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Genetic composition of Swiss and Austrian members of the apogamous Dryopteris affinis complex (Dryopteridaceae, Polypodiopsida) based on ISSR markers


Schneller, J; Krattinger, K (2010). Genetic composition of Swiss and Austrian members of the apogamous Dryopteris affinis complex (Dryopteridaceae, Polypodiopsida) based on ISSR markers. Plant Systematics and Evolution, 286(1-2):1-6.

Abstract

We have investigated genetic variability among 56 individuals of the apogamous Dryopteris affinis complex from 9 populations in Switzerland and Austria using inter-simple sequence repeats. Our sample included 6 diploids, 48 triploids, and 1 tetraploid and 1 pentaploid plant each. We found genetic differences between and within the different ploidy levels. All diploids genetically differed from each other. In contrast, among the triploid plants we only found seven different genotypes of which one was rather common. The tetraploid and pentaploid individuals were nested among the diploids and triploids. No hypotheses have yet been proposed to explain the origin of genetic variations such as those documented here. We hope that this study stimulates new ideas about the position and the genetic background of this taxonomically difficult species group, in particular, and of apogamous species complexes in ferns in general.

Abstract

We have investigated genetic variability among 56 individuals of the apogamous Dryopteris affinis complex from 9 populations in Switzerland and Austria using inter-simple sequence repeats. Our sample included 6 diploids, 48 triploids, and 1 tetraploid and 1 pentaploid plant each. We found genetic differences between and within the different ploidy levels. All diploids genetically differed from each other. In contrast, among the triploid plants we only found seven different genotypes of which one was rather common. The tetraploid and pentaploid individuals were nested among the diploids and triploids. No hypotheses have yet been proposed to explain the origin of genetic variations such as those documented here. We hope that this study stimulates new ideas about the position and the genetic background of this taxonomically difficult species group, in particular, and of apogamous species complexes in ferns in general.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Systematic and Evolutionary Botany
Dewey Decimal Classification:580 Plants (Botany)
Language:English
Date:May 2010
Deposited On:08 Jun 2010 18:46
Last Modified:07 Dec 2017 02:36
Publisher:Springer
ISSN:0378-2697
Publisher DOI:https://doi.org/10.1007/s00606-009-0264-7

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