Molecular Plant-Microbe Interactions, Volume (24), No (4), Year (2011-4) , Pages (441-450)

Title : ( Linked, if not the same, Mi-1 homologues confer resistance to tomato powdery mildew and root-knot nematodes )

Authors: Alireza Seifi , Kaloshian I , Vossen J , Che D , Bhattarai K.K , Fan J , Naher Z , Goverse A , Tjallingii F , Lindhout P , Visser R.G.F , Bai Y ,

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On the short arm of tomato chromosome 6, a cluster of disease resistance (R) genes have 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 (NIL) harboring Ol-4 (NIL-Ol-4) and Ol-6 (NIL-Ol-6) are also resistant to nematodes and aphids. Genetically, the resistance to nematodes cosegregates with Ol-4 and Ol-6, which are further fine-mapped to the Mi-1 cluster. We provide evidence that the composition of Mi-1 homologues in NIL-Ol-4 and NIL-Ol-6 is different from other nematode-resistant tomato lines, Motelle and VFNT, harboring the Mi-1 gene. Furthermore, we demonstrate that the resistance to both nematodes and tomato powdery mildew in these two NIL is governed by linked (if not the same) Mi-1 homologues in the Mi-1 gene cluster. Finally, we discuss how Solanum crops exploit Mi-1 homologues to defend themselves against distinct pathogens.

Keywords

, Mi-1 gene, tomato, Oidium neolycopersici, root-knot nematode, resistance
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@article{paperid:1044711,
author = {Seifi, Alireza and Kaloshian I and Vossen J and Che D and Bhattarai K.K and Fan J and Naher Z and Goverse A and Tjallingii F and Lindhout P and Visser R.G.F and Bai Y},
title = {Linked, if not the same, Mi-1 homologues confer resistance to tomato powdery mildew and root-knot nematodes},
journal = {Molecular Plant-Microbe Interactions},
year = {2011},
volume = {24},
number = {4},
month = {April},
issn = {0894-0282},
pages = {441--450},
numpages = {9},
keywords = {Mi-1 gene; tomato; Oidium neolycopersici; root-knot nematode; resistance gene},
}

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%0 Journal Article
%T Linked, if not the same, Mi-1 homologues confer resistance to tomato powdery mildew and root-knot nematodes
%A Seifi, Alireza
%A Kaloshian I
%A Vossen J
%A Che D
%A Bhattarai K.K
%A Fan J
%A Naher Z
%A Goverse A
%A Tjallingii F
%A Lindhout P
%A Visser R.G.F
%A Bai Y
%J Molecular Plant-Microbe Interactions
%@ 0894-0282
%D 2011

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