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The Journal of Heredity 1988:79(4):313-314
© 1988 The American Genetic Association 79:313-314

research-article

Evidence for Multigene Control of Cryptorchidism in Swine

M. F. Rothschild, L. L. Christian, and W. Blanchard

Department of Animal Science, lowa State University Ames

Address reprint requests to Dr. Rothschild, Department of Animal Science, 225 Kildee Hall, Iowa State University, Ames, IA 50011.

Abstract

The mode of inheritance of cryptorchidism was investigated in Duroc swine Matings ofcryptorchid males with females whose full-sib brothers were cryptorchids were done. Sixteen of these litters were farrowed, and 54 males were born, of which 8 were cryptorchid. Two hypotheses were examined: first, that this trait is controlled by homozygosity of a recessive gene at a single locus; second, that it is controlled by homozygosity of recessive genes at two loci. The single-locus recessive hypothesis was rejected (P < .01), but the two-locus model was not. Culling to reduce the incidence of cryptorchidism is discussed.


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R P Amann and D N R Veeramachaneni
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Reproduction, March 1, 2007; 133(3): 541 - 561.
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