Late-acting self-incompatible system, preferential allogamy and delayed selfing in the heteromorphic invasive populations of <i>Ludwigia grandiflora subsp. hexapetala</i>

International audienc

Etude de facteurs environnementaux et genetiques de l'androgenese in vitro chez le maies (Zea mays L.). Caracterisation des lignees haploiedes doublees

SIGLEINIST T 72771 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Challenges of genomic data generation for non-model complex species

International audienc

Challenges of genomic data generation for non-model complex species

International audienc

De Novo Hybrid Assembly Unveils Multi-Chromosomal Mitochondrial Genomes in Ludwigia Species, Highlighting Genomic Recombination, Gene Transfer, and RNA Editing Events

International audienceBiological invasions have been identified as the fifth cause of biodiversity loss, and their subsequent dispersal represents a major ecological challenge. The aquatic invasive species Ludwigia grandiflora subsp. hexapetala (Lgh) and Ludwigia peploides subsp. montevidensis (Lpm) are largely distributed in aquatic environments in North America and in Europe. However, they also present worrying terrestrial forms that are able to colonize wet meadows. To comprehend the mechanisms of the terrestrial adaptation of Lgh and Lpm, it is necessary to develop their genomic resources, which are currently poorly documented. We performed de novo assembly of the mitogenomes of Lgh and Lpm through hybrid assemblies, combining short reads (SR) and/or long reads (LR) before annotating both mitogenomes. We successfully assembled the mitogenomes of Lgh and Lpm into two circular molecules each, resulting in a combined total length of 711,578 bp and 722,518 bp, respectively. Notably, both the Lgh and Lpm molecules contained plastome-origin sequences, comprising 7.8% of the mitochondrial genome length. Additionally, we identified recombinations that were mediated by large repeats, suggesting the presence of multiple alternative conformations. In conclusion, our study presents the first high-quality mitogenomes of Lpm and Lgh, which are the only ones in the Myrtales order found as two circular molecules

Réponses des plantes invasives [i]Ludwigia grandiflora[/i] et [i]Ludwigia peploides[/i] sous conditions de stress hydrique et salin

absen

GenAPoPop1.0: Computing population genetic indices and inferring reproductive modes from genotype diversity in polyploid populations.

International audienceUnderstanding the ecological and evolutionary impacts of polyploidy, especially on reproductive modes, implies to be able to easily compute population genetic indices and to quantitatively infer the respective rates of clonality, selfing and outcrossing producing current descendants

GenAPoPop1.0: Computing population genetic indices and inferring reproductive modes from genotype diversity in polyploid populations.

International audienceUnderstanding the ecological and evolutionary impacts of polyploidy, especially on reproductive modes, implies to be able to easily compute population genetic indices and to quantitatively infer the respective rates of clonality, selfing and outcrossing producing current descendants

Réponses des plantes invasives [i]Ludwigia grandiflora[/i] et [i]Ludwigia peploides[/i] sous conditions de stress hydrique et salin

absen

Etude de la plasticité de la plante aquatique invasive [i]Ludwigia grandiflora[/i] en milieu terrestre

Session 1 : Scénarios et Potentiel InvasifNational audienc