Yann Dussert

• PhD
• Researcher at Genoscope

Enset is a staple crop for over 20 million people in southwestern Ethiopia. We generated a new chromosome-level genome assembly, and sequenced 65 wild and 658 cultivated individuals. We unexpectedly find that 214 cultivated individuals are triploid, from multiple origins. Landrace names consistently differentiate diploids from the triploids, which...

The mechanisms underlying within-host diversification in parasite populations are still poorly understood. Yet, diversification in parasite phenotype and genotype may have important clinical and epidemiological consequences. Our aim was to determine if the constraints associated with the infection of different host tissues lead to the emergence and...

Mating types are self-incompatibility systems that promote outcrossing in plants, fungi and oomycetes. Mating-type genes have been widely studied in plants and fungi, but have yet to be identified in oomycetes, eukaryotic organisms closely related to brown algae that cause many destructive animal and plant diseases. We identified the mating-type lo...

Downy mildews are obligate biotrophic oomycete pathogens that cause devastating plant diseases on economically important crops. Plasmopara viticola is the causal agent of grapevine downy mildew, a major disease in vineyards worldwide. We sequenced the genome of Pl. viticola with PacBio long reads and obtained a new 92.94 Mb assembly with high conti...

Clonal propagation enables favourable crop genotypes to be rapidly selected and multiplied. However, the absence of sexual propagation can lead to low genetic diversity and accumulation of deleterious mutations, which may eventually render crops less resilient to pathogens or environmental change. To better understand this trade-off, we characteriz...

Clonal propagation enables favourable crop genotypes to be rapidly selected and multiplied. However, the absence of sexual propagation can lead to low genetic diversity and accumulation of deleterious mutations, which may eventually render crops less resilient to pathogens or environmental change. To better understand this trade-off, we characteris...

Dataset of Fontaine et al. 2021 "Europe as a bridgehead in the worldwide invasion history of grapevine downy mildew, Plasmopara viticola".

Europe is the historical cradle of viticulture, but grapevines (Vitis vinifera) have been increasingly threatened by pathogens of American origin. The invasive oomycete Plasmopara viticola causes downy mildew, one of the most devastating grapevine diseases worldwide. Despite major economic consequences, its invasion history remains poorly understoo...

Supplementary resources of Fontaine et al. 2021 "Europe as a bridgehead in the worldwide invasion history of grapevine downy mildew, Plasmopara viticola".

Europe is the historical cradle of viticulture, but grapevines have been increasingly threatened by pathogens of American origin. The invasive oomycete Plasmopara viticola causes downy mildew, one of the most devastating grapevine diseases worldwide. Despite major economic consequences, its invasion history remains poorly understood. Comprehensive...

Mating types are self-incompatibility systems that promote outcrossing in plants, fungi, and oomycetes. Mating-type genes have been widely studied in plants and fungi but have yet to be identified in oomycetes, eukaryotic organisms closely related to brown algae that cause many destructive animal and plant diseases. We identified the mating-type lo...

Supplementary material for "A high-quality grapevine downy mildew genome assembly reveals rapidly evolving and lineage-specific putative host adaptation genes"

Downy mildews are obligate biotrophic oomycete pathogens that cause devastating plant diseases on economically important crops. Plasmopara viticola is the causal agent of grapevine downy mildew, a major disease in vineyards worldwide. We sequenced the genome of Pl. viticola with PacBio long reads and obtained a new 92.94 Mb assembly with high conti...

Despite of a growing interest in considering the role of sociological factors in seed exchanges and their consequences on the evolutionary dynamics of agro-biodiversity, very few studies assessed the link between ethno-linguistic diversity and genetic diversity patterns in small-holder farming systems. This is key for optimal improvement and conser...

Table S1. Genetic sampling summary. Table S2. Number of samples collected for each sorghum and pearl millet named variety and number of farms where they were collected (between brackets) for each site. Table S3. Summary of information and genetic diversity estimates per locus. Table S4. Pairwise FST values between sites for pearl millet Figure...

Plasmopara viticola is a biotrophic pathogenic oomycete responsible for grapevine downy mildew. We present here the first draft of the P. viticola genome. Analysis of this sequence will help in understanding plant-pathogen interactions in oomycetes, especially pathogen host specialization and adaptation to host resistance.

Crop populations in smallholder farming systems are shaped by the interaction of biological, ecological and social processes, occurring on different spatiotemporal scales. Understanding these dynamics is fundamental for the conservation of crop genetic resources. In this paper we investigated the processes involved in sorghum and pearl millet diver...

Poster presenting preliminary results about population genomics of Plasmopara viticola

Pearl millet (Pennisetum glaucum) is a staple crop in Sahelian Africa. Farmers usually grow varieties with different cycle lengths and complementary functions in Sahelian agrosystems. Both the level of genetic differentiation of these varieties and the domestication history of pearl millet has been poorly studied. We investigated the neutral geneti...

Le mil est une céréale domestiquée, cultivée dans la zone soudano-sahélienne en Afrique. Il constitue la base alimentaire dans de nombreux pays de cette zone. Lors de ma thèse, j’ai étudié le processus de domestication chez cette espèce à différents niveaux (du gène à la population). A ce jour, aucun consensus clair concernant l'histoire de la dome...

A comparative analysis of the relationships between ethno-linguistic and genetic diversities has been carried out in the Lake Chad basin, on pearl millet, sorghum and Bambara groundnut varieties. Results suggest the hypothesis of a coincidence in spatial distribution of farmers social groups and pearl millet genetic groups, despite its outcrossing...

Unravelling the mechanisms involved in adaptation to understand plant morphological evolution is a challenging goal. For crop species, identification of molecular causal polymorphisms involved in domestication traits is central to this issue. Pearl millet, a domesticated grass mostly found in semi-arid areas of Africa and India, is an interesting m...

On Feb 15, 2013 this sequence version replaced gi:429460751.