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Polledness and intersexuality in the Damascus breed of goat

Published online by Cambridge University Press:  02 September 2010

John Hancock
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
Avraam Louca
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
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Summary

Data on 2208 parturitions involving 3594 kids were used to study the inheritance of polledness and its relationship with intersexuality in the Damascus breed of goat.

The percentage of horned kids in the offspring of polled × polled and horned × horned matings was 26·8 and 100·0, respectively. The corresponding value for matings having one parent horned was 50·3%.

There was a consistent excess of males in the sex ratios. Males comprised 53·8, 52·4, 60·2 and 54·0% of the offspring of polled x polled, polled x horned, horned x polled and horned × horned matings respectively. The corresponding proportions for the intersexes were 6·2, 0·3, 0·0 and 0·0%. The incidence of intersexes was not affected by type of birth (single, twin or multiple) or sex of littermates.

It was concluded that the data from the Damascus breed of goat conform with the current theory on the behaviour of the P gene concerning polledness (direct dominant effect) and intersexuality (pleiotropic recessive effect) in the Swiss breeds of goat.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1975

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References

REFERENCES

Bilgemre, K. and Duzgunes, O. 1952. Homlessness in Angora goat. Z. Tierziicht. ZuchtBiol. 60: 282284.Google Scholar
Epstein, H. and Herz, A. 1964. Fertility and birth weights of goats in a subtropical environment. J. agric. Sci., Camb. 62: 237244.Google Scholar
Ilbery, P. L. T. and Williams, D. 1967. Evidence of the freemartin condition in the goat. Cytogenetics 6: 276285.Google Scholar
Laor, M., Barnea, R., Huguette, A. and Soller, M. 1962. Polledness and hermaphroditism in Saanen goats. Israeli, agric. Res. 12: 8388.Google Scholar
Lauvergne, J. J. 1969. Progres des connaissances genetiques sur I'intersexualit associee a l'absence de cornes chez la chevre d'origine Alpine. Annls Genet. Sel. anim. 1: 403412.Google Scholar
Mason, I. L. 1969. A World Dictionary of Livestock Breeds, Types and Varieties. Commonwealth Agricultural Bureaux, Farnham Royal, Bucks.Google Scholar
Padeh, B., Wysoki, M., Ayalon, N. and Soller, M. 1965. An XX/XY hermaphrodite in the goat. Israel J. Med. Sci. 1: 10081012.Google Scholar
Ricordeau, G. 1969. Sur prolificite des genotypes sans cornes dans les races caprines Alpine Saanen, Alpine Chamoiste et Poitevine. Annls Genit. Sel. anim. 1: 391395.Google Scholar
Soller, M. and Angel, H. 1964. Polledness and abnormal sex ratios in Saanen goats. J. Hered. 55: 139142.Google Scholar
Soller, M. and Kempenich, O. 1964. Polledness and litter size in Saanen goats. J. Hered. 55: 301304.Google Scholar