The effect of gilt age at first estrus and breeding on third estrus on sow body weight changes and long-term reproductive performance1

The objective of this trial was to determine the effect of age at first estrus on BW changes and long-term reproductive performance of sows. At approximately 100 d of age, prepubertal C22 gilts (n = 431) were allocated to trial. At a pen average of 140 d of age, guts began daily direct contact with...

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Bibliographic Details
Published in:Journal of animal science 2010-07, Vol.88 (7), p.2500-2513
Main Authors: Patterson, J. L., Beltranena, E., Foxcroft, G. R.
Format: Article
Language:English
Subjects:
Animal reproduction
Breeding of animals
Fertility
Hogs
Puberty
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Summary:The objective of this trial was to determine the effect of age at first estrus on BW changes and long-term reproductive performance of sows. At approximately 100 d of age, prepubertal C22 gilts (n = 431) were allocated to trial. At a pen average of 140 d of age, guts began daily direct contact with mature boars to stimulate onset of puberty. Gilts (n = 317, 73%) were recorded as cyclic by 180 d of age (select) and were classified on the basis of age at puberty into 3 puberty groups: 1) early puberty (EP;
ISSN:0021-8812
1525-3163
DOI:10.2527/jas.2008-1756