Reticulate evolution in kiwifruit (Actinidia, Actinidiaceae) identified by comparing their maternal and paternal phylogenies

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 fo...

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Bibliographic Details
Published in:American journal of botany 2004-05, Vol.91 (5), p.736-747
Main Authors: Chat, Joelle, Jauregui, Blanca, Petit, Remy J, Nadot, Sophie
Format: Article
Language:English
Subjects:
Actinidia
Biological taxonomies
chloroplast microsatellites
Chloroplasts
Citrus fruits
Evolution
Evolutionary biology
Genomes
hybridization
Life Sciences
Mitochondrial genes
mitochondrial indels
molecular phylogeny
multiple origin of polyploids
Parsimony
Phylogenetics
Phylogeny
Plants
Systematics
Taxa
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Summary: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 phytogenies (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.
ISSN:0002-9122
1537-2197
DOI:10.3732/ajb.91.5.736