Basic selection trait in dairy sheep in Bulgaria for the last 30 years was the milk yield (LY) for the whole lactation period. ICAR recommendations (Barillet et al., 1992) suggested to implement recording after the weaning of lambs, e.g. the control during the milking only period (CY). Corresponding to these proposals a study was performed to compare the estimates of all factors, fixed and random, for each of the three yield traits, recorded during the suckling period, after the weaning of lambs, and for the entire period of lactation.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 1, , 1.54, 2002
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