J. Anim Sci.
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J. Anim Sci. 1978. 46:69-82.
© 1978 American Society of Animal Science
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Comparison of Productivity and Performance for Two-Breed and Three-Breed Crosses in Swine1

R. K. Jonhson2, I. T. Omtvedt3 and L. E. Walters2

Oklahoma State University, Stillwater 74074

Abstract

The breeding performance and subsequent productivity and progeny performance of 835 purebred and two-breed cross Duroc, Hampshire and Yorkshire females were analyzed to compare the productivity of purebred and crossbred females and the performance of two-breed and three-breed cross pigs. A total of 406 purebred and 429 crossbred females were saved for breeding with 148 purebred and 194 crossbred gilts slaughtered 30 days postbreeding. Litter productivity was measured on 193 two-breed and 199 three-breed cross litters. Growth and feed efficiency data included 1,246 two-breed and 1,599 three-breed cross barrows and gilts and carcass merit was evaluated on 252 two-breed and 261 three-breed cross barrows.

Conception rate and ovulation rate of purebred and crossbred females were very similar. However, crossbred gilts slaughtered 30 days postbreeding had .71 ± .38 more embryos per gilt. These gilts were also 5.8 ± 1.4 days younger at 100 kg and 11.7 ± 2.1 days younger at breeding than purebred gilts. Crossbred females farrowed .93 ± .32 and weaned 1.24 ± .27 more pigs per litter than purebred females. Survival rate of three-breed cross pigs was significantly higher than two-breed crosses, both early in gestation and from birth to weaning. Total litter weight weaned was 19.6% heavier for crossbred females with three-breed cross litters than for purebred females with two-breed cross litters. There was very little difference between two-breed and three-breed cross pigs for growth rate, feed efficiency, probe backfat or carcass merit.

Footnotes

1 Journal Article 3254 of the Agricultural Experiment Station, Oklahoma State University, Stillwater. Research conducted by the Department of Animal Science (Project 1444) in cooperation with the USDA, Agricultural Research Service, Southern Region.

2 Department of Animal Science, Oklahoma State University, Stillwater 74074.

3 Department of Animal Science, University of Nebraska, Lincoln 68503.






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Copyright © 1978 by the American Society of Animal Science.