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Issue: Vol. 450 No. 3: 30 June 2020
Type: Article
Published: 2020-06-30
DOI: 10.11646/phytotaxa.450.3.1
Page range: 246–256
Abstract views: 26
PDF downloaded: 2

Allium schisticola, a new species with peculiar morphological characters and an unexpected phylogenetic position

Plant Bank, Iranian Biological Resource Center (IBRC), Research Complex of ACECR (Iranian Academic Center for Education, Culture & Research), Karaj, Iran.
FUMH herbarium, Department of Botany, Research Center for Plant Sciences, Ferdowsi University of Mashhad, P.O. Box 91779-48974, Mashhad, Iran.
FUMH herbarium, Department of Botany, Research Center for Plant Sciences, Ferdowsi University of Mashhad, P.O. Box 91779-48974, Mashhad, Iran.
Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Corrensstrasse 3, D-06466 Seeland OT Gatersleben, Germany.
Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Corrensstrasse 3, D-06466 Seeland OT Gatersleben, Germany.
Allium sabalense Allium sahandicum Iran phylogeny section Acanthoprason subg. Melanocrommyum Monocots

Abstract

Allium schisticola is described from West Azarbaijan (Iran) as a new species. It is closely related to A. sabalense and A. sahandicum in having a similar flower color but differs by leaf, filament, and tepal characters. We investigated the phylogenetic relationship of the new species based on sequences of the chloroplast trnL-trnF and nuclear ribosomal DNA internal transcribed spacer (ITS) regions in A. subg. Melanocrommyum compared with 109 accessions of this subgenus. Our results confirm its placement in A. subg. Melanocrommyum. However, the ITS tree showed that the new species should belong to A. sect. Melanocrommyum despite the fact that it represents many morphological characters of A. sect. Acanthoprason. Most peculiar for the new species are obtuse tepals broadest near the tip (vs. very narrowly lanceolate up to triangular tepals in A. sect. Acanthoprason), with adaxially inconspicuous median vein (vs. conspicuous median vein in sect. Acanthoprason). The new species is diploid with a chromosome number of 2n = 2x = 16. Karyotype features and meiotic chromosomes behavior are presented for the new taxon. A detailed morphological description, illustrations, and a distribution map of the new species are given.