The conventional soybean production has been re-establishing itself every year, due to the fact that the international market has demanded products with high agronomic performance and nutritional quality, free of genetically modified organisms. This study aimed to evaluate the adaptability of conventional soybean genotypes in the southwestern Goiás state (Rio Verde, Montividiu and Santa Helena de Goiás), Brazil, during the 2017/2018 and 2018/2019 crop seasons. A randomized blocks design was used, being tested eight genotypes (the cultivars BRS284, BRS283, BRS232, BRS317, NT11-1277, INT3459 and M6101 and the line NT1478SP). The grain and oil yields, as well as the oil and protein contents, were evaluated. Multi-environment analyses were performed using a heterogeneous residual variance model, and the GGE biplot analysis was used to describe the interrelationships between genotypes and environments. The most adapted and stable genotypes were BRS 317 for grain yield and BRS 283 for oil yield. They also corresponded more closely to the ideotype for the specific region, thus proving to be promising. NT1478SP showed the highest protein content. In the 2018/2019 crop season, Montividiu was more discriminating for the conventional soybean production, regarding grain and oil yields.

There is a lack of genotypes recommended for baby corn production. Genotype x environment plays a major role for corn production. Traits related with baby corn are influenced by genetic-environmental factors.

The classical genetic improvement aims to select, mainly, cultivars with greater yield potentials; however, by associating the selection for disease resistance, it is possible to handle the management with cost reduction. The objective of this study was to evaluate the reaction of soybean genotypes to foliar diseases, and the agronomic characteristics of the soybean crop, with and without fungicide application. Two experiments were conducted concomitantly, in the same design and with the same managements, distinguishing with respect to the presence and absence of chemical treatment to control diseases. The experiments were conducted in Rio Verde, Goiás, in the 2015/2016 harvest, in a randomized complete block design with 31 soybean genotypes and three replicates. The plot consisted of 2 rows of 5 m in length, spaced 0.5 m apart. The following were evaluated: downy mildew severity, Asian rust, target spot, and end-of-cycle diseases (EOCD's), besides agronomic characteristics such as defoliation, thousand grain weight, and grain yield. For target spot and EOCD's, genotypes with lower susceptibility to diseases were observed. Regarding downy mildew and Asian rust, the genotypes have been shown to be susceptible, and chemical control was the most effective in the management of these pathogens. There was a significant interaction for thousand grain weight and grain yield, which implies that there is a distinct behavior of the genotypes regarding the presence and absence of diseases. The presence of diseases affected all the characteristics significantly, however, some genotypes stood out in both experiments, not presenting a significant reduction in grain yield when predisposed to the incidence of foliar diseases, consolidating effective control through genetic resistance.Additional keywords: chemical control; genetic breeding; genetic resistance; Glycine max. ResumoO melhoramento genético clássico visa a selecionar, principalmente, cultivares com maiores potenciais produtivos; entretanto, associando a seleção para resistência a doenças, pode-se viabilizar o manejo com redução de custo. O objetivo deste estudo foi avaliar a reação de genótipos de soja a doenças foliares e as características agronômicas da cultura da soja, com e sem aplicação de fungicidas. Foram conduzidos dois experimentos concomitantemente, no mesmo delineamento e com os mesmos tratamentos, distinguindo com relação à presença e à ausência de manejo químico para controle de doenças. Os experimentos foram conduzidos em Rio Verde, Goiás, na safra de 2015/2016, no delineamento experimental de blocos ao acaso, com 31 genótipos de soja e três repetições. A parcela foi constituída de 2 linhas de 5 m de comprimento, espaçadas entre si por 0,5 m. Avaliaram--se a severidade de míldio, a ferrugem-asiática, a mancha-alvo e as doenças de final de ciclo (DFC's), além das características agronômicas, como desfolha, peso de mil grãos e produtividade de grãos. Para mancha-alvo e DFCs, observaram-se genótipos com menor suscetibilidade às doenças. Em relação ...