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Genetic and phenotypic aspects of doe productivity in four breeds of rabbits

Published online by Cambridge University Press:  27 March 2009

M. H. Khalil ,
E. A. Afifi ,
M. E. Emara  and
J. B. Owen
M. H. Khalil
Affiliation:
Department of Animal Production, Faculty of Agriculture at Moshlohur, Zagazig University
E. A. Afifi
Affiliation:
Department of Animal Production, Faculty of Agriculture at Moshlohur, Zagazig University
M. E. Emara
Affiliation:
Animal Production Research Institute, Ministry of Agriculture, Cairo, Egypt
J. B. Owen
Affiliation:
Centre for Arid Zone Studies, University College of North Wales, Bangor, Gwynedd, LL57 2UW
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Summary

Data on 841 purebred Bauscat, White Flander, Giza White and Baladi Red litters provided estimates of genetic, phenotypic and environmental parameters for gestation length, litter size at birth and at weaning, mortality and sex ratio at weaning. A total of 170 daughters (paternal half-sisters) of 76 sires were available for the analysis. No important differences were detected among breeds for litter traits studied except litter size at weaning (P < 0·001). Year of kindling affected (P < 0·001) gestation length, litter size at birth and mortality percentage. No clear patterns of the effect of parity and month of kindling on litter traits were observed. The sire of the doe and doe within sire affected most of the traits studied. Estimates of heritability indicated that the sire's genetic contribution to litter traits are much higher during the pre-natal period than for the suckling period. Estimates of repeatability for litter traits studied were relatively low. Genetic and phenotypic correlations between gestation length and other litter traits were relatively low. Litter size traits were positively correlated both genetically and phenotypically. Estimates of genetic and phenotypic correlation between litter size traits and preweaning mortality were generally negative. Phenotypic and environmental correlations were generally very similar in size and sign. Predicted direct selection was shown to give greater improvement in litter size at birth than indirect selection through litter size at weaning.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 110 , Issue 1 , February 1988 , pp. 191 - 197
Copyright
Copyright © Cambridge University Press 1988

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References

Ann, E. A., Abdella, M. M. M., El-Serafy, A. M. & El-Sayaad, G. A. (1982). Litter traits as affected by feeding urea, breed group and other non-genetic factors. 1th International Congress for Statistics, Computer Science, Social and Demographic Research, Ain Shams University, Cairo, 03 1982.Google Scholar
Afifi, E. A. & Emara, M. E. (1985). Pregnancy duration for purebred and crossbred litters in rabbits. Journal of Applied Rabbit Research 8, (4), 158–160.Google Scholar
Afifi, E. A. & Emara, M. E. (1986a). Analysis of litter size in rabbits in a diallel crossing scheme involving four local Egyptian and exotic breeds. Second Egyptian – British Conference, Bangor, U.K., 08 1986.Google Scholar
Afifi, E. A. & Emara, M. E. (1986b). Tertiary sex ratio within litter in rabbits. Vllth Conference of Egyptian Society of Animal Production, Cairo, 16–18 09 1986.Google Scholar
Afifi, E. A., Galal, E. S. E., El-Oksh, H. A. & Kadry, A. E. (1980). Inter-relationships among doe's weight, litter size, litter weight and body weight at different ages in rabbits. Egyptian Journal of Animal Production 20 (2), 127–136.Google Scholar
Afifi, E. A., Galal, E. S. E., El-Tawil, A. E. & El-Khishin, S. S. (1976). Litter size at birth and at weaning in three breeds of rabbits and their crosses. Egyptian Journal of Animal Production 16, 109–119.Google Scholar
Afifi, E. A., Galal, E. S. E. & Kadry, A. E. H. (1982). The effect of breed and some environmental factors on litter traits in rabbits. 7th International Congress for Statistics, Computer Science, Social and Demographic Research, Ain Shams University, Cairo, 03 1982.Google Scholar
Baselga, M., Blasco, A. & Garcia, F. (1982). Genetic parameters for economic traits in rabbit populations. In 2nd World Congress on Genetics Applied to Livestock Production, Madrid, Spain, 10 1982.Google Scholar
El-Khishin, A. F., Badreldin, A. L., Oloufa, M. M. & Kheireldin, M. A. (1951). Growth development and litter size in two breeds of rabbits. Bulletin No. 2, Faculty of Agriculture, Cairo University, Egypt.Google Scholar
El-Tawil, E. A., Khishin, S. S., Galal, E. S. & Afifi, E. A. (1971). Some aspects of production in three breeds of rabbits and their crosses. III. Observations on gestation duration. Abstracts of the 4th Conference of Animal Production, Alexandria, Egypt, 08 1971.Google Scholar
Falconer, D. S. (1981). Introduction to Quantitative Genetics, 2nd edn.New York: Longman.Google Scholar
Garcia, F., Blasco, A., Baselga, M. & Salvador, A. (1980). Genetic analysis of some reproductive traits in meat rabbits. Proceedings of the 2nd World Rabbit Congress, Barcelona, Spain, 04 1980.Google Scholar
Harvey, W. R. (1977). User's Guide for LSML16, Mixed Model Least-Squares and Maximum Likelihood Computer Program. Mimeo, Ohio State University, U.S.A.Google Scholar
Henderson, C. R. (1953). Estimation of variance and covariance components. Biometrics 9, 226–252.CrossRefGoogle Scholar
Hulot, F. & Matheron, G. (1979). Analysis of genetic variation among 3 rabbit breeds for litter size and its components after a postpartum mating. Annales de Génétique et Sélection Animate 11 (1), 53–77.CrossRefGoogle Scholar
Kadry, A. E. H. & Afifi, E. A. (1982). Male percent per litter weaned in some pure and cross breeds of rabbits. 1th International Congress for Statistics, Computer Science, Social and Demographic Research, Ain Shams University, Cairo, 03 1982.Google Scholar
Kadry, A. E. H. & Afifi, E. A. (1984). Heritability estimates of litter traits in Bauscat rabbits. Al-Azhar Journal of Agricultural Research 1, 24–30. Al Azhar University, Egypt.Google Scholar
Khalil, M. H. & Afifi, E. A. (1986). Doe litter performance of Bauscat and Giza White rabbits. Second Egyptian-British Conference, Bangor, U.K., 08 1986.Google Scholar
Khalil, M. H., Owen, J. B. & Afifi, E. A. (1987). A genetic analysis of litter traits in Bauscat and Giza White rabbits. Animal Production 45, 123–134.Google Scholar
Lahiri, S. S. & Mahajan, J. M. (1982). Note on the inheritance of age at first breeding, litter size and weight in rabbits. Indian Journal of Animal Science 52 (11), 1148–1150.Google Scholar
Lampo, P. & Broeck, L. (1975). The influence of the heritability of some breeding parameters and the correlation between these parameters with rabbits. Archiv für Geflügelkunde 39 (6), 208–211.Google Scholar
Lukefahr, S. (1982). Evaluation of rabbit breeds and crosses for overall commercial productivity. Ph.D. thesis, Oregon State University, Corvallis, U.S.A.Google Scholar
Randi, E. (1982). Productivity traits in two rabbit breeds: New Zealand White and Californian. Animal Breeding Abstracts 52, 2859.Google Scholar
Randi, E. & Scossiroli, R. E. (1980). Genetic analysis of production traits in Italian New Zealand White and California pure-breed populations. 2nd World Rabbit Congress, Barcelona, Spain. 04 1980.Google Scholar
Rollins, W. C., Casady, R. B., Sittmann, K. & Sittmann, D. B. (1963). Genetic variance component analysis of litter size and weaning weight of New Zealand White rabbits. Journal of Animal Science 22 (3), 654–657.CrossRefGoogle Scholar
Rouvier, R. (1979). Physiological effects of selection on the aspects of ponderal and numerical productivity in domestic rabbits. Proceedings of a Symposium held at Harrogate, Commonwealth Agricultural Bureaux, U.K., 07 1979.Google Scholar
Rouvier, R., Poujardieu, B. & Vrillon, J. L. (1973). Statistical analysis of the breeding performance of female rabbits: environmental factors, correlations and repeatabilities. Annales de Génétique et Sélection Animate 5 (1), 83–107.CrossRefGoogle Scholar
Swiger, L. A., Harvey, W. R., Everson, D. O. & Gregory, K. E. (1964). The variance of intraclass correlation involving groups with one observation. Biometrics 20, 818–826.CrossRefGoogle Scholar