Breed Differences in Return to Estrus after PGF2 α-Induced Abortions in Swine
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The Department of Animal Science originally concerned itself with teaching the selection, breeding, feeding and care of livestock. Today it continues this study of the symbiotic relationship between animals and humans, with practical focuses on agribusiness, science, and animal management.
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The Department of Animal Husbandry was established in 1898. The name of the department was changed to the Department of Animal Science in 1962. The Department of Poultry Science was merged into the department in 1971.
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- Department of Animal Husbandry (1898–1962)
- College of Agricultural and Life Sciences (parent college)
- Department of Poultry Science (merged with, 1971)
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Abstract
Fifty-seven Duroc, 41 Landrace and 38 Yorkshire purebred sows in d 10 to 53 of pregnancy were aborted to synchronize estrus by using prostaglandin F2α (PGF2α). Breed differences in time between injection of two 10-mg doses of PGF2α and return to estrus were observed in these three breeds of pregnant sows during two breeding seasons. Duroc sows returned to estrus .9 d faster (P<.01) than Yorkshire and 1.3 d faster (P<.01) than Landrace sows. Seasonal differences were also observed. The mean days from injection to estrus were 1.8 d fewer (P<.01) for the spring season than in the fall season. All sows expressed estrus 5 to 11 d after injection. Normal gestation, parturition and piglet survival were observed in the sows after the treatment. Genetic differences in response to induced abortion and return to estrus could have implications in planned breeding and farrowing systems.
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This is an article from Journal of Animal Science 61 (1985): 354, doi:10.2134/jas1985.612354x. Posted with permission.