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Plastome phylogeny and early diversification of Brassicaceae

Guo, Xinyi ; Liu, Jianquan ; Hao, Guoqian ; Zhang, Lei ; Mao, Kangshan ; Wang, Xiaojuan ; Zhang, Dan ; Ma, Tao ; Hu, Quanjun ; Al-Shehbaz, Ihsan A. ; Koch, Marcus A.

In: BMC Genomics, 18 (2017), Nr. 176. pp. 1-9. ISSN 1471-2164

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Download (1MB) | Lizenz: Creative Commons LizenzvertragPlastome phylogeny and early diversification of Brassicaceae by Guo, Xinyi ; Liu, Jianquan ; Hao, Guoqian ; Zhang, Lei ; Mao, Kangshan ; Wang, Xiaojuan ; Zhang, Dan ; Ma, Tao ; Hu, Quanjun ; Al-Shehbaz, Ihsan A. ; Koch, Marcus A. underlies the terms of Creative Commons Attribution 3.0 Germany

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Abstract

Background: The family Brassicaceae encompasses diverse species, many of which have high scientific and economic importance. Early diversifications and phylogenetic relationships between major lineages or clades remain unclear. Here we re-investigate Brassicaceae phylogeny with complete plastomes from 51 species representing all four lineages or 5 of 6 major clades (A, B, C, E and F) as identified in earlier studies. Results: Bayesian and maximum likelihood phylogenetic analyses using a partitioned supermatrix of 77 protein coding genes resulted in nearly identical tree topologies exemplified by highly supported relationships between clades. All four lineages were well identified and interrelationships between them were resolved. The previously defined Clade C was found to be paraphyletic (the genus Megadenia formed a separate lineage), while the remaining clades were monophyletic. Clade E (lineage III) was sister to clades B + C rather than to all core Brassicaceae (clades A + B + C or lineages I + II), as suggested by a previous transcriptome study. Molecular dating based on plastome phylogeny supported the origin of major lineages or clades between late Oligocene and early Miocene, and the following radiative diversification across the family took place within a short timescale. In addition, gene losses in the plastomes occurred multiple times during the evolutionary diversification of the family. Conclusions: Plastome phylogeny illustrates the early diversification of cruciferous species. This phylogeny will facilitate our further understanding of evolution and adaptation of numerous species in the model family Brassicaceae.

Item Type: Article
Journal or Publication Title: BMC Genomics
Volume: 18
Number: 176
Publisher: BioMed Central; Springer
Place of Publication: London; Berlin; Heidelberg
Date Deposited: 22 Feb 2017 08:26
Date: 2017
ISSN: 1471-2164
Page Range: pp. 1-9
Faculties / Institutes: Service facilities > Centre for Organismal Studies Heidelberg (COS)
Subjects: 570 Life sciences
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