Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 400207
Title Linked, if not the same, Mi-1 homologues confer resistance to tomato powdery mildew and root-knot nematodes
Author(s) Seifi Abdolabad, A.R.; Kaloshian, I.; Vossen, J.; Che, D.; Bhattarai, K.; Fan, J.; Naher, Z.; Goverse, A.; Tjallingii, W.F.; Lindhout, P.; Visser, R.G.F.; Bai, Y.
Source Molecular Plant-Microbe Interactions 24 (2011)4. - ISSN 0894-0282 - p. 441 - 450.
Department(s) Laboratory of Plant Breeding
WUR Plant Breeding
Laboratory of Nematology
Laboratory of Entomology
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) neighbor-joining method - heat-stable resistance - molecular linkage map - disease resistance - gene mi - lycopersicon-peruvianum - meloidogyne-incognita - potato aphid - defense - pathogens
Abstract On the short arm of tomato chromosome 6, a cluster of disease resistance (R) has evolved harboring the Mi-1 and Cf genes. The Mi-1 gene confers resistance to root-knot nematodes, aphids and whiteflies. Previously we mapped two genes, Ol-4 and Ol-6 for resistance to tomato powdery mildew in this cluster. The aim of this study was to investigate whether Ol-4 and Ol-6 are homologues of the R genes located in this cluster. We show that near-isogenic lines (NILs) harboring Ol-4 (NIL-Ol-4) and Ol-6 (NIL-Ol-6) are also resistant to nematodes and aphids. Genetically, the resistance to nematodes co-segregates with Ol-4 and Ol-6, which are further fine-mapped to the Mi-1 cluster. We provide evidence that the composition of Mi homologues in NIL-Ol-4 and NIL-Ol-6 are different from other nematode-resistant tomato lines, Motelle and VFNT harboring the Mi-1 gene. Furthermore, we demonstrate that the resistances to both nematodes and tomato powdery mildew in these two NILs are governed by linked (if not the same) Mi-1 homologues in the Mi-1 cluster. Finally, how Solanum crops exploit Mi-1 homologues to defend themselves against distinct pathogens is discussed.
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