Taxonomy and phylogenetics ofAlliumsectionDecipientia(Amaryllidaceae): morphological characters do not reflect the evolutionary history revealed by molecular markers
- 5 April 2021
- journal article
- research article
- Published by Oxford University Press (OUP) in Botanical Journal of the Linnean Society
- Vol. 197 (2), 190-228
- https://doi.org/10.1093/botlinnean/boab023
Abstract
Phylogenetic and phylogeographic patterns in Allium section Decipientia (subgenus Melanocrommyum) were analysed, including most species of this section and representative species of most other sections of the monophyletic Allium subgenus Melanocrommyum. We constructed a molecular phylogenetic tree based on predominantly non-coding sequences from nuclear ribosomal RNA and four plastid regions. In Allium section Decipientia, 2n = 16 and 2n = 20 chromosomes were confirmed and, in part, newly reported. All plants with 2n = 20 form a clade that is sister to the European A. decipiens and A. quercetorum with 2n = 16 in the ITS analysis and are genetically distant from the Eurasian steppe species with 16 chromosomes, A. tulipifolium and A. robustum. The plastid analysis does not reveal a clear relationship between these three monophyletic groups. The karyotype of A. tulipifolium is similar to those of other members of subgenus Melanocrommyum, but only preliminary chromosomal dimensions could be presented for the species with 2n = 20 chromosomes. The latter group comprises A. grande, A. subscabrum, A. viridulum and the newly described taxa A. koksuense and A. lepsicum. Allium tulipifolium and A. robustum have been placed in a new section Tulipifolia, and all species with 2n = 20 have been placed in a new subsection, Viceniprason, of section Decipientia. A nomenclatorial conspectus and a key for determination of the members of Allium sections Decipientia and Tulipifolia are also provided. According to the time divergence estimation, subgenus Melanocrommyum diversified c. 25 Mya in the late Oligocene. The split between most species of the section Decipientia and other taxa in this subgenus was estimated as early Miocene, which furthermore diversified into two sister clades in mid Miocene. Allium decipiens split off from the ancestors of the 2n = 20 species also in the mid Miocene. Further branching in this species group is of rather young age, and occurred within the last 6 Myr (late Miocene to late Pliocene and Pleistocene).Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (FR 1431/8-1)
- Russian Science Foundation (RSF 19-14-00071)
- Moscow University (АААА-А16-116021660039-1)
This publication has 50 references indexed in Scilit:
- Phylogeny and biogeography of Allium (Amaryllidaceae: Allieae) based on nuclear ribosomal internal transcribed spacer and chloroplast rps16 sequences, focusing on the inclusion of species endemic to ChinaAnnals of Botany, 2010
- Phylogenetic analysis of Allium subg. Melanocrommyum infers cryptic species and demands a new sectional classificationMolecular Phylogenetics and Evolution, 2008
- Phylogenetic relationships of wild and cultivated species of Allium section Cepa inferred by nuclear rDNA ITS sequence analysisÖsterreichische botanische Zeitschrift, 2007
- Application of Phylogenetic Networks in Evolutionary StudiesMolecular Biology and Evolution, 2005
- Molecular signals for Late Tertiary/Early Quaternary range splits of an Eurasian steppe plant: Clausia aprica (Brassicaceae)Molecular Ecology, 2004
- Uniform karyotypes in different sections of Allium L. subgen. Melanocrommyum (WEBB & BERTH.) ROUY from Central AsiaFeddes Repertorium, 1998
- Chloroplastrps16 intron phylogeny of the tribeSileneae (Caryophyllaceae)Österreichische botanische Zeitschrift, 1997
- Universal primers for amplification of three non-coding regions of chloroplast DNAPlant Molecular Biology, 1991
- Confidence Limits on Phylogenies: An Approach Using the BootstrapEvolution, 1985
- NOMENCLATURE FOR CENTROMERIC POSITION ON CHROMOSOMESHereditas, 1964