Abstract

In France, since dairy sheep has been efficiently selected on milk traits, more attention is now given to face new goals relevant to reduce the production costs and increase the quality and safety of products. In that way, on-going research is focusing on genetic determinism of milkability which is an important functional trait with regard to udder health as well as to milking labour efficiency. Research regarding selection for mastitis resistance or udder morphology is on-going both on-farm and experimental flock (Barillet et al., 2001 ; MarieEtancelin et al., 2001 ; Rupp et al., 2002). Conversely in France, research on genetic determinism of milkability in sheep is in progress only in an INRA experimental flock (La Fage), since corresponding phenotypes have been recorded for several years only in this farm. Indeed unlike bovine, the individual milking time is not a relevant trait of the milkability of sheep, since it describes only the milking routine (Flamant, 1974). Therefore, in order to measure traits related to milkability, INRA conceived an electronic jars device for sheep and goats, enable to record milk flow kinetics (Ricard et al., 1995).  The purpose of this paper is to present a first genetic analysis of milk flow kinetics of Lacaune ewes collected during 5 years in this experimental flock. 

C. Marie-Etancelin, J. Arhainx, M. R Aurel, P. Autran, B O Bibé, M. Jacquin, G. Lagriffoul, F. Pailler, D. Porte, E. Ricard, Francis Barillet

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 1, , 1.51, 2002
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