Agronomic performance of transgenic soybean cultivars in Brazilian Cerrado

Abstract

The productive capacity of soybeans is associated with the adaptation of the culture to the cultivation environment. Factors such as a high number of pods, the weight of a thousand grains, and grain number are essential factors in determining cultivars of high productive potential. The launching of new varieties associated with new technologies makes it necessary to know the performance of these varieties in different growing environments. This study aimed to analyze the agronomic performance of transgenic soybean cultivars under Cerrado conditions. The experimental design used completely randomized blocks; six of the twelve cultivars used RR1 technology and the remaining six used RR2BT. The cultivars were grown in five distinct locations in the southwest region of Goiás. The results demonstrated no increments in the grain yield of the RR1 or RR2BT technologies and the precocity of the cultivars also did not favor an increase in grain yield. The localities of Jataí and Rio Verde did not influence the cultivar cycle.

Weed Competition on Soybean Varieties from Different Relative Maturity Groups

“…Regardless of the weed management used, no differences were observed in grain yield between soybean varieties with all materials showing an average yield close to 4000 kg ha −1 (Table 5). The absence of effects for the variety factor may be because even if the material has a superior genetic yield potential since agronomic performance is influenced by the environment in which the variety is inserted [36], the edaphoclimatic component may have a decisive influence on the response of the variation in yield potential. Therefore, when the environment does not present favorable characteristics for gene expression, grain yield ends up being limited.…”