Abstract Detail

Systematics Section/ASPT

Oberprieler, Christoph [1], Greiner, Roland [1], Konowalik, Kamil [1], Talianova, Martina [1], Tomasello, Salvatore [1], Wagner, Florian [1], Vogt, Robert [3].

Consequences of polyploidy: Phylogeny, phyloecology, and expression of duplicated genes in Leucanthemum Mill. (Compositae, Anthemideae).

The genus Leucanthemum Mill. (Compositae, Anthemideae) is a large polyploid complex comprising 42 species with ploidy levels ranging from diploid (2x) to dodecaploid (12x), and one species [L. lacustre (Brot.) Samp.) from Portugal] even showing a chromosome number of 2n = 22x = 198 (docosaploid). The genus is distributed all over the European continent, with one species (L. ircutianum DC.) reaching Siberia and some species introduced to many temperate regions of the northern and southern hemisphere. The present contribution summarises results of different subprojects dealing with the evolutionary history of this polyploid complex and is focussing on (a) the reconstruction of phylogenetic relationships among Leucanthemum taxa using species tree reconstruction methods based on 454 next-generation sequencing of nuclear and chloroplast markers and AFLP fingerprinting, (b) the evolution of eco-climatological niches in this polyploid complex, and (c) the consequences of polyploidisation on copy numbers and expression levels of gene pairs responsible for major functional complexes of photosynthesis being encoded in the nuclear and the plastid genome (i.e., psbA-psbO, rbcL-rbcS).

1 - University of Regensburg, Institute of Botany, Universitätsstr. 31, Regensburg, D-93040, Germany
2 - University of Regensburg, Institute of Botany, Universitätsstr. 31, Regensburg, D-93040, Germany
3 - Freie Universität Berlin, Botanc Garden and Botanical Museum Berlin-Dahlem, Königin-Luise-Str. 6-8, Berlin, D-14191, Germany

Keywords:
polyploidy
Asteraceae
hybridization 
species tree
gene tree
gene expression
phyloecology.

Presentation Type: Oral Paper:Papers for Sections
Session: 34
Location: Evergreen/Grove
Date: Wednesday, July 30th, 2014
Time: 10:30 AM
Number: 34009
Abstract ID:110
Candidate for Awards:Margaret Menzel Award