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Introduction
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Publications (50)
Background
Since the banning of chemical products used to control plant-parasitic nematode populations, the use of resistant plants has become the most effective management approach against the potato cyst nematode Globodera pallida. However, some populations, from experimental evolution setups and field samplings, are able to overcome these resist...
The potato cyst nematode Globodera rostochiensis originates from the Andean Mountain region in South America and has unintentionally been introduced to all inhabited continents. Several studies have examined the population genetic structure of this pest in various countries by using microsatellite markers. However, merging microsatellite data produ...
Global trading of plant materials, in combination with agricultural practices, may facilitate the spreading of cyst nematodes to so far non-infected areas. Recently Potato Cyst Nematode (PCN) was recognized to be present in Indonesia and both diversity and distribution require further study. Assessment of PCN populations was done by collecting soil...
Les actions conduites dans le cadre du projet de recherche Nematools visaient à renforcer lesméthodes prophylactiques pour prévenir l’introduction et la dissémination des nématodesphytoparasites réglementés Meloidogyne chitwoodi, M. fallax, Globodera pallida et G. rostochiensis.Ces nématodes constituent des menaces sérieuses pour diverses cultures,...
Our knowledge of the diversity of potato cyst nematodes in their native areas still remains patchy and should be improved. A previous study based on 42 Peruvian Globodera pallida populations revealed a clear south to north phylogeographic pattern, with five well‐supported clades and maximum diversity observed in the south of Peru. In order to inves...
The recent ban of the most efficient chemical nematicides lets growers without method to control the carrot cyst nematode Heterodera carotae. This phytoparasitic nematode species has a very narrow host range and causes severe crop losses in the main carrot‐growing regions worldwide. The development of alternative means of management of H. carotae i...
The cyst nematode Heterodera carotae, which parasitizes carrot roots, has been recorded in many countries in Europe (Italy, The Netherlands, Switzerland, France, Denmark, …), in South Africa and in North America (Canada, USA). To date, there is a lack of knowledge about the genetic structure of the populations of this economically important nematod...
Improving resistance durability involves to be able to predict the adaptation speed of pathogen populations. Identifying the genetic bases of pathogen adaptation to plant resistances is a useful step to better understand and anticipate this phenomenon. Globodera pallida is a major pest of potato crop for which a resistance QTL, GpaVvrn , has been i...
BACKGROUND: The yellow potato cyst nematode, Globodera rostochiensis, is a devastating plant pathogen of global economic importance. This biotrophic parasite secretes effectors from pharyngeal glands, some of which were acquired by horizontal gene transfer, to manipulate host processes and promote parasitism. G. rostochiensis is classified into pat...
In the current agronomical context of pesticide use reduction, deciphering the genetic bases of pathogen adaptation to plant resistances is of major importance to improve their durability. Knowledge of the virulence gene frequencies in pathogens populations could indeed allow the prediction of their durability before deployment. Globodera pallida i...
Background:
The yellow potato cyst nematode, Globodera rostochiensis, is a devastating plant pathogen of global economic importance. This biotrophic parasite secretes effectors from pharyngeal glands, some of which were acquired by horizontal gene transfer, to manipulate host processes and promote parasitism. G. rostochiensis is classified into pa...
In Europe, the stem and bulb nematode Ditylenchus dipsaci has been listed as a quarantine pest by EPPO: without any control, it may cause complete failure of alfalfa crops. Movement of nematodes associated with seeds is considered as the highest-risk pathway for the spread of this pest. Since the 2010 official withdrawal of methyl bromide in Europe...
The Globodera pallida SPRYSEC Gp-Rbp-1 gene encodes a secreted protein which induces effector-triggered immunity (ETI) mediated by the Solanum tuberosum disease resistance gene Gpa2. Nonetheless, it is not known how the Andes orogeny, the richness in Solanum species found along the Cordillera or the introduction of the nematode into Europe have aff...
© 2008 Nature Publishing Group. This article is distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike license. The definitive version was published in Nature Biotechnology 26 (2008): 909-915, doi:10.1038/nbt.1482. Plant-parasitic nematodes are major agricultural pests worldwide and novel approaches to control the...
A technique based on the use of specific primers for polymerase chain reaction (PCR) was developed for the identification
of the stem and bulb nematode belonging to the Ditylenchus dipsaci species complex. The internal transcribed spacer region ITS1 and ITS2, the gene 5.8S and part of genes 18S and 26S of
twenty populations of the D. dipsaci specie...
In order to identify genes involved in pathogenicity, we compared the closely related species Globodera pallida (GP) and Globodera "mexicana" (GM) that have different host ranges and are able to produce viable and fertile hybrids. Three pioneer genes were previously identified as differentially expressed between GP and GM: GPLIA7 and GPLIB3 were fo...
Using a complementary (c)DNA-amplified fragment length polymorphism (AFLP) approach, we investigated differential gene expression linked to resistance mechanisms during the incompatible potato - Globodera pallida interaction. Expression was compared between a resistant and a susceptible potato clone, inoculated or not inoculated with G. pallida. Th...
Ditylenchus dipsaci, the stem nematode of alfalfa (Medicago sativa), Mycosphaerella pinodes, cause of Ascochyta blight in pea (Pisum sativum) and Aphanomyces euteiches, cause of pea root rot, result in major yield losses in French alfalfa and pea crops. These diseases are difficult to control
and the partial resistances currently available are not...
A homologue of a Ran binding protein to microtubules (ranbpm) gene, initially known as IC5, was identified and characterised in second-stage juveniles (J2s) of the potato cyst nematode Globodera pallida. The full-length cDNA (937bp) was obtained by 5′ and 3′ rapid amplification of cDNA ends (RACE) and specific primers were designed to amplify the g...
DNA polymorphism in the Ditylenchus dipsaci complex was investigated using amplified fragment length polymorphism (AFLP) to determine the relationships among populations growing mainly on Vicia faba and to develop diagnostic markers. Twenty-two populations of D. dipsaci originating from different geographical areas and one population of Ditylenchus...
Two main race groups of the stem nematode, Ditylenchus dipsaci, attack Vicia faba. The aim of this work was to evaluate random amplified polymorphic DNA (RAPD) as a source of markers for race identification and variability analysis of D. dipsaci. Thirteen populations of D. dipsaci were tested and one population of both D. myceliophagus and D. destr...
Twenty-five lucerne populations of the Medicago sativa complex, which were either diploid or tetraploid and wild or cultivated, were analysed for their resistance to four different fungal diseases and to stem nematode. Forage quality, including stem digestibility and saponin content, was also tested.Populations varied in susceptibility to the disea...
