Étienne Danchin
A5036519584- Nematode management and characterization studies
- Legume Nitrogen Fixing Symbiosis
- Genomics and Phylogenetic Studies
- Chromosomal and Genetic Variations
- Avian ecology and behavior
- Insect symbiosis and bacterial influences
- Parasite Biology and Host Interactions
- Wildlife Ecology and Conservation
- Protist diversity and phylogeny
- Animal Behavior and Reproduction
- Plant Parasitism and Resistance
- Soybean genetics and cultivation
- Insect Resistance and Genetics
- Genetic diversity and population structure
- Evolution and Genetic Dynamics
- Plant and animal studies
- Enzyme Production and Characterization
- Biofuel production and bioconversion
- Peanut Plant Research Studies
- Mycorrhizal Fungi and Plant Interactions
- Entomopathogenic Microorganisms in Pest Control
- Viral Infectious Diseases and Gene Expression in Insects
- Plant Pathogens and Fungal Diseases
- Studies on Chitinases and Chitosanases
- Genetic and phenotypic traits in livestock
Institut Sophia Agrobiotech
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2025
Université Côte d'Azur
2013-2025
Genoscope
2023
Biotech (Brazil)
2023
Brazilian Agricultural Research Corporation
2020
Université de Toulouse
2009-2019
Observatoire de la Côte d’Azur
2017-2019
Laboratoire Evolution et Diversite Biologique
2008-2019
Fusarium species are among the most important phytopathogenic and toxigenic fungi. To understand molecular underpinnings of pathogenicity in genus Fusarium, we compared genomes three phenotypically diverse species: graminearum, verticillioides oxysporum f. sp. lycopersici. Our analysis revealed lineage-specific (LS) genomic regions F. that include four entire chromosomes account for more than one-quarter genome. LS rich transposons genes with distinct evolutionary profiles but related to...
Trichoderma reesei is the main industrial source of cellulases and hemicellulases used to depolymerize biomass simple sugars that are converted chemical intermediates biofuels, such as ethanol. We assembled 89 scaffolds (sets ordered oriented contigs) generate 34 Mbp nearly contiguous T. genome sequence comprising 9,129 predicted gene models. Unexpectedly, considering utility effectiveness carbohydrate-active enzymes reesei, its encodes fewer than any other sequenced fungus able hydrolyze...
Plant-parasitic nematodes are major agricultural pests worldwide and novel approaches to control them sorely needed. We report the draft genome sequence of root-knot nematode Meloidogyne incognita, a biotrophic parasite many crops, including tomato, cotton coffee. Most assembled this asexually reproducing nematode, totaling 86 Mb, exists in pairs homologous but divergent segments. This suggests that ancient allelic regions M. incognita evolving toward effective haploidy, permitting new...
The filamentous fungus Aspergillus niger is widely exploited by the fermentation industry for production of enzymes and organic acids, particularly citric acid. We sequenced 33.9-megabase genome A. CBS 513.88, ancestor currently used enzyme strains. A high level synteny was observed with other aspergilli sequenced. Strong function predictions were made 6,506 14,165 open reading frames identified. detailed description components protein secretion pathway striking differences in hydrolytic...
The fungus Laccaria bicolor — seen in its above-ground fruiting body presence as the 'bicoloured deceiver' mushroom lives symbiotically on roots of trees. Its genome has now been sequenced, and key features characterized by transcript profiling. study throws light mechanism mycorrhizal symbiosis, union soil fungi that is vital important to plant productivity. And it will be keen interest evolutionary biologists for revelations about plant–fungus interactions shaping genomes over time....
Sclerotinia sclerotiorum and Botrytis cinerea are closely related necrotrophic plant pathogenic fungi notable for their wide host ranges environmental persistence. These attributes have made these species models understanding the complexity of necrotrophic, broad host-range pathogenicity. Despite similarities, two differ in mating behaviour ability to produce asexual spores. We sequenced genomes one strain S. strains B. cinerea. The comparative analysis relative another other fungal is...
Family GH13, also known as the α-amylase family, is largest sequence-based family of glycoside hydrolases and groups together a number different enzyme activities substrate specificities acting on α-glycosidic bonds. This polyspecificity results in fact that simple membership this cannot be used for prediction gene function based sequence alone. In order to establish robust show an improved correlation between enzymatic specificity, we have performed large-scale analysis 1691 GH13 sequences...
According to the “public information” hypothesis, some animal species may monitor current reproductive success of conspecifics assess local habitat quality and choose their own subsequent breeding site. To test this hypothesis experimentally, we manipulated two components public information, mean number offspring raised locally (“quantity”) condition (“quality”), in collared flycatcher Ficedula albicollis . Immigration rate decreased with quantity but did not depend on quality, suggesting...
The ascomycetous fungus Nectria haematococca, (asexual name Fusarium solani), is a member of group >50 species known as the "Fusarium solani complex". Members this complex have diverse biological properties including ability to cause disease on >100 genera plants and opportunistic infections in humans. current research analyzed most extensively studied complex, N. haematococca mating population VI (MPVI). Several genes controlling individual isolates colonize specific habitats are located...
The genome of the asexual rotifer Adineta vaga lacks homologous chromosomes; instead, its allelic regions are rearranged and sometimes found on same chromosome in a palindromic fashion, structure reminiscent primate Y other mitotic lineages such as cancer cells. Bdelloid rotifers thought to have persisted diversified asexually for millions years, which is odd because loss sexual reproduction widely considered be an evolutionary dead end metazoans. suspicion remained that they might engage...
Abstract Background The dung-inhabiting ascomycete fungus Podospora anserina is a model used to study various aspects of eukaryotic and fungal biology, such as ageing, prions sexual development. Results We present 10X draft sequence P. genome, linked the sequences large expressed tag collection. Similar higher eukaryotes, transcription/splicing machinery generates numerous non-conventional transcripts. Comparison genome orthologous gene set with one its close relatives, Neurospora crassa ,...
Lateral gene transfer from prokaryotes to animals is poorly understood, and the scarce documented examples generally concern genes of uncharacterized role in receiver organism. In contrast, plant-parasitic nematodes, several genes, usually not found similar bacterial homologs, play essential roles for successful parasitism. Many these encode plant cell wall-degrading enzymes that constitute an unprecedented arsenal terms both abundance diversity. Here we report independent lateral transfers...
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 which were acquired by horizontal gene transfer, to manipulate host processes and promote parasitism. G. rostochiensis classified into pathotypes with different resistance-breaking phenotypes. We generate high quality genome assembly for pathotype Ro1, identify putative transfer events, map expression...
Root-knot nematodes (genus Meloidogyne) exhibit a diversity of reproductive modes ranging from obligatory sexual to fully asexual reproduction. Intriguingly, the most widespread and devastating species global agriculture are those that reproduce asexually, without meiosis. To disentangle this surprising parasitic success despite absence sex genetic exchanges, we have sequenced assembled genomes three ameiotic Meloidogyne. We compared them relatives able perform meiosis show Meloidogyne...
Carbohydrate-active enzymes involved in the degradation of plant cell walls and/or assimilation carbohydrates for energy uptake are widely distributed microorganisms. In contrast, they less frequent animals, although there exceptions, including examples carbohydrate-active acquired by horizontal gene transfer from bacteria or fungi several phytophagous arthropods and plant-parasitic nematodes. Although whitefly Bemisia tabaci is a major agricultural pest, knowledge transfer-acquired this...
Understanding evolutionary consequences of intermittent breeding (nonbreeding in individuals that previously bred) requires investigation the relationships between adult state and two demographic parameters: survival probability subsequent probability. One major difficulty raised by comparing features breeders nonbreeders as estimated from capture–recapture data is often suspected to influence recapture or resighting We used multistate models test hypothesis equal probabilities for...
We investigated if one category of birds, prospectors, i.e. those likely to seek future breeding sites, attempt gather information on the local reproductive success their conspecifics. If prospecting is an important information-gathering process, it should occur when reliable estimation can be made. tested this prediction in a colonial seabird, Kittiwake Rissa tridactyla, by monitoring number prospectors and value available series cliffs during two seasons. found that bulk occurred best was...
Summary Public information, i.e. local reproductive performance of conspecifics, is expected to be a highly valuable cue for breeding habitat selection. However, the access this may spatially and temporally constrained. When public information unavailable, individuals use other integrative cues, such as density breeders. Departure decisions collared flycatchers ( Ficedula albicollis ) were shown previously related both density, in long‐term correlative study fragmented population. Here, we...
Microsatellite flanking regions have been compared in two butterfly species. Several microsatellite showed high similarity to one another among different microsatellites within a same species, but very few similarities were found between This can be the consequence of either duplication/multiplication events involving large containing or imbedded minisatellite regions. The multiplication might also linked mobile elements. Furthermore, crossing over nonhomologous lead exchange...
• The plant plasma membrane-localized NADPH oxidases, known as respiratory burst oxidase homologues (RBOHs), appear to play crucial roles in growth and development. They are involved important processes, such root hair growth, defence reactions abscisic acid signalling. Using sequence similarity searches, we identified seven putative RBOH-encoding genes the Medicago truncatula genome. A phylogenetic reconstruction showed that Rboh gene duplications occurred legume species. We analysed...