Oberprieler, Christoph and Konowalik, Kamil and Fackelmann, Andreas and Vogt, Robert (2018) Polyploid speciation across a suture zone: phylogeography and species delimitation in S French Leucanthemum Mill. representatives (Compositae-Anthemideae). PLANT SYSTEMATICS AND EVOLUTION, 304 (9). pp. 1141-1155. ISSN 0378-2697, 2199-6881
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Chromosome counts suggest that the three varieties of the SE French and NW Italian Leucanthemum vulgare subsp. glaucophyllum (var. glaucophyllum: decaploid; var. esterellense: octoploid; var. subglaucum: hexaploid) deserve acknowledgement as independent species. Here we use AFLP fingerprinting and sequence information from two chloroplast regions (psbA-trnH, rpl16) to gain insight into the evolutionary relationships among those species, along with those with the co-occurring and ecologically similar L. pallens (hexaploid) and the closely related L. ircutianum subsp. leucolepis (tetraploid). Both genetic marker systems reveal a geographical differentiation pattern in L. pallens with the Rhone valley forming a suture zone between the western (SW France, Spain) and eastern (SE France, NW Italy) populations, arguing for the existence of two lineages in the species that may have survived the Last Glacial Maximum (LGM) in refugia on the Iberian and Apennine Peninsulas. Transgressions of this suture zone are observable in the case of the hexaploid L. subglaucum from the Massif Central, which shows genetic relationships to the more eastern decaploid L. glaucophyllum from the Alps Maritimes, and the octoploid L. esterellense from the Esterel Massif (Cote d ' Azur), for which relationships to the more western populations of the hexaploids L. pallens and L. subglaucum are observable. The genetic and cytological survey of a mixed stand of L. pallens and L. glaucophyllum on Monte Bignone (Liguria, NW Italy) reveals patterns of recent hybridisation of these two species with intermediate octoploid and nonaploid cytotypes that are, however, genetically distinct from L. esterellense.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUCLEAR-DNA CONTENT; PLURIFLORUM CLAN COMPOSITAE; POPULATION-STRUCTURE; CHLOROPLAST DNA; PHENOTYPIC ASSOCIATIONS; SEQUENCE VARIATION; CLADISTIC-ANALYSIS; FLOW-CYTOMETRY; PLANT; AFLP; AFLP fingerprinting; Asteraceae; cpDNA haplotype network; Flow cytometry; Hybridisation; Polyploidy |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Group Plant Systematics and Evolution (Prof. Dr. Christoph Oberprieler) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Oct 2019 09:11 |
| Last Modified: | 10 Oct 2019 09:11 |
| URI: | https://pred.uni-regensburg.de/id/eprint/13604 |
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