An Unexplored Diversity for Adaptation of Germination to High Temperatures in <i>Brassica</i> Species
2025
Tiret, M | Wagner, Marie-Hélène | Gay, Laurène | Chenel, Elisa | Dupont, Audrey | Falentin, Cyril | Maillet, Loeiz | Gavory, Frédérick | Labadie, Karine | Ducournau, Sylvie | Chèvre, Anne-Marie | Institut de Génétique, Environnement et Protection des Plantes (IGEPP) ; Université de Rennes (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Rennes Angers ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Station Nationale d’Essais de Semences [Beaucouzé] (SNES) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM) | Génomique métabolique (UMR 8030) ; 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)-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) ; 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) | Institut de Biologie François JACOB (JACOB) ; 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) | The investigation was supported by EU's Horizon 2020 PRIMA funding (grant no. 1425), entitled “BrasExplor: Wide exploration of genetic diversity in Brassica species for sustainable crop production”; by INRAE through the TSARA initiative (Transforming food systems and agriculture through a partnership research with Africa), which fosters Franco-Algerian collaborations; and by the France Génomique National infrastructure, funded as part of the “Investissements d'Avenir” program managed by the 'Agence Nationale pour la Recherche' (contract ANR-10-INBS-0009). | GenOuest bioinformatics platform, Rennes, France (https://www.genouest.org) | ANR-10-INBS-0009,France Génomique,Organisation et montée en puissance d'une Infrastructure Nationale de Génomique(2010)
Data Availability Statement: The short-read resequencing data that support the findings are available in NCBI's sequence read archive (SRA) under the project PRJNA1174687. The genetic files (bed, bim, fam) and the raw phenotype dataset is freely available at: “Tiret, Mathieu, 2025, Replication Data for: An unexplored diversity for adaptation of germination to high temperatures in Brassica species, https://doi.org/10.57745/RIOMJ8.” Seeds of the accessions are available at the following Genetic Resource Centers: BrACySol for French accessions, de Los Campos seed genebank (ESP003) for Spanish accessions, and Agricultural Institute of Slovenia for Slovenian accessions. The unique accession numbers are detailed in Table S3. For inquiries regarding Algerian, Italian, and Tunisian accessions, please refer to the contact specified in Table S3.
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Mostrar más [+] Menos [-]Inglés. Elevated temperatures inhibit the germination of a concerning number of crop species. One strategy to mitigate the impact of warming temperatures is to identify and introgress adaptive genes into elite germplasm. Diversity must be sought in wild populations, coupled with an understanding of the complex pattern of adaptation across a broad range of landscapes. By investigating the landraces, wild, and feral populations of Algeria, Italy, France, Slovenia, Spain, and Tunisia, we assessed the response of germination to temperature increase in an unexplored diversity of 117 accessions of Brassica rapa and 66 of Brassica oleracea. Our results show that both species exhibit heat tolerance to the temperature range tested, especially B. rapa, with an increase in speed and uniformity of germination time, as well as an increase in germination rate as temperature increased. As for B. oleracea accessions, the ability to germinate under heat conditions depended on the geographical origin; in particular, southern populations showed a higher germination rate than northern populations, possibly in relation to their warmer climates of origin. These findings highlight the complex interplay between domestication, feralization, and current agronomic practices in shaping germination characteristics in Brassica species.
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