Oberprieler, Christoph and Barth, Alexander and Schwarz, Stefan and Heilmann, Joerg (2010) Morphological and phytochemical variation, genetic structure and phenology in an introgressive hybrid swarm of Senecio hercynicus and S. ovatus (Compositae, Senecioneae). PLANT SYSTEMATICS AND EVOLUTION, 286 (3-4). pp. 153-166. ISSN 0378-2697,
Full text not available from this repository. (Request a copy)Abstract
Introgressive hybridisation between Senecio hercynicus and Senecio ovatus (Compositae, Senecioneae) was studied in a mixed stand of the two species on the S- and SW-facing slopes of the German part of the Bohemian Forest (SE Germany). Morphological variation based on multivariate analysis of 14 diagnostic characters, along with genetic data from an amplified fragment length polymorphism (AFLP) fingerprinting analysis, indicates that the surveyed stand forms an intensively introgressed hybrid swarm. The majority of individuals were found to be intermediate between the two parental taxa, and strong statistical correlation between phenetic and genetic distances was observed. In contrast to that, flowering time of individuals (expressed as the time when 50% of the capitula of a plant were in flower) was found to follow a bimodal distribution in the hybrid swarm and lacked any correlation with the genetic and morphological relationships among plants. The same was true for the spectra of pyrrolizidine alkaloids (PA) revealed by a gas-chromatographic survey: most of the 142 individuals surveyed fell into one of two main chemotypes, only a few plants exhibited an intermediate and additive PA spectrum, and no correlation with the genetic and morphological relationships among plants was observed. Assuming that most of the AFLP markers are neutral, we conclude that the correlation of morphology with the genetic pattern may argue for the neutrality of morphological features analysed. Consequently, we interpret the lack of correlation between phenological and phytochemical data with the neutral genetic markers as evidence that both phenology and phytochemistry may be either under selection or that these features are genetically or biosynthetically constrained.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NEMORENSIS GROUP COMPOSITAE; SOUTHERN ARABIAN PENINSULA; ADJACENT PLANT-POPULATIONS; MULTILOCUS GENOTYPE DATA; PYRROLIZIDINE ALKALOIDS; FLOWERING PHENOLOGY; CLIMATE-CHANGE; EVOLUTION; JACOBAEA; ZONES; Amplified fragment length polymorphism; Asteraceae; Chemical defence; Flowering time; Herbivory; Hybridisation; Pyrrolizidine alkaloids; Senecio |
| Subjects: | 500 Science > 580 Botanical sciences 600 Technology > 615 Pharmacy |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Group Plant Systematics and Evolution (Prof. Dr. Christoph Oberprieler) Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical Biology (Prof. Heilmann) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jul 2020 12:45 |
| Last Modified: | 29 Jul 2020 12:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/24676 |
Actions (login required)
 |
View Item |
