Estimates of genetic parameters for weaning weight adjusted to 240 days of age (WW240), age at first calving (AFC), age at second calving (ASC) and first calving interval (FCI) in Nellore cattle using REML methodology (MTDFREML), were obtained. Heritability estimates from univariate analyses were: 0.48±0.20; 0.27±0.15; 0.14±0.16; and 0.03±0.13, for WW240, AFC, ASC and FCI, respectively. Genetic correlation estimates between AFC and ASC and AFC and FCI were 0.97, -0.92, respectively. The genetic correlation between ASC and FCI was -0.82. The genetic correlations between WW240 and AFC, ASC and FCI were -0.20, 0.00 and 1.00, respectively.
cattle; genetic correlation; heritability
