SELEÇÃO DE GENÓTIPOS F2RC1 DE TOMATEIRO INDUSTRIAL COM ELEVADOS TEORES DE ZINGIBERENO RESISTENTES A ARTRÓPODES-PRAGA

Abstract

This study aimed to select for processing tomato genotypes with high zingiberene levels and resistance to tomato leafminer, the whitefly and spider mite. Selection was made in the generation F2BC1 coming from the intersection Solanum habrochaites var. hirsutum x S. lycopersicum cv. "Redenção". This generation, were evaluated 600 individuals along with 40 plants of each parental (wild and commercial) totaling 680 plants. The zingiberene quantification was performed by the spectrophotometric method. We selected 6 plants with high content of zingiberene (RVTZ 2011-079-117, RVTZ 2011-079-185, RVTZ 2011-079-335, RVTZ 2011-079-345, RVTZ 2011-079-385, RVTZ 2011-079-503) and 4 with low (RVTZ 2011-079-417, RVTZ 2011-331-460, RVTZ 2011-331-524 e RVTZ 2011-331-548). The F2BC1 genotypes with high zingiberene content RVTZ 2011-079-345, RVTZ 201-079-503, RVTZ 2011-079-117, RVTZ 2011-079-185 e RVTZ 2011-079-335 obtained resistance levels to spider mite which did not differ from the parental for high content of zingiberene, being better than cultivar "Redenção". Genotypes rich in zingiberene also had lower leaf area destroyed by pinworm tomato, lower intensity values of plant damage, injuries in leaflets and percentage of leaflets attacked by moth, and reduced oviposition by the whitefly in latest reviews, compared to the selected lines with low zingiberene content. However, there was not significant correlation between zingiberene content and number of tomato leafminer eggs and caterpillars, and mumber of whitefly nymphs in genotypes. Selection of tomato genotypes to high-content based processing zingiberene shown to be effective in promoting resistance to pests studied.