期刊
MOLECULAR PHYLOGENETICS AND EVOLUTION
卷 57, 期 3, 页码 978-991出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2010.08.003
关键词
Silene; Section Elisanthe; Section Melandrium; Chloroplast DNA; ITS; Introgression; Relative dating; Incongruence between nuclear and plastid; phylogenies
资金
- Swedish Research Council (VR)
- Crafoord Foundation
- Stiftelsen Anna och Svante Murbecks minnesfond
- Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS)
- Royal Physiographic Society in Lund
- Helge Ax:son Johnssons stiftelse
- Royal Swedish Academy of Sciences
- Liljewalchs resestipendium
- Linne-stipendiestiftelsen
- Wallenbergstiftelsen
- Microsoft Corporation
The phylogenetic relationships between the five dioecious species in Silene section Melandrium (Caryophyllaceae) and their putative hermaphrodite relatives are investigated based on an extensive geographic and taxonomic sample, using DNA sequence data from the chloroplast genome and the nuclear ribosomal ITS region. The hermaphrodite S. noctiflora (the type species of section Elisanthe) is distantly related to the dioecious species. With the exception of chloroplast sequences in one S. latifolia population from Turkey, the dioecious taxa form a strongly supported monophyletic group (Silene section Melandrium). The phylogenetic structure within section Melandrium differs between chloroplast and nuclear sequences. While there is extensive sharing of chloroplast haplotypes among all the dioecious species (the observed patterns reflect geographic structure), the nuclear ITS phylogeny shows a higher degree of taxonomic structure. Chloroplast-sharing by the section Melandrium species is most plausibly explained by a history of hybridization and extensive backcrossing. (C) 2010 Elsevier Inc. All rights reserved.
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