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Phylogenomics provides insights into the evolution of cactophily and host plant shifts in Drosophila

View ORCID ProfileNicolás Nahuel Moreyra, Francisca Cunha Almeida, Carson Allan, Nicolás Frankel, View ORCID ProfileLuciano Matías Matzkin, Esteban Hasson
doi: https://doi.org/10.1101/2022.04.29.490106
Nicolás Nahuel Moreyra
1Departamento de Ecología, Genética y Evolución (EGE), Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
2Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
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  • ORCID record for Nicolás Nahuel Moreyra
  • For correspondence: nmoreyra@ege.fcen.uba.ar ehasson@ege.fcen.uba.ar
Francisca Cunha Almeida
1Departamento de Ecología, Genética y Evolución (EGE), Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
2Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
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Carson Allan
3Department of Entomology, University of Arizona, Tucson, AZ, USA
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Nicolás Frankel
1Departamento de Ecología, Genética y Evolución (EGE), Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
2Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
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Luciano Matías Matzkin
3Department of Entomology, University of Arizona, Tucson, AZ, USA
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Esteban Hasson
1Departamento de Ecología, Genética y Evolución (EGE), Facultad de Ciencias Exactas y Naturales (FCEyN), Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina
2Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
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  • For correspondence: nmoreyra@ege.fcen.uba.ar ehasson@ege.fcen.uba.ar
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Abstract

Cactophilic species of the Drosophila buzzatii cluster (repleta group) comprise an excellent model group to investigate genomic changes underlying adaptation to extreme climate conditions and host plants. In particular, these species offer a subject to study the transition from chemically simpler breeding sites (like prickly pears of the genus Opuntia) to chemically more complex hosts (columnar cacti). Here, we report four highly contiguous genome assemblies of three species of the buzzatii cluster. Based on this genomic data and inferred phylogenetic relationships, we identified candidate taxonomically restricted genes (TRGs) likely involved in the evolution of cactophily and cactus host specialization in internal branches of the subgenus Drosophila. Functional enrichment analyses of TRGs within the buzzatii cluster identified genes involved in detoxification, water preservation, immune system response, anatomical structure development, and morphogenesis. In contrast, processes that regulate responses to stress, as well as the metabolism of nitrogen compounds, transport, and secretion were found in the set of species that are columnar cacti dwellers. These findings are in line with the hypothesis that those genomic innovations brought about instrumental mechanisms underlying adaptation in a group of species that speciated in the arid regions of South America.

Competing Interest Statement

The authors have declared no competing interest.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted May 01, 2022.
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Phylogenomics provides insights into the evolution of cactophily and host plant shifts in Drosophila
Nicolás Nahuel Moreyra, Francisca Cunha Almeida, Carson Allan, Nicolás Frankel, Luciano Matías Matzkin, Esteban Hasson
bioRxiv 2022.04.29.490106; doi: https://doi.org/10.1101/2022.04.29.490106
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Phylogenomics provides insights into the evolution of cactophily and host plant shifts in Drosophila
Nicolás Nahuel Moreyra, Francisca Cunha Almeida, Carson Allan, Nicolás Frankel, Luciano Matías Matzkin, Esteban Hasson
bioRxiv 2022.04.29.490106; doi: https://doi.org/10.1101/2022.04.29.490106

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