The objective of this work was to estimate heritabilities (h2) and genetic correlations (rg) of semen motility (MOT), semen volume (VOL) and spermatozoa concentration (CON) of White Leghorn strain. Six hundred and ninety-eight DD1 strain roosters, developed at CNPSA/EMBRAPA, were used with the ejaculated collected at 24, 26 and 28 wk of age. The heritabilities estimates and standard deviation, respectively for the 24, 26 and 28 weeks of age, were for VOL, .30 (.18), .27(.17) and .32(.18), for MOT, .08(.16), […]