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

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_8F13063F9F97
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The small nuclear genomes of Selaginella are associated with a low rate of genome size evolution
Périodique
Genome biology and evolution
Auteur(s)
Baniaga A.E., Arrigo N., Barker M.S.
ISSN
1759-6653 (Electronic)
ISSN-L
1759-6653
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
8
Numéro
5
Pages
1516-1525
Langue
anglais
Résumé
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.
Mots-clé
evolution, flow cytometry, genome size, lycophytes, Seiaginella, Selaginellaceae
Pubmed
Open Access
Oui
Création de la notice
17/04/2016 18:57
Dernière modification de la notice
20/08/2019 15:52
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