Sequence of the Mitochondrial Genome of Suggests an Unexpected Role in 's Evolution.
Fiche publication
Date publication
janvier 2021
Journal
Frontiers in plant science
Auteurs
Membres identifiés du Cancéropôle Est :
Mme KOECHLER Sandrine
Tous les auteurs :
Fertet A, Graindorge S, Koechler S, de Boer GJ, Guilloteau-Fonteny E, Gualberto JM
Lien Pubmed
Résumé
The involvement of the different species in the domestication and diversification of cultivated lettuce is not totally understood. is considered as the direct ancestor and the closest relative to , while the other wild species that can be crossed with , , and , would have just contributed to the latter diversification of cultivated typologies. To contribute to the study of evolution, we assembled the mtDNA genomes of nine spp. accessions, among them three from , whose mtDNA had not been studied so far. Our results unveiled little to no intraspecies variation among species, with the exception of where the accessions we sequenced diverge significantly from the mtDNA of a accession already reported. Furthermore, we found a remarkable phylogenetic closeness between the mtDNA of and the mtDNA of , contrasting to the origin of the nuclear and plastidial genomes. These results suggest that a cross between and the ancestor of cultivated lettuce is at the origin of the actual mitochondrial genome of
Mots clés
Lactuca saligna, Lactuca serriola, Lactuca virosa, genome evolution, lettuce, mitochondrial genome
Référence
Front Plant Sci. 2021 ;12:697136