Plant Biol (Stuttg) 2006; 8(4): 470-485
DOI: 10.1055/s-2006-924043
Research Paper

Georg Thieme Verlag Stuttgart KG · New York

Heterogeneity of Three Molecular Data Partition Phylogenies of Mints Related to M. × piperita (Mentha; Lamiaceae)

V. Gobert1 , 3 , S. Moja1 , P. Taberlet2 , M. Wink3
  • 1Faculté des Sciences et Techniques, Laboratoire de Biotechnologies Végétales Appliquées aux Plantes Aromatiques et Médicinales (LBVPAM) EA3061, Université Jean Monnet, 23 rue du Docteur Paul Michelon, 42023 Saint-Etienne Cedex 02, France
  • 2Laboratoire d'Ecologie Alpine (LECA), UMR CNRS 5553, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 09, France
  • 3Institut für Pharmazie und Molekulare Biotechnologie, Universität Heidelberg, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
Further Information

Publication History

Received: September 15, 2005

Accepted: February 17, 2006

Publication Date:
01 June 2006 (online)

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Abstract

Phylogenetic reconstructions with molecular tools are now widely used, thanks to advances in PCR and sequencing technologies. The choice of the molecular target still remains a problem because too few comparative data are available. This is particularly true for hybrid taxa, where differential introgression of genome parts leads to incongruity between data sets. We have studied the potential of three data partitions to reconstruct the phylogeny of mints related to M. × piperita. These included nuclear DNA (ITS), chloroplast DNA (non-coding regions trnL intron, intergenic spacers trnL-trnF, and psbA-trnH), and AFLP and ISSR, markers. The taxonomic sampling was composed of hybrids, diploid and polyploid genomes. Since the genealogy of cultivated mint hybrids is known, they represent a model group to compare the usefulness of various molecular markers for phylogeny inference. Incongruities between ITS, chloroplast DNA, and AFLP-ISSR phylogenetic trees were recorded, although DNA fingerprinting data were congruent with morphological classification. Evidence of chloroplast capture events was obtained for M. × piperita. Direct sequencing of ITS led to biased results because of the existence of pseudogenes. Sequencing of cloned ITS further failed to provide evidence of the existence of the two parental copy types for M. × piperita, a sterile hybrid that has had no opportunity for concerted evolution of ITS copies. AFLP-ISSR data clustered M. × piperita with the parent that had the largest genome. This study sheds light on differential of introgression of different genome regions in mint hybrids.

References

S. Moja

Faculté des Sciences et Techniques
Laboratoire de Biotechnologies Végétales Appliquées aux Plantes Aromatiques et Médicinales (LBVPAM) EA3061
Université Jean Monnet

23 rue du Docteur Paul Michelon

42023 Saint-Etienne Cedex 02

France

Email: sandrine.moja@univ-st-etienne.fr

Editor: H. de Kroon