Reference : Female fertility expression in Walloon dairy cattle
Scientific congresses and symposiums : Poster
Life sciences : Animal production & animal husbandry
Life sciences : Genetics & genetic processes
http://hdl.handle.net/2268/73918
Female fertility expression in Walloon dairy cattle
English
Vanderick, Sylvie mailto [Université de Liège - ULg > Sciences agronomiques > Zootechnie >]
Bastin, Catherine mailto [Université de Liège - ULg > Sciences agronomiques > Zootechnie >]
Gengler, Nicolas mailto [Université de Liège - ULg > Sciences agronomiques > Zootechnie >]
Aug-2010
No
No
International
9th World Congress on Genetics Applied to Livestock Production
August 1-6, 2010
International Committee for World Congresses on Genetics Applied to Livestock Production
Leipzig
Germany
[en] Female fertility ; index
[en] A useful method to express female fertility of the Walloon dairy cattle using direct and indirect female fertility information was considered. Data were based on results of the genetic evaluation of pregnancy rate for 606,328 Holstein cows and on INTERBULL proofs of female fertility for 88,496 bulls. A direct female fertility index (DFF), using INTERBULL proofs, was developed from results of a principal component analysis carried out on 6 published foreign female fertility indexes. An indirect female fertility index (IFF) was also developed from ten other traits evaluated in Walloon Region. Theory of selection index was used to combine DFF and IFF in a global index called combined female fertility index (CFF). This index allowed young bulls to have better reliabilities with an average increase of 12% leading to extra 4,019 of publishable bulls for female fertility.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/73918
http://www.wcgalp2010.org

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