The relationship of conformation traits, particularly locomotive traits, and herd life under different management systems was investigated. Herd life to 84 mo was regressed on measures of linear type and production for 139,998 cows in 6277 herds. Linear traits accounted for 14% of explained variation for herd life after effects for herds and production were considered. Udder traits explained more herd-life variation than other conformation traits. Fore udder attachment and udder depth explained the most variation when production was included in analyses. Udder depth explained the least amount of herd-life variation among six udder traits when production was not included in the analyses.
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Burke et al. (1993) studied this question.
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