Phylogenetic Relationships in Orobanchaceae Inferred From Low-Copy Nuclear Genes: Consolidation of Major Clades and Identification of a Novel Position of the Non-photosynthetic Orobanche Clade Sister to All Other Parasitic Orobanchaceae

Frontiers in Plant Science
Xi LiGerald M Schneeweiss

Abstract

Molecular phylogenetic analyses have greatly advanced our understanding of phylogenetic relationships in Orobanchaceae, a model system to study parasitism in angiosperms. As members of this group may lack some genes widely used for phylogenetic analysis and exhibit varying degrees of accelerated base substitution in other genes, relationships among major clades identified previously remain contentious. To improve inferences of phylogenetic relationships in Orobanchaceae, we used two pentatricopeptide repeat (PPR) and three low-copy nuclear (LCN) genes, two of which have been developed for this study. Resolving power and level of support strongly differed among markers. Despite considerable incongruence among newly and previously sequenced markers, monophyly of major clades identified in previous studies was confirmed and, especially in analyses of concatenated data, strongly supported after the exclusion of a small group of East Asian genera (Pterygiella and Phtheirospermum) from the Euphrasia-Rhinanthus clade. The position of the Orobanche clade sister to all other parasitic Orobanchaceae may indicate that the shift to holoparasitism occurred early in the evolution of the family. Although well supported in analyses of concaten...Continue Reading

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Citations

Nov 18, 2020·The New Phytologist·J Musembi MutukuKen Shirasu
Mar 31, 2021·Plant Physiology·Kaori Miyashima FurutaSatoko Yoshida
Aug 12, 2021·Computational and Structural Biotechnology Journal·Ligang MaWeisheng Feng

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Methods Mentioned

BETA
PCR

Software Mentioned

Muscle
PartitionFinder
Mesquite
PAUP
Tracer
PHYA
BLASTN
Primer Premier
MrBayes
SeqMan II

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