Poster (Scientific congresses and symposiums)
Female fertility expression in Walloon dairy cattle
Vanderick, Sylvie; Bastin, Catherine; Gengler, Nicolas
20109th World Congress on Genetics Applied to Livestock Production
 

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Keywords :
Female fertility; index
Abstract :
[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.
Disciplines :
Genetics & genetic processes
Animal production & animal husbandry
Author, co-author :
Vanderick, Sylvie  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Bastin, Catherine ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Gengler, Nicolas  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Language :
English
Title :
Female fertility expression in Walloon dairy cattle
Publication date :
August 2010
Event name :
9th World Congress on Genetics Applied to Livestock Production
Event organizer :
International Committee for World Congresses on Genetics Applied to Livestock Production
Event place :
Leipzig, Germany
Event date :
August 1-6, 2010
Audience :
International
Additional URL :
Available on ORBi :
since 13 October 2010

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