Abstract
Accessions of Lycopersicon peruvianum complex and their F1progenies were screened for genotype specific resistance to Mi-1-avirulent M. incognita and M. javanica biotypes at25 °C and at 32 °C (a temperature at which Mi-1resistance is not expressed), and to Mi-1-virulent M.incognita at 25 °C. All entries of the L. peruvianumChotano-humifusum race accessions LA2157 and LA2334 were resistantto Mi-1-avirulent biotype at 25 °C and at 32 °C,indicating that the accessions are homozygous for the heat-stableresistance. The L. peruvianum Maranon race accessions LA1626,LA1708, LA2172, LA2185, LA2326 and LA2328 segregated for heat-stableresistance to Mi-1-avirulent biotype. The F1 progeny tested ofLA392 × LA2157, LA2334 × LA2157, LA2328 × LA2326,LA2328 × LA2185, LA1708 × LA2328 andLA1626 × LA2172 were resistant to Mi-1-avirulent biotype at32 °C. There were differences in the segregating accessions andF1 hybrids for expression of heat-unstable and heat-stable resistanceto Mi-1-avirulent Meloidogyne spp. The L. peruvianumLA392 and LA2163 and L. chilense LA1968, LA1972, LA2404, LA2405,LA2406, LA2748, LA2930, and the L. peruvianum × L.chilense hybrids were homozygous susceptible with all entries testedsusceptible at 32 °C. Cuttings of these L. peruvianumaccessions and their F1 progenies were susceptible to Mi-1-virulent M. incognita biotype at 25 °C.
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Veremis, J., Roberts, P. Diversity of heat-stable genotype specific resistance to Meloidogyne in Maranon races of Lycopersicon peruvianum complex. Euphytica 111, 9–16 (2000). https://doi.org/10.1023/A:1003776201585
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DOI: https://doi.org/10.1023/A:1003776201585