Incidência de galhas de Meloidogyne incognita raça 1 em progênies de F2:3 (‘Salinas 88’ x ‘Colorado’) de alface

Abstract

The aim of this work was to estimate genotypic, phenotypic and environment parameters for incidence of galls in lettuce F2:3 progenies, may lead to contribute breeding programs for incorporation of the resistance to root-knot nematodes. The experiment was carried out in greenhouse, using expanded polystyrene trays with 128 cells, in completely randomized blocks design with two replicates and eight plants each plot. The substrate was infested with substrate 30 eggs.cm–3 of Meloidogyne incognita race 1.The evaluation was made 45 days for the incidence of galls. The estimated high broad heritability varied from 38% to 74%. Therefore, lettuce cultivar Colorado is less resistant degree than lettuce cultivar Salinas 88 to root-knot nematodes and the incidence of galls can be used in the selection between and inside of lettuce progenies, mainly in an early of breeding program.