CHAT, Joëlle; JAUREGUI, Blanca; PETIT, Remy; NADOT, Sophie

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CHAT, Joëlle
Unité de recherches Espèces Fruitières et Vigne [UREFV]

JAUREGUI, Blanca
Unité de recherches Espèces Fruitières et Vigne [UREFV]

PETIT, Remy
Biodiversité, Gènes et Ecosystèmes [BioGeCo]

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Article de revue

Ce document a été publié dans

American Journal of Botany. 2004, vol. 91, n° 5, p. 736-747

Botanical Society of America

Résumé en anglais

Evolutionary relationships within Actinidia, a genus known for the contrasting mode of inheritance of its plastids and mitochondria, were studied. The phylogenetic analysis is based on chloroplast (cp) and mitochondrial (mt) restriction site and sequence data (matK, psbC-trnS, rbcL, and trnL-trnF for cpDNA; nad1-2/3 and nad4-1/2 for mtDNA). The analysis of cp sequence data confirms the hypothesis that the four currently recognized sections are not monophyletic. The detection of incongruences among phylogenies (mtDNA vs. cpDNA tree) coupled with the detection of intraspecific polymorphisms confirms some of the reticulations previously emphasized, diagnoses new hybridization/introgression events, and provides evidence for multiple origin of at least two polyploid taxa. A number of hybridization/introgression events at the diploid, tetraploid, and possibly hexaploid levels are documented. The extensive reticulate evolution undergone by Actinidia could account for the lack of clear morphological discontinuities at the species level< Réduire

Mots clés

MITOCHONDRIAL INDELS

Mots clés en anglais

CHLOROPLAST MICROSATELLITES

HYBRIDIZATION

MOLECULAR PHYLOGENY

MULTIPLE ORIGIN OF POLYPLOIDS

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202