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The present analysis compares the estimated breeding values (EBVs), relativebreeding values (RBVs), and daughter yield deviations (YDs) of cows withexceptional longevity with their contemporary herdmates. In addition, therelative breeding values of their sires were compared among these twodaughter groups; the RBVs of the sires were also compared with the proportion oftheir daughters with exceptional longevity. Data included 5037 sires bornbetween 1963 and 1996 with a total of 61 988 daughter; of these sires, 486 hadsired daughters that completed more than nine lactations (exceptionalcows) and 4957 sires had sired the contemporary herdmates. Exceptional cowshad on average significantly lower EBVs for milk yield, fat and proteinyield, and significantly lower YDs for milk and protein yield in the first threelactations, significantly lower RBVs for milk production and type butsignificantly higher RBVs for somatic cell score and functional longevity.The sires of exceptional cows had significantly higher RBVs for somatic cellcount (RZS), functional longevity (RZN), and fitness (RZFit) in comparison tothe sires of contemporary herdmates. Correlations among the proportion ofexceptional cows per sire and RZN, RZS as well as RZFit were positive,whereas milk production (RZM) showed a negative correlation. An increase in the number of cows with exceptional longevity may be possible through a relative total breeding value with high positive weights for RZN, RZS, and RZFit but negative weights for RZM and type (RZE)

Comparison of breeding values among cows with exceptional longevity and their contemporary herdmates in German Holsteins