| Title: |
On the way to diploidization and unexpected ploidy in the grass Sporobolus section Spartina mesopolyploids |
| Authors: |
Salmon, Armel; Hao, Yan; Milin, Morgane; Lima, Oscar; Cave-Radet, Armand; Giraud, Delphine; Cruaud, Corinne; Labadie, Karine; Istace, Benjamin; Belser, Caroline; Aury, Jean-Marc; Wincker, Patrick; Li, Bo; Li, Linfeng; Ainouche, Malika |
| Contributors: |
Ecosystèmes, biodiversité, évolution Rennes (ECOBIO); Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS); Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des sciences de l'environnement de Rennes (OSERen); Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE); Fudan University Shanghai; Genoscope - Centre national de séquençage Evry (GENOSCOPE); Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Laboratoire de Bioinformatique pour la Génomique et la Biodiversité (LBGB); Génomique métabolique (UMR 8030); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS)-Genoscope - Centre national de séquençage Evry (GENOSCOPE); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS); Laboratoire d'Analyses Génomiques des Eucaryotes (LAGE); Yunnan University; This work was conducted in the framework of a collaborative project (Interuniversity Convention) between the University of Rennes (France) and the Fudan University of Shanghai (China). The authors in China were financially supported by the National Key Research and Development Program of China (2022YFC2601100), the National Natural Science Foundation of China (31961133028), and the Department of Science and Technology of Yunnan Province (202405AS350011) to B.L. The authors in France acknowledge funding from UMR 6553 Ecology, Biodiversity and Evolution (Ecobio - Univ Rennes - CNRS to M.A., A.S., O.L.), support from University of Rennes (PhD grant to M. M.), support from Genoscope, CEA, France Génomique (ANR-10-INBS-0009–08 to P.W), and from the CNRS - Rennes University funded International Research Network (IRN) Polyploidy and Biodiversity (POLYDIV) to M.A. C.; ANR-10-INBS-0009,France Génomique,Organisation et montée en puissance d'une Infrastructure Nationale de Génomique(2010) |
| Source: |
ISSN: 2041-1723. |
| Publisher Information: |
CCSD; Nature Publishing Group |
| Publication Year: |
2025 |
| Collection: |
Archive Ouverte de l'Université Rennes (HAL) |
| Subject Terms: |
Sporobolus; genomic; genome duplication; evolution; speciation; Diploidization; [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
| Description: |
International audience ; Plant history is characterized by cyclical whole genome duplication and diploidization with important biological and ecological consequences. Here, we explore the genome history of two related iconic polyploid grasses (Sporobolus alterniflorus and S. maritimus), involved in a well-known example of neopolyploid speciation. We report particular genome dynamics where an ancestral Sporobolus genome (n = 2x = 20) duplicated 9.6-24.4 million years ago (MYA), which was followed by descending dysploidy resulting in a genome with an unexpected base chromosome number (n = 15). This diploidized genome duplicated again 2.1-6.2 MYA to form a tetraploid lineage (2n = 4x = 60), thus reshuffling the ploidy of these species previously thought hexaploids. We also elucidate the mechanism accompanying the speciation between S. maritimus (2n = 60) and S. alterniflorus (2n = 62), resulting from chromosome restructuring, and identify key adaptive genes in the corresponding regions. This represents critical findings to decipher molecular mechanisms underlying species expansion, adaptation to environmental challenge and invasiveness. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://doi.org/10.6084/m9.figshare.28359035; https://doi.org/10.6084/m9.figshare.28359044; info:eu-repo/semantics/altIdentifier/pmid/40011479; PUBMED: 40011479 |
| DOI: |
10.1038/s41467-025-56983-8 |
| Availability: |
https://hal.science/hal-04976572; https://hal.science/hal-04976572v1/document; https://hal.science/hal-04976572v1/file/s41467-025-56983-8.pdf; https://doi.org/10.1038/s41467-025-56983-8 |
| Rights: |
http://creativecommons.org/licenses/by-nc-nd/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.F3D26EC3 |
| Database: |
BASE |