Article
The genetic structure of longevity in dairy cows.
Journal of dairy science - 1 Feb 2016
Heise Johannes, Liu Zengting, Stock Kathrin F, Rensing Stefan, Reinhardt Friedrich, Simianer Henner
Abstract excerpt
Longevity of dairy cows is determined by culling. Previous studies have shown that culling of dairy cows is not an unambiguous trait but rather the result of several reasons including diseases and selection decisions. The relative importance of these reasons is not stable over time, implying that genetic background of culling may vary over lifetime. Data of 7.6 million German Holstein cows were used to assess the...
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