The ultimate aim of most dairy producers is to maximise profitability. While yields of protein, fat and milk are traits of great importance in this respect, breeding goals should be broadened to include traits other than production, such as health and reproductive traits. In Scandinavia, some fertility traits are already included as breeding objectives in breeding programmes, to counter the deterioration in fertility due to selection for increased milk yield (Solbu and Lie, 1990). In order to estimate breeding values of animals, variance components and genetic parameters are required to estimate breeding values that are needed to select animals. The aim of this study was to estimate variance components and genetic parameters of 305-day milk yield and calving interval.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 2002. Session 1, , 1.64, 2002
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