| Autor: |
Godzina, Monika, Staniaszek, Miroslawa, Kielkiewicz, Malgorzata |
| Zdroj: |
Journal of Horticultural Research; January 2010, Vol. 72 Issue: 1 p25-33, 9p |
| Abstrakt: |
Mi-1.2gene, expressed in tomato plants, contributes to endogenous resistance against nematodes and some Hemipterainsects. The aim of this study was to screen the presence of dominant/recessive locus of the Mi-1.2gene in tomato cultivars with different allelic combination using Mi23 SCAR method and to assess the capacity of the local potato aphid (Macrosiphum euphorbiaeThomas) population to develop on different tomato cultivars (dominant and recessive homozygotes in Mi-1.2locus). 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-1.2gene. The assessment of biological potential of M. euphorbiaeproved that, in comparison with control (tomato plants with recessive alleles of Mi-1.2gene), 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-1.2gene. Furthermore, the resistance against aphids manifests as an antibiosis mechanism in tomato plants carrying dominant alleles. |
| Databáze: |
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