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Title:
A note on genetic parameters for estrus symptoms in sows
Author(s): Sibylle Gäde, Jörn Bennewitz, Katrin Kirchner, Holger Looft, Pieter W. Knap, Georg Thaller, Ernst Kalm
Publication Date: January 1, 2008
Reference: Applied Animal Behaviour Science 109 (2008) 406–409
Country: Germany

Summary:

The aim of the study was to estimate genetic parameters and breeding values for estrus symptoms, a trait which included
swelling and reddening of the vulva, interest in the boar and strength of the standing reflex. This paper concludes that it seems that a selection for the trait estrus symptoms is possible but is not accompanied by a change in the litter size.

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