Estimates of genetic parameters and efficiency in selection for branching capacity in soybean genotypes

Abstract

In soybean breeding programs, research which seek to increase the efficiency of selection of soybean lines more productive have proved promising. The objective of this research was to estimate the efficiency of selection of genotypes with greater branching capacity and more productive, as well as to estimate genetic parameters for these traits. To estimate the expected gain from selection, 11 progenies in F3 generation were used, conducted in a randomized block design with six replications. The progenies had their gains estimates which were compared with the real gain obtained on F4 generation, which were conducted on experimental field in a randomized block design, with three replications. It was concluded that there are genetic variability for the productivity among evaluated progenies and also to issuing capability of lateral branches in soybean, however, the selection seeking to intensify or reduce this characteristic does not imply achievement of production gains.