Abstract
The zingiberene is a sesquiterpene that is present in tomato leaves. This compound is known to promote resistance to pests and diseases. The Brazil has a germplasm bank of vegetable at Universidade Federal de Viçosa (HGB-UFV) crops with over 8 million accesses. One technique that helps in the choice of progenitors with favorable concentrations of zingiberene is the diallel crosses. The diallel crosses allow the estimation of general combining ability (GCA) and specific combining ability (SCA). Thus, the aim of this study was to find out tomato hybrids with high zingiberene concentrations. The genitors were divided into two contrasting groups for resistance to pests. The characterization and quantification spectrophotometric of zingiberene was performed, obtaining absorbance values at 270 nm. To determine the content of zingiberene in hybrids those were coming from the diallel cross. The analysis from the spectrophotometric method was performed. The estimates of GCA and SCA of these hybrids at combinations HGB 2119 x LA716, HGB 2119 x PI 12786, HGB 2214 x HGB 674, HGB 2064 x HGB 674, HGB 2214 x PI 127826, HGB 985 x LA 716 and Santa Clara x HGB 674 have high potential in tomato plant breeding aiming of resistance to pests and diseases.
Highlights
The tomato plants (Solanum lycopersicum Mill.) is one of the vegetables grown worldwide (Filgueira, 2008)
The estimates of general combining ability (GCA) and specific combining ability (SCA) of these hybrids at combinations HGB 2119 x LA716, HGB 2119 x PI 12786, HGB 2214 x HGB 674, HGB 2064 x HGB 674, HGB 2214 x PI 127826, HGB 985 x LA 716 and Santa Clara x HGB 674 have high potential in tomato plant breeding aiming of resistance to pests and diseases
Among the main factors affecting the production of tomato, are pests and diseases, so the search for resistant cultivars is necessary.The attainment of cultivars resistant to pests and diseases is of fundamental importance to study the causes of resistance
Summary
The tomato plants (Solanum lycopersicum Mill.) is one of the vegetables grown worldwide (Filgueira, 2008). The study of the variation of zingiberene concentrations in tomato hybrids can be estimated using breeding tools known as diallel crosses, among them partial diallel which is a statistical genetic design where many genitors are crossed pairs, and allow to estimate the general combining ability (GCA) and specific combining ability (SCA). Using these estimates are selected the best genitors and the best hybrids for use in breeding programs
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