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Tytuł pozycji:

Polyploidy in gymnosperms - Insights into the genomic and evolutionary consequences of polyploidy in Ephedra.

Tytuł :
Polyploidy in gymnosperms - Insights into the genomic and evolutionary consequences of polyploidy in Ephedra.
Autorzy :
Ickert-Bond SM; Department of Biology and Wildlife & UA Museum of the North, University of Alaska Fairbanks (UAF), Fairbanks, AK, USA. Electronic address: .
Sousa A; Systematic Botany and Mycology, Department of Biology, University of Munich (LMU), Munich, Germany.
Min Y; Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Ave., Cambridge, MA, USA.
Loera I; Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Ave., Cambridge, MA, USA.
Metzgar J; Department of Biological Sciences, Virginia Polytechnic Institute and State University, 926 West Campus Drive, Blacksburg, VA, USA.
Pellicer J; Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom; Institut Botànic de Barcelona (IBB, CSIC-Ajuntament de Barcelona), Passeig del Migdia sn, 08038 Barcelona, Spain.
Hidalgo O; Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom; Laboratori de Botànica - Unitat associada CSIC, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028 Barcelona, Catalonia, Spain.
Leitch IJ; Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, United Kingdom.
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Źródło :
Molecular phylogenetics and evolution [Mol Phylogenet Evol] 2020 Jun; Vol. 147, pp. 106786. Date of Electronic Publication: 2020 Mar 02.
Typ publikacji :
Journal Article; Research Support, Non-U.S. Gov't
Język :
English
Imprint Name(s) :
Publication: San Diego, CA ; Orlando, FL : Academic Press
Original Publication: San Diego : Academic Press, c1992-
MeSH Terms :
Biological Evolution*
Genomics*
Polyploidy*
Ephedra/*genetics
Evolution, Molecular ; Genetic Variation ; Genome Size ; Genome, Plant ; Phylogeny ; Time Factors ; Tracheophyta/genetics
Contributed Indexing :
Keywords: C-value*; Chromosomes*; Ephedra*; Genome size*; Gymnosperm*; Polyploidy*
Entry Date(s) :
Date Created: 20200306 Date Completed: 20200923 Latest Revision: 20200923
Update Code :
20201023
DOI :
10.1016/j.ympev.2020.106786
PMID :
32135310
Czasopismo naukowe
While polyploidization is recognized as a major evolutionary driver for ferns and angiosperms, little is known about its impact in gymnosperms, where polyploidy is much less frequent. We explore Ephedra to evaluate (i) the extent of genome size diversity in the genus and the influence polyploidy has had on the evolution of nuclear DNA contents, and (ii) identify where shifts in genome size and polyploidy have occurred both temporally and spatially. A phylogenetic framework of all Ephedra species together with genome sizes and karyotypes for 87% and 67% of them respectively, were used to explore ploidy evolution and its global distribution patterns. Polyploidy was shown to be extremely common, with 41 species (83%) being polyploid (up to 8×) or having polyploid cytotypes - the highest frequency and level reported for any gymnosperm. Genome size was also diverse, with values ranging ~5-fold (8.09-38.34 pg/1C) - the largest range for any gymnosperm family - and increasing in proportion to ploidy level (i.e. no genome downsizing). Our findings provide novel data which support the view that gymnosperms have a more conserved mode of genomic evolution compared with angiosperms.
(Copyright © 2020 Elsevier Inc. All rights reserved.)

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