Grilli, G. V G [UNESP]Braz, L. T. [UNESP]Perecin, D. [UNESP]Oliveira, J. A. [UNESP]2014-05-272014-05-272003-12-01Acta Horticulturae, v. 607, p. 179-184.0567-7572http://hdl.handle.net/11449/67540The aim of present work was to study, through means and variances of generations, the genetic control of fruit-set percentage in tomatoes, in a biparental cross between line Jab-95 (resistant to fruit-set) and 'Caribe' cultivar (susceptible to fruit-set) after being subjected to high temperatures. F1, F2, and backcross generations for both parents (P 1, P2) were produced in a greenhouse at FCAVUNESP, Jaboticabal-SP, Brazil. A randomized complete block experimental design with four replications was used to evaluate the different generations. Estimates of genetic parameters were obtained according to Mather and Jinks (1982). An additive-dominant model was fitted to explain the variation observed. The mean degree of dominance (0.54), indicated incomplete dominance in the direction of increasing fruit-set percentage at high temperatures. The genetic control of fruit-set percentage, at high temperatures, for tomato was found to be oligogenic or polygenic (3.54 genes). The heritability in a limited sense was 83.91%, suggesting that the selection of individuals based on the characteristic evaluated can be efficient.179-184engHeritabilityLycopersicon esculentumMean degree of dominanceNumber of genesPlant breedingTrabalho apresentado em eventoWOS:000184645500027Acesso aberto2-s2.0-848796522947087372884726559