Article Dans Une Revue American Journal of Botany Année : 2004

Dactylorhiza (Orchidaceae) in European Russia: combined molecular and morphological analysis

Résumé

Four plastid and two nuclear (internal transcribed spacer [ITS] ribosomal DNA) markers were used in this study of the Dactylorhiza maculata and D. incarnata complexes (Orchidaceae: Orchidinae) to determine diversity and taxonomic distribution of haplotypes, hybridization frequencies, and maternal parentage of hybrids in 125 samples from 78 populations from European Russia and the Caucasus. A morphometric study of all populations revealed significant correspondence between morphological and plastid DNA data. Most D. maculata sensu stricto (s.s.) specimens from Russia have D. fuchsii haplotypes; this could be evidence for introgression or widespread hybridization between these species in northern Russia. Heterogeneity within populations is much higher for ITS data and is strongly correlated with latitude. Both plastid and nuclear data are significantly correlated with distribution along a south–north axis. Several haplotypes and ITS alleles uncommon in western Europe are more widely distributed in Russia, whereas some frequent haplotypes from western Europe are absent.

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ird-05597503 , version 1 (20-04-2026)

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Alexey Shipunov, Michael Fay, Yohan Pillon, Richard Bateman, Mark Chase. Dactylorhiza (Orchidaceae) in European Russia: combined molecular and morphological analysis. American Journal of Botany, 2004, 91 (9), pp.1419-1426. ⟨10.3732/ajb.91.9.1419⟩. ⟨ird-05597503⟩
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