Article
Genetic parameters of longevity traits of an upgrading population of dairy cattle.
Journal of dairy science - 1 Dec 1996
Vollema A R, Groen A F
Abstract excerpt
Longevity reflects the ability of a cow to avoid being culled for low production, low fertility, or illness. Longevity could be used in breeding programs if genetic parameters were known. Various measures are used for longevity. In this study, lifetime measures including number of lactations, total milk production, number of days in lactation, herd life, and length of productive life were analyzed. Also analyzed...
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