Source: http://feedproxy.google.com/~r/mnt/healthnews/~3/ca-fvXdTjSM/270811.php
Wednesday, 8 January 2014
Mutation discovered with a built-in dilemma for dairy cattle breeders
Scientists have found a genomic deletion that affects fertility and milk yield in dairy cattle at the same time. The discovery can help explain a dilemma in dairy cattle breeding: the negative correlation between fertility and milk production.For the past many years milk yield in Scandinavian dairy cattle has gone in one clear direction: up. This has been due to targeted breeding programmes and modern breeding methods. Despite putting large weight in the breeding goal in Nordic countries, almost no improvement is achieved for fertility.
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