Genetic Parameters for Productive Longevity in Limousine Breed

The productive longevity is an important economic trait in beef production. The functional longevity was represented by the period between first parity and the time when the cow was reformed. The functional longevity in beef sector depends by the reproduction records of cows. The aim of the present study was to estimate the genetic parameters for productive longevity in Limousine breed using the survival model, Weibull proportional hazard model. Productive longevity data were analysed with survival model, Weibull proportional hazard. The pedigree consisted in 1197 cattle: 484 dams, 206 sires and 507 cows with records. The fixed effect was represented by production with three levels: high, medium, low. The productive longevity in Limousine breed was months. The breeding values of cattle for productive longevity were from -0.155 and 0.070 months in Limousine breed. The value of heritability in the Limousine breed was 0.097±0.169. The productive longevity of cows from Limousine breed can be improved by selection of the cattle with highest breeding values.