Agronomic performance and path analysis of roundup ready and conventional soybean from two-way crosses in the northwestern of So Paulo, Brazil

Abstract

The aim of this study was to compare the agronomic performance of RR soybean genotypes with conventional soybean genotypes derived from two-way crosses and evaluate through path analysis the influence of important traits for culture on the grain yield (GY) in the Northwestern of São Paulo, Brazil. It was used the randomized block design with three replications. Among the analyzed RR genotypes, three genotypes has high GY, with average values over 4575.5 kg ha-1 , while among the conventional, ten genotypes, and the check Conquista showed superiority for GY, with average values over 3511.4 Kg ha-1. In general, the most productive RR soybean genotypes showed higher values when compared with conventional genotypes with higher yield. However, conventional soybean showed a higher number of superior genotypes with similar behavior when compared to the RR soybean. For the group of RR soybean genotypes, all agronomic traits, except one hundred seed weight (HSW), correlated positively with GY. For the group of conventional soybean genotypes, there was no significant correlation between GY and all agronomic traits analyzed. The genotypic correlation and path analysis indicate the plant height at flowering (PHF) and plant height at maturity (PHM) as the most favorable and direct effect on GY.

Parâmetros genéticos e avaliação agronômica em progênies F2 de soja no Distrito Federal, Brasil

“…E magnitude mediana para a correlação entre APM x AIV. Leite et al (2016b) também obtiveram correlações positivas e significativas para NDM x APM e APM x AIV, avaliando 23 genótipos de soja na geração F 6 . Correlação positiva e significativa também foram obtidas na cultura da soja por Dallastra et al (2014).…”