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SITUATION OF INBREEDING IN A RETINTO POPULATION

Published online by Cambridge University Press:  01 August 2011

I. Serrano ,
M. Mayer ,
A. Rodero  and
J. M. Jimenez
I. Serrano
Affiliation:
Department of Genetics, Veterinary Faculty, University of Cordoba, Cordoba, SPAIN
M. Mayer
Affiliation:
Department of Animal Production, University of Nairobi, P.O. Box 29053, Nairobi, KENYA
A. Rodero
Affiliation:
Department of Genetics, Veterinary Faculty, University of Cordoba, Cordoba, SPAIN
J. M. Jimenez
Affiliation:
Research Centre of Agricultural Animal Husbandry, Cadiz, SPAIN
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Summary

The degree of inbreeding was studied for a subpopulation of the beef cattle breed Retintofrom the Cadiz Province in Andalusia (Spain). The pedigree information from 492 female and 25 male breeding animals was analyzed. On the basis of the available information, only the current inbreeding, that is the inbreeding with consideration of three ancestral generations, could be calculated. While close inbreeding is purposely avoided with the bulls, it is of great importance in cows. The average coefficient of inbreeding for cows born inthe years 1982 to 1987 was o 2.35 /;o, although in the great-grandparent generation only 55% of the ancestors were known. Inbreeding was discovered in 17.7% of the cows; 5.8%of the cows had an inbreeding coefficient of 25%. The rate of inbreeding per generation is very high in comparison with other beef cattle breeds and above all in comparison with dual purpose cattle. Because of the manner in which the bulls are used, also considerablenon-current inbreeding has to be expected.

Resumen

Se ha estudiado el grado de consanguinidad en una subpoblaci ôn de la raza bovina de carne Retinto en la provincia andaluza de Câdiz (Espana). Se ha analizado la informaciôn de ascenizencia de 492 hembras y 25 machos seleccionados. Sobre la base de la informaciôn disponible, ûnicamente la consanguinidad corriente, es decir la consanguinidad referida a las tres generaciones pasadas, podrf a ser calculada. Mientras una consanguinidad elevada no es importante para los toros, resulta de gran importanciapara las vacas. El coeficiente medio de consanguinidad para las vacas nacidas entre 1982 y 1987 era de 2.35%, mientras que sôlo se conocfa el 55% de los progenitores en la generaciôn de los bisabuelos. Se ha encontrado consanguinidad en el 17.7% de las vacas; el 5.8% de la vacas resultô tener un coeficiente de consanguinidad del 25%. Latasa de consanguinidad por generaciôn es muy alta en comparaciôn con otras razas de vacuno de carne, y sobre todo en comparaciôn con los vacunos de doble propôsito. Debido a la forma en que se usan los toros, también debe resaltarse unaconsanguinidad poco corriente.

Type
Research Articles
Information
Animal Genetic Resources/Resources génétiques animales/Recursos genéticos animales , Volume 17 , April 1996 , pp. 87 - 93
Copyright
Copyright © Food and Agriculture Organization of the United Nations 1996

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References

REFERENCES

Barker, J. S. F. and Davey, G. P. 1960. The breed structure and genetic analysis of the pedigree cattle breeds in Australia. II. The Poll Hereford. Aust. J. Agric. Res. 11, p. I 072–1100.CrossRefGoogle Scholar
Bollmeier, S., Mayer, M. and Simon, D. 1991. Entwicklung der genetischen Struktur beim württembergischen Braunvieh. Ziüchtungskunde 63, p. 1–11.Google Scholar
Davey, G. P. and Barker, J. S. F. 1963. The breed structure and genetic analysis of the pedigree cattle breeds in Australia. III. The Hereford. Aust. J. Agric. Res. 14, p. 93=118.CrossRefGoogle Scholar
Hudson, G. F. S., Quaas, R. L. and Van Vleck, L. D. 1982. Computer algorithm for the recursive method of calculating large numerator relationship matrices. J. Dairy Sci. 65, p. 2018–2022.CrossRefGoogle Scholar
Kidd, K. K., Stone, W. H., Crimella, C., Carenzi, C., Casati, M. and Rognoni, G. 1980. Immunogenetic and population genetic analyses of Iberian Cattle. Anim. Blood Grps. biochezn. Genet. 11, p. 21–38.CrossRefGoogle ScholarPubMed
Lush, J. L. 1934. A herd of cattle bred for twenty years without new blood. J. Heredity 25, p. 208–216.CrossRefGoogle Scholar
McPhee, H. and Wright, S. 1926. Mendelian analysis of the pure breeds of livestock. IV. The British Dairy Shorthorns. J. Heredity 17, p. 397–401.CrossRefGoogle Scholar
McPhee, H. and Wright, S. 1925. Mendelian analysis of the pure breeds of livestock. III. The Shorthorns. J. Heredity 16, p. 205–215.CrossRefGoogle Scholar
Ozkütük, K. and Bichard, M. 1977. Studies of pedigree Hereford cattle breeding. I. Herdbook analyses. Anim. Prod. 24, p. 1–13.Google Scholar
Quaas, R. L. 1976. Computing the diagonal elements of a large nuznerator relationship matrix. Biometrics 32, p. 949–953.CrossRefGoogle Scholar
Rodero, A., Molina, A., Serrano, I., Burgos, A., Mayer, M., Salado, F. and Jimenez, J. M. 1992a. Caracterizaciô n productiva de la raza vacuna Retinta. Archivos de Zootecnia 41 p. 579–586.Google Scholar
Rodero, A., Molina, A., Burgos, A., Serrano, I., Mayer, M., Jimenez, J. M. and Salado, F. 1992b. Actuality and future of a breeding programme in Retinto beef cattle. Archivos de Zootecnia 41, p. 569–572.Google Scholar
Schmidt, T. 1990. Analyse der westfälischen Rotbuntzucht bezüglich Inzucht, Verwandtschaft Frezndgenanteil, Generationsintervall und Zuchtfortschritt. Diss. agr. Bonn.Google Scholar
Schmidt, T., Mayer, M. and Simon, D. 1993. Analyse der westfälischen Rotbuntzucht bezüglich Inzucht, Verwandtschaft und Fremdgenanteil. Züchtungskunde 65, p. 102–11 I.Google Scholar
Schmidt, T., Mayer, M. and Simon, D. 1986. Inzucht, Verwandtschaft und Genanteile in der rheinischen Schwarzbuntzucht. Annual Meeting of DGfZ and GfT in Hannover, Germany, 1986.Google Scholar
Stonaker, H. H. 1951. A uniqué herd of Hereford cattle. J. Heredity 42, p. 207–209.CrossRefGoogle Scholar
Stonaker, H. H. 1943. The breeding structure of the Aberdeen-Angus breed. J. Heredity 34, p. 323–328.Google Scholar
Watson, J. H. 1963. Inbreeding arising through artif cial insemination and natural service in Welsh Black cattle. Anim. Prod. 5, p. 209–214.Google Scholar
Willham, O. S. 1937, A. genetic history of Hereford cattle in the United States. J. Heredity 28, p. 283–294.CrossRefGoogle Scholar
Wright, S. 1923. The Duchess family of Shorthorns as bred by Thomas Bates. J. Heredity 14, p. 405–422.CrossRefGoogle Scholar