin
Affiliation:
Department of Animal Research, Desert Institute, Matareya, Cairo, Egypt
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Summary

Records on 695 lambs were collected over a period of 5 years from 1961/62 to 1965/66, at Ras El-Hekma Desert Research Station, 230 km west of Alexandria. The characters studied were birth, weaning and yearling body weights, pre- and post-weaning daily gains and greasy fleece weight.

Birth, 120-day and 365-day body weights were 3·4, 18·2 and 33·4 kg respectively. Greasy fleece weight at 16 months of age was 3·29 kg. Heritability estimates of birth, weaning, yearling weights, pre- and post-weaning daily gains and greasy fleece weight were 0·22, 0·45, 0·41,0·45 and 0·29 respectively. Genetic and phenotypic correlations between birth, weaning and yearling weights were all positive and significant. Genetic correlations between fleece weight and body characteristics were negative and low.

Type
Research Article
Information
Animal Production , Volume 11 , Issue 3 , August 1969 , pp. 361 - 367
Copyright
Copyright © British Society of Animal Science 1969

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References

REFERENCES

Ali, K. T. 1952. The heritability of, and the effects of some environmental factors on the birth weight, the weaning weight and the grease fleece weight of sheep. Univ. Minn. Publ. 3434 (Abstr. in Anim. Breed. Abstr. 21: No. 1318).Google Scholar
Awad, A. B. 1966. Effect of crossing Merino and Barki sheep on some wool characteristics. M.Sc. Thesis, Ain Shamas Univ., Cairo.Google Scholar
Bassett, J. W., Cartwright, T. C., Van Horn, J. L. and Willson, F. S. 1967. Estimates of genetic and phenotypic parameters of weanling and yearling traits in range Rambouillet ewes. J. Anim. Sci. 26: 254–260.CrossRefGoogle Scholar
Bowman, J. C. and Broadbent, J. S. 1966. Genetic parameters of growth between birth and sixteen weeks in Down cross sheep. Anim. Prod. 8: 129–135.Google Scholar
Botkin, M. P. 1955. Selection for efficiency of gain in lambs. J. Anim. Sci. 14: 1176 (Abstr.).Google Scholar
Carter, R. C. and McClure, W. H. 1962. Heritability of growth rate and grade in Hampshire lambs. J. Anim. Sci. 21: 970 (Abstr.).Google Scholar
El-Tawil, E. A. 1965. Genetic and environmental factors of sheep under arid conditions. Ph.D. Thesis, Iowa State Univ., Ames.Google Scholar
Fahmy, M. H. 1967. Genetic and environmental factors affecting sheep production under desert conditions. Ph.D. Thesis, Ain Shams Univ., Cairo.Google Scholar
Fahmy, M. H., Galal, E. S. E., Ghanem, Y. S. and Khishin, S. S. 1969. Crossbreeding of sheep under semi-arid conditions. Anim. Prod. 11: 351–360.Google Scholar
Galal, E.Salah, E. 1968. Estimates of genetic parameters of growth rate in sheep with reference to the method of estimation. Anim. Prod. 10: 109–112.Google Scholar
Ghanem, Y. S. 1965. Wool studies of crossbred Merino × Barki sheep under desert conditions. Bull. Inst. Désert d'Egypt 15 (1): 33–53.Google Scholar
Ghanem, Y. S., Fahmy, M. H., Seoudi, A. M. and Farid, M. F. A. 1963. Some observations on the reproductive behaviour of local and imported breeds of sheep under desert conditions. Proc. 4th Egypt. Vet. Congr., Cairo. (In press.)Google Scholar
Ghanem, Y. S., Fahmy, M. H. and El-Issawi, H. F. 1964. A study of some body measurements in a cross between Merino and Barki sheep living under desert conditions. II. Weaning and yearling measurements. Bull. Inst. Désert d'Egypt 14 (2): 45–55.Google Scholar
Hazel, L. N. and Terrill, C. E. 1945. Effects of some environmental factors on weaning traits of range Rambouillet lambs. J. Anim. Sci. 4: 331–341.CrossRefGoogle Scholar
Hundley, W. S. and Carter, R. C. 1956. Heritability of growth rate and market grade in mutton lambs. J. Anim. Sci. 14: 1126 (Abstr.).Google Scholar
Kassab, S. A. and Karam, H. A. 1961. Effect of some environmental factors on body fleece weights of Barki sheep. J. Anim. Prod. U.A.R. 1: 149–167.Google Scholar
Kempthorne, O. 1957. An introduction to genetic statistics, p. 264. John Wiley and Sons Inc, New York.Google Scholar
Labban, F. and Radman, A. 1963. The effect of crossing Egyptian sheep with Merino on live weight of lambs. Proc. 2nd Anim. Prod. Conf., Cairo, pp. 47–60.Google Scholar
MacNaughton, W. N. 1956. Repeatability and heritability of birth, weaning and shearling weights among range sheep in Canada. Ph.D. Thesis, Iowa State Univ., Ames (Abstr. in Anim. Breed. Abstr. 25: No. 1926).Google Scholar
Morley, F. H. W. 1955. Selection for economic characters in Australian Merino sheep. v. Further estimates of phenotypic and genetic parameters. Aust. J. agric. Res. 6: 77–90.CrossRefGoogle Scholar
Osman, A. H. and Bradford, G. E. 1965. Effects of environment on phenotypic and genetic variation in sheep. J. Anim. Sci. 24: 766–774.CrossRefGoogle ScholarPubMed
Ragab, M. T., Asker, A. A. and Kadi, M. R. 1953. Genetic factors affecting weights of Ossimi lambs. Emp. J. exp. Agric. 21: 304–308.Google Scholar
Ragab, M. T. and Ghoneim, K. I. 1961. Wool characteristics of Barki sheep. J. Anim. Prod. U.A.R. 1: 23–36.Google Scholar
Seoudy, A. M. 1966. Effect of crossing Merino and Barki sheep on some wool characteristics. M.Sc. Thesis, Ain Shams Univ., Cairo.Google Scholar
Yao, T. S., Simmons, V. L. and Schott, R. G. 1953. Heritability of birth weight and weaning weight of lambs. J. Anim. Sci. 12: 431–439.CrossRefGoogle Scholar