Article
Genetic markers for lactation persistency in primiparous Australian dairy cows.
Journal of dairy science - 1 May 2010
Pryce J E, Haile-Mariam M, Verbyla K, Bowman P J, Goddard M E, Hayes B J
Abstract excerpt
Good performance in extended lactations of dairy cattle may have a beneficial effect on food costs, health, and fertility. Because data for extended lactation performance is scarce, lactation persistency has been suggested as a suitable selection criterion. Persistency phenotypes were calculated in several ways: P1 was yield relative to an approximate peak, P2 was the slope after peak production, and P3 was a...
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