Phylogeny and intraspecific variability of holoparasitic Orobanche (Orobanchaceae) inferred from plastid rbcL sequences

Molecular Phylogenetics and Evolution
Jean-François ManenGerald M Schneeweiss

Abstract

The rbcL sequences of 106 specimens representing 28 species of the four recognized sections of Orobanche were analyzed and compared. Most sequences represent pseudogenes with premature stop codons. This study confirms that the American lineage (sects. Gymnocaulis and Myzorrhiza) contains potentially functional rbcL-copies with intact open reading frames and low rates of non-synonymous substitutions. For the first time, this is also shown for a member of the Eurasian lineage, O. coerulescens of sect. Orobanche, while all other investigated species of sects. Orobanche and Trionychon contain pseudogenes with distorted reading frames and significantly higher rates of non-synonymous substitutions. Phylogenetic analyses of the rbcL sequences give equivocal results concerning the monophyly of Orobanche, and the American lineage might be more closely related to Boschniakia and Cistanche than to the other sections of Orobanche. Additionally, species of sect. Trionychon phylogenetically nest in sect. Orobanche. This is in concordance with results from other plastid markers (rps2 and matK), but in disagreement with other molecular (nuclear ITS), morphological, and karyological data. This might indicate that the ancestor of sect. Trionycho...Continue Reading

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Citations

Aug 20, 2011·Science·Itay MayroseSarah P Otto
May 17, 2008·Journal of Plant Research·Jeong-Mi ParkGerald M Schneeweiss
Apr 21, 2009·Molecular Ecology·C J ThorogoodS J Hiscock
Mar 26, 2016·Frontiers in Plant Science·Peter TóthHarro Bouwmeester
Nov 23, 2006·Molecular Phylogenetics and Evolution·Jeong-Mi ParkGerald M Schneeweiss
Apr 1, 2008·Molecular Phylogenetics and Evolution·Craig F Barrett, John V Freudenstein
Jul 22, 2017·The New Phytologist·Thomas W A BraukmannJohn V Freudenstein
Dec 27, 2016·Frontiers in Plant Science·Mathieu RollandPhilippe Delavault

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