<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p><italic>Mi-1.2</italic> gene, expressed in tomato plants, contributes to endogenous resistance against nematodes and some <italic>Hemiptera</italic> insects. The aim of this study was to screen the presence of dominant/recessive locus of the <italic>Mi-1.2</italic> gene in tomato cultivars with different allelic combination using Mi23 SCAR method and to assess the capacity of the local potato aphid (<italic>Macrosiphum euphorbiae</italic> Thomas) population to develop on different tomato cultivars (dominant and recessive homozygotes in <italic>Mi-1.2</italic> locus). The results showed that both Mi23 marker and potato aphid performance are relevant methods in screening tomato cultivars with a different allelic combination of <italic>Mi-1.2</italic> gene. The assessment of biological potential of <italic>M. euphorbiae</italic> proved that, in comparison with control (tomato plants with recessive alleles of <italic>Mi-1.2</italic> gene), the aphid mortality increased 9- and 4 - fold (in the first and second experimental series, respectively) and the female longevity decreased 3 - fold when fed on tomato cvs with dominant alleles of <italic>Mi-1.2</italic> gene. Furthermore, the resistance against aphids manifests as an antibiosis mechanism in tomato plants carrying dominant alleles.</p></abstract>

Mi-1.2 gene, expressed in tomato plants, contributes to endogenous resistance against nematodes and some Hemiptera insects. The aim of this study was to screen the presence of dominant/recessive locus of the Mi-1.2 gene in tomato cultivars with different allelic combination using Mi23 SCAR method and to assess the capacity of the local potato aphid (Macrosiphum euphorbiae Thomas) population to develop on different tomato cultivars (dominant and recessive homozygotes in Mi-1.2 locus). The results showed that both Mi23 marker and potato aphid performance are relevant methods in screening tomato cultivars with a different allelic combination of Mi-1.2 gene. The assessment of biological potential of M. euphorbiae proved that, in comparison with control (tomato plants with recessive alleles of Mi-1.2 gene), the aphid mortality increased 9- and 4 - fold (in the first and second experimental series, respectively) and the female longevity decreased 3 - fold when fed on tomato cvs with dominant alleles of Mi-1.2 gene. Furthermore, the resistance against aphids manifests as an antibiosis mechanism in tomato plants carrying dominant alleles.

Relevance of the Mi23 Marker and the Potato Aphid Biology as Indicators of Tomato Plant (<italic>Solanum lycopersicum</italic> L.) Resistance to Some Pests

Departament of Applied Entomology, Warsaw University of Life Sciences - SGGW, 02-776 Warsaw, Nowoursynowska 159, Poland

Department of Genetics, Breeding and Biotechnology, Research Institute of Vegetable Crops, 96-100 Skierniewice, Konstytucji 3 Maja 1/3, Poland

Journal of Fruit and Ornamental Plant Research

Relevance of the Mi23 Marker and the Potato Aphid Biology as Indicators of Tomato Plant ( L.) Resistance to Some Pests

Mi-1.2 gene, expressed in tomato plants, contributes to endogenous resistance against nematodes and some Hemiptera insects. The aim of this study was to screen...

Relevance of the Mi23 Marker and the Potato Aphid Biology as Indicators of Tomato Plant (Solanum lycopersicum L.) Resistance to Some Pests

Publié en ligne: 16 juil. 2010

Pages: 25 - 33

DOI: https://doi.org/10.2478/v10032-010-0003-1

Mots clés
L., gene, SCAR Mi23 marker Thomas

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