J. Anim Sci.
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J. Anim Sci. 1965. 24:819-822.
© 1965 American Society of Animal Science
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Age-Constant Feed Efficiency of Pigs1, 2,

Y. I. Park3

Iowa State University, Ames

Abstract

Heritabilities and relationships among feed efficiency, gain, and feed consumption of Duroc and Hampshire pigs raised over an age-constant interval from 42 days to 154 days of age were examined to learn about the age-constant feed efficiency and the utility of selecting pigs for it. The results suggest that the feed efficiency measured over an interval of constant weights is a better criterion for selection than the age-constant feed efficiency.

Footnotes

1 Journal Paper No. J-5010 of the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa. Project No. 1424. This work has received assistance from Contract AT(11-1)-707, U. S. Atomic Energy Commission.

2 The author gratefully acknowledges the helpful counsel and suggestions of J. L. Lush, L. N. Hazel and D. F. Cox.

3 Present address: Department of Genetics, The University of Wisconsin, Madison, Wisconsin.






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Copyright © 1965 by the American Society of Animal Science.