Selection of tomato lines and populations for fruit shape and resistance to tomato leafminer

Nathalia Cv Resende,Andre Ricardo Zeist,André Gabriel,Alex Antonio Da Silva,Juliano Tadeu V De Resende,Wilson Roberto Maluf

doi:10.1590/s0102-053620200202

Abstract

ABSTRACT The market requirement regarding fruit type varies from region to region and it is necessary to produce cultivars with different patterns of fruit morphology. Therefore, the aim of this study was to select lines with resistance to tomato leafminer and different fruit shapes in order to meet the different market segments. Seventy-six lines and pre-selected populations were used for pest resistance together with four other susceptible controls (TOM-584, TOM-684, NC-123S, and Santa Clara) and two wild accessions (Solanum pennellii ‘LA 716’ and S. habrochaites var. glabratum ‘PI-127826’) considered resistant. The experiment consisted of tests of resistance to the tomato leafminer Tuta absoluta. The selection of lines was efficient, being obtained 33 lines or populations resistant to the tomato leafminer that comprise the market segments of the types of multilocular fruit, Santa Cruz, Saladette or Italian, as well as intermediate standards of fruits.

Highlights

Seleção de linhagens e populações de tomateiro para formato de fruto e resistência à traça do tomateiro
The cultivation of vegetables is related to the excessive use of agricultural pesticides, which residues persist in fruits and, increase the consumer concern
Sources of resistance to pests have been found in some species of wild tomatoes, such as Solanum pennellii and Solanum habrochaites

Summary

Introduction

Seleção de linhagens e populações de tomateiro para formato de fruto e resistência à traça do tomateiro. A seleção das linhagens foi eficiente, sendo obtidas 33 linhagens ou populações resistentes à traça-dotomateiro que compreendem os segmentos de mercado dos tipos de fruto multilocular, Santa Cruz, saladete ou italiano, bem como frutos com padrões intermediários. The resistance factors of these species are directly related to the contents of allelochemicals present in the leaves, such as the acylsugars in S. pennellii and zingiberene in S. habrochaites. The effects of these allelochemicals are related to deleterious effects on the development of some insect phases, as Horticultura Brasileira 38 (2) April - June, 2020 well as to decrease its oviposition and feeding (Resende et al, 2002a; Lucini et al, 2015; Maciel et al, 2018)

Objectives

Methods

Results