Amalia Andreza Sousa Silva
AUTHOR: Amalia Andreza Sousa Silva
TITLE: QUALITY OF SAVED SOYBEAN SEEDS IN JATAÍ - GO
ADVISOR: Prof. Dr. Carla Gomes Machado, Co-advisor: Prof. Dr. Givanildo Zildo da Silva, Co-advisor: Prof. Dr. Luciana Celeste Carneiro
APPROVAL DATE: 07/30/2020
Abstract
Brazilian law allows the producer to reserve part of his production as seeds for his own use, known as saved seeds. The quality of these is not known due to scarce or absent production quality control. The objective was to evaluate the quality of saved soybean seeds in contrast to commercial seeds in Jataí - GO. Three independent experiments were carried out with the cultivars: BONUS 8579RSF IPRO, FLX 6266RSF IPRO and FOCO 74I77RSF IPRO, using 9, 8 and 6 lots of saved seeds, respectively, and 1 more lot of commercial seeds for each cultivar. The lots were evaluated in the laboratory and in the field. In the laboratory, a completely randomized design was adopted, with seed quality being measured by tests: water content, mass of a thousand seeds, germination, first count of germination, and sanity. Field experiments were carried out in randomized blocks, and atypical plants, final population and productivity were evaluated. After harvesting, the seeds were subjected to the aforementioned laboratory tests and the data were subjected to analysis of variance by the F test and, when significant, the means were compared using the Dunnett test, at the level of 0.1, 1 and 5% of probability. The lots of saved seeds of the cultivar FOCO in the 2018-2019 harvest achieved high performance in relation to physiological quality. In this work, a high incidence of Cercospora kikuchii was observed in the seed lots of the 2018-2019 crop in all cultivars. It is concluded that, in relation to quality, there is no pattern of behavior of saved seed lots from cultivars BONUS, FLX and FOCO produced in the city of JataíGO, in relation to commercial lots.
