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    Controle genético da tolerância à salinidade em tomateiro
    (INSTITUTO FEDERAL DE ALAGOAS - Ifal, 2021-10-15) Nascimento , Denisson Lima do; Costa, Kleyton Danilo da Silva; https://orcid.org/0000-0003-4631-3240; http://lattes.cnpq.br/3562128215536520; Silva, Michelangelo de Oliveira; http://lattes.cnpq.br/5831953262176334; Silva, Michelangelo de Oliveira; Prates, Fabiano Barbosa de Souza; http://lattes.cnpq.br/6530012770891274; Costa , Kleyton Danilo da Silva; https://orcid.org/0000-0003-4631-3240; http://lattes.cnpq.br/3562128215536520
    Cultivation of tomato under salinity conditions can be an extremely important concern worldwide. As a culture sensitive to this stress, it can damage its development and productivity. As one of the viable practices to avoid symptoms, the use of tolerant cultivars in order to assist in agricultural management and increase their yield. In this sense, obtaining information about genetic control of tolerance is the best strategy for developing cultivars in breeding programs. Therefore, the objective of this work was to study the genetic control of salinity tolerance in tomato. Experiments were carried out with the F1, F2 generations, and with their respective parents (Yoshimatsu and IPA-7), using a randomized block design with five replications. For this, 950 plants of the F2 generation were evaluated, 100 F1 plants and 100 plants of each parent, that is, the cultivars IPA-7 and Yoshimatsu, totaling 1250 plants that were irrigated with high salinity water. A descriptive grading scale was used to discriminate the salinity tolerant and non-salinity tolerant plants at 20, 30, 40 days after transplanting. The use of frequency distribution contributed to the analysis of symptoms in plants. Due to the behavior of the genotypes, they revealed that they became promising and potentially useful in tomato genetic improvement programs. Genetic control of tomato salinity tolerance involves a larger gene with more polygene additive effects, in which tolerance is associated with recessive alleles. Obtaining salinity-tolerant tomato progenies is indicated at 30 and 40 days after transplanting