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Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri

Along the green lineage (Chlorophyta and Streptophyta), mitochondria and chloroplast are mainly uniparentally transmitted and their evolution is thus clonal. The mode of organellar inheritance in their ancestor is less certain. The inability to make clear phylogenetic inference is partly due to a la...

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Autores principales: Blanc-Mathieu, Romain, Sanchez-Ferandin, Sophie, Eyre-Walker, Adam, Piganeau, Gwenael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3762196/
https://www.ncbi.nlm.nih.gov/pubmed/23873918
http://dx.doi.org/10.1093/gbe/evt106
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author Blanc-Mathieu, Romain
Sanchez-Ferandin, Sophie
Eyre-Walker, Adam
Piganeau, Gwenael
author_facet Blanc-Mathieu, Romain
Sanchez-Ferandin, Sophie
Eyre-Walker, Adam
Piganeau, Gwenael
author_sort Blanc-Mathieu, Romain
collection PubMed
description Along the green lineage (Chlorophyta and Streptophyta), mitochondria and chloroplast are mainly uniparentally transmitted and their evolution is thus clonal. The mode of organellar inheritance in their ancestor is less certain. The inability to make clear phylogenetic inference is partly due to a lack of information for deep branching organisms in this lineage. Here, we investigate organellar evolution in the early branching green alga Ostreococcus tauri using population genomics data from the complete mitochondrial and chloroplast genomes. The haplotype structure is consistent with clonal evolution in mitochondria, while we find evidence for recombination in the chloroplast genome. The number of recombination events in the genealogy of the chloroplast suggests that recombination, and thus biparental inheritance, is not rare. Consistent with the evidence of recombination, we find that the ratio of the number of nonsynonymous to the synonymous polymorphisms per site is lower in chloroplast than in the mitochondria genome. We also find evidence for the segregation of two selfish genetic elements in the chloroplast. These results shed light on the role of recombination and the evolutionary history of organellar inheritance in the green lineage.
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spelling pubmed-37621962013-09-04 Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri Blanc-Mathieu, Romain Sanchez-Ferandin, Sophie Eyre-Walker, Adam Piganeau, Gwenael Genome Biol Evol Research Article Along the green lineage (Chlorophyta and Streptophyta), mitochondria and chloroplast are mainly uniparentally transmitted and their evolution is thus clonal. The mode of organellar inheritance in their ancestor is less certain. The inability to make clear phylogenetic inference is partly due to a lack of information for deep branching organisms in this lineage. Here, we investigate organellar evolution in the early branching green alga Ostreococcus tauri using population genomics data from the complete mitochondrial and chloroplast genomes. The haplotype structure is consistent with clonal evolution in mitochondria, while we find evidence for recombination in the chloroplast genome. The number of recombination events in the genealogy of the chloroplast suggests that recombination, and thus biparental inheritance, is not rare. Consistent with the evidence of recombination, we find that the ratio of the number of nonsynonymous to the synonymous polymorphisms per site is lower in chloroplast than in the mitochondria genome. We also find evidence for the segregation of two selfish genetic elements in the chloroplast. These results shed light on the role of recombination and the evolutionary history of organellar inheritance in the green lineage. Oxford University Press 2013 2013-07-19 /pmc/articles/PMC3762196/ /pubmed/23873918 http://dx.doi.org/10.1093/gbe/evt106 Text en © The Author(s) 2013. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Research Article
Blanc-Mathieu, Romain
Sanchez-Ferandin, Sophie
Eyre-Walker, Adam
Piganeau, Gwenael
Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri
title Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri
title_full Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri
title_fullStr Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri
title_full_unstemmed Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri
title_short Organellar Inheritance in the Green Lineage: Insights from Ostreococcus tauri
title_sort organellar inheritance in the green lineage: insights from ostreococcus tauri
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3762196/
https://www.ncbi.nlm.nih.gov/pubmed/23873918
http://dx.doi.org/10.1093/gbe/evt106
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