Caracter???-sticas zoot????cnicas de touros da ra???§a Nelore submetidos a um programa de sele???§???￡o para precocidade sexual

摘要

Twenty-four Nelore bulls (Bos taurus indicus) were divided in three groups of eight animals each according to EP: Group 1 EP above average (EP>22.8cm); Group 2 EP 5% below average (EP between 21.6 and 22.6cm); and Group 3 EP from 10 to 5% below average (EP between 20.1 and 21.2cm). For the AOL and EG analysis the 24 animals were divided in two groups: G1 (more precocious) and G2 (less precocious), classified according to the age in which each animal reached puberty. G1 presented greater EP at puberty and less weight in comparison to G2 and G3. The AOL measures did not present difference between G1 and G2 groups. The animals in G1 reached puberty at a younger age, while the fat deposition occurred in G2. The use of productive characteristics in a program to select animals for sexual precocity can constitute a great advance for cattle productivity, increasing the genetic gain and decreasing production costs.