J. Anim Sci.
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J. Anim Sci. 1980. 51:871-874.
© 1980 American Society of Animal Science
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Fraternity Size and Swine Reproduction. II. Genetical Consequences1

J. J. Rutledge2

University of Wisconsin, Madison 53706

Abstract

A model for swine fecundity that includes the effect of fraternity size is given. Over a range of plausible values for the parameters of the model, the dam-daughter correlation for number born tended to be negative. Thus, selection of replacement gilts born and reared in large litters would not bring about desirable genetic changes in litter size.

Footnotes

1 Paper no. 743 from the Dept. of Meat and Anim. Sci. Research supported by the College of Agricultural and Life Sciences, Univ. of Wisconsin. Contribution to the Regional Swine Breeding Project NC-103.

2 Appreciation is expressed to the referees for useful suggestions. Professors A. B. Chapman and Sewall Wright are thanked for their critical comments.






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Copyright © 1980 by the American Society of Animal Science.