J. Anim Sci.
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J. Anim Sci. 1972. 34:193-195.
© 1972 American Society of Animal Science
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Phenotypic and Genetic Parameters for Growth in Guinea Pigs1

E. U. Dillard, R. Vaccaro2, J. Lozano3 and O. W. Robison4

North Carolina State University, Raleigh 27607

Abstract

Data from 1664 guinea pigs of two non-inbred lines or strains were used to estimate phenotypic and genetic parameters of growth. This study suggests the presence of considerable additive genetic variance for growth in one additional mammal. Pooled estimates of heritability for weaning weight, final weight, gain from birth to weaning and gain from birth to 91 days ranged from 0.46 to 0.52. The estimates of heritability for birth weight and gain from weaning to 91 days were 0.25. Thus it appears that selection for increased growth rate should be effective. The high genetic correlation between weaning weight and final or market weight of 0.89 suggests that selection for market weight might be based upon weaning weight with only a slight loss in efficiency.

Footnotes

1 Paper No. 3480 of the Journal Series of the North Carolina State University Agricultural Experiment Station. This research was done at the Estación Experimental Agrícola de La Molina, Lima, Perú and was supported by the Ministerio de Agricultura, Dirección General de Investigaciones Agropecuaris and the North Carolina Agricultural Mission to Perú.

2 Present address: Department of Animal Science, Cornell University, Ithaca.

3 Present address: Estación Experimentl Agrícola de La Molina, Lima, Perú.

4 The authors acknowledge the assistance of Ing. Marco Zaldivar, Dr. José Berruecos and Sr. Andres Anaya.






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Copyright © 1972 by the American Society of Animal Science.