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Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead

PREMISE: Significant paleobotanical discoveries in recent decades have considerably improved our understanding of the early evolution of angiosperms and their flowers. However, our ability to test the systematic placement of fossil flowers on the basis of phylogenetic analyses has remained limited,...

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Autores principales: Schönenberger, Jürg, von Balthazar, Maria, López Martínez, Andrea, Albert, Béatrice, Prieu, Charlotte, Magallón, Susana, Sauquet, Hervé
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7702048/
https://www.ncbi.nlm.nih.gov/pubmed/33026116
http://dx.doi.org/10.1002/ajb2.1538
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author Schönenberger, Jürg
von Balthazar, Maria
López Martínez, Andrea
Albert, Béatrice
Prieu, Charlotte
Magallón, Susana
Sauquet, Hervé
author_facet Schönenberger, Jürg
von Balthazar, Maria
López Martínez, Andrea
Albert, Béatrice
Prieu, Charlotte
Magallón, Susana
Sauquet, Hervé
author_sort Schönenberger, Jürg
collection PubMed
description PREMISE: Significant paleobotanical discoveries in recent decades have considerably improved our understanding of the early evolution of angiosperms and their flowers. However, our ability to test the systematic placement of fossil flowers on the basis of phylogenetic analyses has remained limited, mainly due to the lack of an adequate, angiosperm‐wide morphological data set for extant taxa. Earlier attempts to place fossil flowers phylogenetically were, therefore, forced to make prior qualitative assessments of the potential systematic position of fossils and to restrict phylogenetic analyses to selected angiosperm subgroups. METHODS: We conduct angiosperm‐wide molecular backbone analyses of 10 fossil flower taxa selected from the Cretaceous record. Our analyses make use of a floral trait data set built within the framework of the eFLOWER initiative. We provide an updated version of this data set containing data for 28 floral and two pollen traits for 792 extant species representing 372 angiosperm families. RESULTS: We find that some fossils are placed congruently with earlier hypotheses while others are found in positions that had not been suggested previously. A few take up equivocal positions, including the stem branches of large clades. CONCLUSIONS: Our study provides an objective approach to test for the phylogenetic position of fossil flowers across angiosperms. Such analyses may provide a complementary tool for paleobotanical studies, allowing for a more comprehensive understanding of fossil phylogenetic relationships in angiosperms. Ongoing work focused on extending the sampling of extant taxa and the number of floral traits will further improve the applicability and accuracy of our approach.
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spelling pubmed-77020482020-12-14 Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead Schönenberger, Jürg von Balthazar, Maria López Martínez, Andrea Albert, Béatrice Prieu, Charlotte Magallón, Susana Sauquet, Hervé Am J Bot Research Articles PREMISE: Significant paleobotanical discoveries in recent decades have considerably improved our understanding of the early evolution of angiosperms and their flowers. However, our ability to test the systematic placement of fossil flowers on the basis of phylogenetic analyses has remained limited, mainly due to the lack of an adequate, angiosperm‐wide morphological data set for extant taxa. Earlier attempts to place fossil flowers phylogenetically were, therefore, forced to make prior qualitative assessments of the potential systematic position of fossils and to restrict phylogenetic analyses to selected angiosperm subgroups. METHODS: We conduct angiosperm‐wide molecular backbone analyses of 10 fossil flower taxa selected from the Cretaceous record. Our analyses make use of a floral trait data set built within the framework of the eFLOWER initiative. We provide an updated version of this data set containing data for 28 floral and two pollen traits for 792 extant species representing 372 angiosperm families. RESULTS: We find that some fossils are placed congruently with earlier hypotheses while others are found in positions that had not been suggested previously. A few take up equivocal positions, including the stem branches of large clades. CONCLUSIONS: Our study provides an objective approach to test for the phylogenetic position of fossil flowers across angiosperms. Such analyses may provide a complementary tool for paleobotanical studies, allowing for a more comprehensive understanding of fossil phylogenetic relationships in angiosperms. Ongoing work focused on extending the sampling of extant taxa and the number of floral traits will further improve the applicability and accuracy of our approach. John Wiley and Sons Inc. 2020-10-07 2020-10 /pmc/articles/PMC7702048/ /pubmed/33026116 http://dx.doi.org/10.1002/ajb2.1538 Text en © 2020 The Authors. American Journal of Botany published by Wiley Periodicals LLC on behalf of Botanical Society of America This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Articles
Schönenberger, Jürg
von Balthazar, Maria
López Martínez, Andrea
Albert, Béatrice
Prieu, Charlotte
Magallón, Susana
Sauquet, Hervé
Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
title Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
title_full Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
title_fullStr Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
title_full_unstemmed Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
title_short Phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
title_sort phylogenetic analysis of fossil flowers using an angiosperm‐wide data set: proof‐of‐concept and challenges ahead
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7702048/
https://www.ncbi.nlm.nih.gov/pubmed/33026116
http://dx.doi.org/10.1002/ajb2.1538
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