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Identification de nouveaux régulateurs de la taille des fruits dans une collection de mutants EMS de rendement chez tomate

hal.structure.identifierReproduction et développement des plantes [RDP]
dc.contributor.authorHOANG, Gabriel
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorJUST, Daniel
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorPOLD, Claire
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorGADIN, Stéphanie
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorMAUXION, Jean-Philippe
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorROTHAN, Christophe
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorGONZALEZ, Nathalie
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorFERNANDEZ-LOCHU, Lucie
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorLEMAIRE- CHAMLEY, Martine
dc.date.conference2025-09-22
dc.description.abstractEnFruit size is a complex trait determined by cell division and expansion. While these core cellular processes are controled by genetic factors, they are also greatly dependent on plant vegetative features and physiology, which determine the source/sink relationship within the plant, and on the environmental context. In the past, the exploration of tomato natural variability successfully revealed fruit weight alleles related to tomato domestication, and a number of underlying genes were identified. In this work, we searched for novel alleles regulating tomato fruit size in a Micro-Tom EMS mutant collection. P17F7 and P22H3 tomato mutant families presented a steady increase in fruit yield from 13% to 27% associated with larger fruit size and were selected for identification of causal mutations. A mapping-by-sequencing approach using phenotyping of yield-related traits in BC1F2 segregating populations enabled the identification of two loci on chromosomes 4 and 8 positively associated with the increased yield and fruit size in both mutants. In addition, a significant deleterious mutation limiting yield and fruit size was identified on chromosome 9 in P17F7 mutant (y9m allele). Characterization of BC1F3 progenies from homozygous y9WT and y9m BC1F2 plants confirmed the association of the y9m allele with smaller fruit size. Examination of the EMS mutations with potential effect on protein primary sequence led to the identification of a missense candidate mutation. The characterization of genome edited lines is underway and will allow to understand the implication of the underlying candidate gene in fruit size control.
dc.language.isoen
dc.subject.enfruit
dc.subject.enyield
dc.subject.enmutant
dc.subject.entomato
dc.titleIdentification de nouveaux régulateurs de la taille des fruits dans une collection de mutants EMS de rendement chez tomate
dc.title.enIdentification of novel fruit size regulators in a tomato yield EMS mutant collection
dc.typeAutre communication scientifique (congrès sans actes - poster - séminaire...)
dc.subject.halSciences du Vivant [q-bio]
bordeaux.conference.titleSolanaceae and Rubiaceae Genetics and Genomics International Conference 2025
bordeaux.countryIT
bordeaux.conference.cityTurin
bordeaux.peerReviewedoui
hal.identifierhal-05315493
hal.version1
hal.invitednon
hal.proceedingsnon
hal.conference.end2025-09-26
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-05315493v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.title=Identification%20de%20nouveaux%20r%C3%A9gulateurs%20de%20la%20taille%20des%20fruits%20dans%20une%20collection%20de%20mutants%20EMS%20de%20rendement%20chez%20tomate&rft.atitle=Identification%20de%20nouveaux%20r%C3%A9gulateurs%20de%20la%20taille%20des%20fruits%20dans%20une%20collection%20de%20mutants%20EMS%20de%20rendement%20chez%20tomate&rft.au=HOANG,%20Gabriel&JUST,%20Daniel&POLD,%20Claire&GADIN,%20St%C3%A9phanie&MAUXION,%20Jean-Philippe&rft.genre=conference


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