The small nuclear genomes of Selaginella are associated with a low rate of genome size evolution

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Serval ID
serval:BIB_8F13063F9F97
Type
Article: article from journal or magazin.
Collection
Publications
Title
The small nuclear genomes of Selaginella are associated with a low rate of genome size evolution
Journal
Genome biology and evolution
Author(s)
Baniaga A.E., Arrigo N., Barker M.S.
ISSN
1759-6653 (Electronic)
ISSN-L
1759-6653
Publication state
Published
Issued date
2016
Peer-reviewed
Oui
Volume
8
Number
5
Pages
1516-1525
Language
english
Abstract
The haploid nuclear genome size (1C DNA) of vascular land plants varies over several orders of magnitude. Much of this observed diversity in genome size is due to the proliferation and deletion of transposable elements. To date, all vascular land plant lineages with extremely small nuclear genomes represent recently derived states, having ancestors with much larger genome sizes. The Selaginellaceae represent an ancient lineage with extremely small genomes. It is unclear how small nuclear genomes evolved in Selaginella We compared the rates of nuclear genome size evolution in Selaginella and major vascular plant clades in a comparative phylogenetic framework. For the analyses, we collected 29 new flow cytometry estimates of haploid genome size in Selaginella to augment publicly available data. Selaginella possess some of the smallest known haploid nuclear genome sizes, as well as the lowest rate of genome size evolution observed across all vascular land plants included in our analyses. Additionally, our analyses provide strong support for a history of haploid nuclear genome size stasis in Selaginella Our results indicate that Selaginella, similar to other early diverging lineages of vascular land plants, has relatively low rates of genome size evolution. Further, our analyses highlight that a rapid transition to a small genome size is only one route to an extremely small genome.
Keywords
evolution, flow cytometry, genome size, lycophytes, Seiaginella, Selaginellaceae
Pubmed
Open Access
Yes
Create date
17/04/2016 18:57
Last modification date
20/08/2019 15:52
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