Methods of selection of soybean genotypes for tolerance to rain on pre-harvest

Soybean production chain is facing serious challenges for high quality seed and grain production. This paper proposes a simple method to select genotypes with tolerance excess moisture. The study was divided into three stages. Stage I consisted in plant standardization of maturity 25 seeding Passo Fundo-RS during 2013-2014 growing season 500 plants were harvested from each genotype at R7-R8 stage. II composed by rainfall temperature simulation assays which carried out greenhouse facility Cambé-PR. III physiological determination. Samples evaluated 1000-seeds weight, germination, first count accelerated aging shoot root dry matter. Simulation rain days preharvest period resulted reduced viability vigor DMARIO59i, A4725RG, NS4823 FPS URANO RR indicating consideration the harvesting time close R8 stage these genotypes.