Genetic divergence of Nellore bulls with available semen in headquarters of insemination in Brazil

Abstract

The objective of this study was to evaluate the genetic divergence, among 33 Nellores bulls with available semen in Headquarters of Insemination, based in the expected differences in their progenies regarding development and reproductive characteristics, through techniques of multivariate analysis. Dissimilar measures were obtained through the Euclidian distances standardized averages, being the largest dissimilar among the bulls with distance of 2.5840 and the largest similarity among the progenitors with dear value of 0.3423 of distance. Ten groups of reproductive as same similarity pattern were obtained by grouping technique, with four divergent bulls in relation to the others. Scores of the main components were dear, to obtain dispersion graphs, that made possible the visual evaluation of the genetic divergence and of the dissimilar pattern among the studied materials. Of the principal components that explained most of the total variance, the first explained 30.33%, the second answered for 24.09% and the third for 16.75% of the variance. The estimates of found genetic divergence allow to define progenitors that can produce won significant in function of the heterotics effects originating from of matings among their progenies.