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Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species

C(4) photosynthesis evolved multiple times independently in angiosperms, but most origins are relatively old so that the early events linked to photosynthetic diversification are blurred. The grass Alloteropsis semialata is an exception, as this species encompasses C(4) and non-C(4) populations. Usi...

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Autores principales: Bianconi, Matheus E., Dunning, Luke T., Curran, Emma V., Hidalgo, Oriane, Powell, Robyn F., Mian, Sahr, Leitch, Ilia J., Lundgren, Marjorie R., Manzi, Sophie, Vorontsova, Maria S., Besnard, Guillaume, Osborne, Colin P., Olofsson, Jill K., Christin, Pascal-Antoine
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7735283/
https://www.ncbi.nlm.nih.gov/pubmed/33171085
http://dx.doi.org/10.1098/rspb.2020.1960
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author Bianconi, Matheus E.
Dunning, Luke T.
Curran, Emma V.
Hidalgo, Oriane
Powell, Robyn F.
Mian, Sahr
Leitch, Ilia J.
Lundgren, Marjorie R.
Manzi, Sophie
Vorontsova, Maria S.
Besnard, Guillaume
Osborne, Colin P.
Olofsson, Jill K.
Christin, Pascal-Antoine
author_facet Bianconi, Matheus E.
Dunning, Luke T.
Curran, Emma V.
Hidalgo, Oriane
Powell, Robyn F.
Mian, Sahr
Leitch, Ilia J.
Lundgren, Marjorie R.
Manzi, Sophie
Vorontsova, Maria S.
Besnard, Guillaume
Osborne, Colin P.
Olofsson, Jill K.
Christin, Pascal-Antoine
author_sort Bianconi, Matheus E.
collection PubMed
description C(4) photosynthesis evolved multiple times independently in angiosperms, but most origins are relatively old so that the early events linked to photosynthetic diversification are blurred. The grass Alloteropsis semialata is an exception, as this species encompasses C(4) and non-C(4) populations. Using phylogenomics and population genomics, we infer the history of dispersal and secondary gene flow before, during and after photosynthetic divergence in A. semialata. We further analyse the genome composition of individuals with varied ploidy levels to establish the origins of polyploids in this species. Detailed organelle phylogenies indicate limited seed dispersal within the mountainous region of origin and the emergence of a C(4) lineage after dispersal to warmer areas of lower elevation. Nuclear genome analyses highlight repeated secondary gene flow. In particular, the nuclear genome associated with the C(4) phenotype was swept into a distantly related maternal lineage probably via unidirectional pollen flow. Multiple intraspecific allopolyploidy events mediated additional secondary genetic exchanges between photosynthetic types. Overall, our results show that limited dispersal and isolation allowed lineage divergence, with photosynthetic innovation happening after migration to new environments, and pollen-mediated gene flow led to the rapid spread of the derived C(4) physiology away from its region of origin.
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spelling pubmed-77352832020-12-28 Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species Bianconi, Matheus E. Dunning, Luke T. Curran, Emma V. Hidalgo, Oriane Powell, Robyn F. Mian, Sahr Leitch, Ilia J. Lundgren, Marjorie R. Manzi, Sophie Vorontsova, Maria S. Besnard, Guillaume Osborne, Colin P. Olofsson, Jill K. Christin, Pascal-Antoine Proc Biol Sci Evolution C(4) photosynthesis evolved multiple times independently in angiosperms, but most origins are relatively old so that the early events linked to photosynthetic diversification are blurred. The grass Alloteropsis semialata is an exception, as this species encompasses C(4) and non-C(4) populations. Using phylogenomics and population genomics, we infer the history of dispersal and secondary gene flow before, during and after photosynthetic divergence in A. semialata. We further analyse the genome composition of individuals with varied ploidy levels to establish the origins of polyploids in this species. Detailed organelle phylogenies indicate limited seed dispersal within the mountainous region of origin and the emergence of a C(4) lineage after dispersal to warmer areas of lower elevation. Nuclear genome analyses highlight repeated secondary gene flow. In particular, the nuclear genome associated with the C(4) phenotype was swept into a distantly related maternal lineage probably via unidirectional pollen flow. Multiple intraspecific allopolyploidy events mediated additional secondary genetic exchanges between photosynthetic types. Overall, our results show that limited dispersal and isolation allowed lineage divergence, with photosynthetic innovation happening after migration to new environments, and pollen-mediated gene flow led to the rapid spread of the derived C(4) physiology away from its region of origin. The Royal Society 2020-11-11 2020-11-11 /pmc/articles/PMC7735283/ /pubmed/33171085 http://dx.doi.org/10.1098/rspb.2020.1960 Text en © 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Evolution
Bianconi, Matheus E.
Dunning, Luke T.
Curran, Emma V.
Hidalgo, Oriane
Powell, Robyn F.
Mian, Sahr
Leitch, Ilia J.
Lundgren, Marjorie R.
Manzi, Sophie
Vorontsova, Maria S.
Besnard, Guillaume
Osborne, Colin P.
Olofsson, Jill K.
Christin, Pascal-Antoine
Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
title Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
title_full Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
title_fullStr Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
title_full_unstemmed Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
title_short Contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
title_sort contrasted histories of organelle and nuclear genomes underlying physiological diversification in a grass species
topic Evolution
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7735283/
https://www.ncbi.nlm.nih.gov/pubmed/33171085
http://dx.doi.org/10.1098/rspb.2020.1960
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