Productivity, acylsugar concentrations and resistance to the two-spotted spider mite in genotypes of salad tomatoes/Produtividade, teor de acilacucares e resistencia ao acaro rajado de genotipos de tomateiro tipo salada

The objective of this study was to characterize genotypes of the salad-type tomato with a determinate growth habit and select genotypes resistant to the two-spotted spider mite for higher productivity and fruit quality. The experiment was conducted at the Horticultural Experimental Station (18[degrees]42'43,19" S and 47[degrees]29'55,8" W, 873 m altitude) of the Universidade Federal de Uberlandia (UFU), Monte Carmelo campus, from January to June 2018. The experimental design was in randomized blocks containing 16 treatments [12 populations of the [F.sub.3][RC.sub.2] generation and four controls: two commercial cultivars (Santa Clara and Rio Grande), the recurrent parent (UFU-057) and the wild species Solanum pennellii (LA-716)] with three repetitions. The accessions UFU-057[F.sub.3][RC.sub.2]10#3.6.1 and UFU-057[F.sub.3][RC.sub.2]13#2.1.2 have high potential for genetic improvement regarding resistance to the two-spotted spider mite. The genotypes UFU-13#4.4.1, UFU-7#4.7.1, UFU-7#4.3.2, UFU-13#2.5.2 and UFU-13#2.1.3 present higher acylsugar concentrations than S. pennellii, in addition to higher productivity and number of fruits per plant. It is suggested to explore combinations between those genotypes previously described with UFU-8#2.4.1 to obtain hybrids with high acylsugar concentrations, two-spotted spider mite resistance, high productivity and increased fruit mass. Key words: Solanum lycopersicum L., Tetranychus urticae, biotic stress, allelochemicals Objetivou-se com este estudo caracterizar genotipos de tomateiro do tipo salada com habito de crescimento determinado, selecionar genotipos resistentes ao acaro rajado, de maior produtividade e qualidade de frutos. O experimento foi conduzido na Estacao Experimental de Hortalicas (18[degrees] 42' 43,19" S e 47[degrees] 29' 55,8" O, 873 m de altitude) da Universidade Federal de Uberlandia (UFU), campus Monte Carmelo, de janeiro a junho de 2018. O delineamento experimental foi em blocos casualizados, contendo 16 tratamentos [12 populacoes da geracao [F.sub.3][RC.sub.2] e quatro testemunhas: duas cultivares comerciais ( Santa Clara e Rio Grande), o genitor recorrente (UFU-057) e a especie silvestre Solanum pennellii (LA-716)] com tres repeticoes. Os acessos UFU-057[F.sub.3][RC.sub.2]10#3.6.1 e UFU-057[F.sub.3][RC.sub.2]13#2.1.2 possuem alto potencial para o melhoramento genetico visando resistencia ao acaro rajado. Os genotipos UFU-13#4.4.1; UFU-7#4.7.1; UFU-7#4.3.2, UFU-13#2.5.2 e UFU-13#2.1.3 apresentara