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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Convergent Acquisition of Nonembryonic Development in Styelid Ascidians

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Alie, Alexandre [1] ; Hiebert, Laurel Sky [2, 3] ; Simion, Paul [4] ; Scelzo, Marta [1] ; Prunster, Maria Mandela [1] ; Lotito, Sonia [1] ; Delsuc, Frederic [4] ; Douzery, Emmanuel J. P. [4] ; Dantec, Christelle [5] ; Lemaire, Patrick [5] ; Darras, Sebastien [6] ; Kawamura, Kazuo [7] ; Brown, Federico D. [2, 3, 8] ; Tiozzo, Stefano [1]
Total Authors: 14
[1] Sorbonne Univ, CNRS, Lab Biol Dev Villefranche Sur Mer LBDV, F-06230 Paris - France
[2] Univ Sao Paulo, Inst Biociencias, Dept Zool, Sao Paulo - Brazil
[3] Univ Sao Paulo, Ctr Biol Marinha CEBIMar, Sao Paulo - Brazil
[4] Univ Montpellier, CNRS, IRD, ISEM, EPHE, Montpellier - France
[5] Univ Montpellier, CNRS, CRBM, Montpellier - France
[6] Sorbonne Univ, CNRS, BIOM, Observ Oceanol, F-06230 Paris - France
[7] Kochi Univ, Fac Sci, Lab Cellular & Mol Biotechnol, Kochi - Japan
[8] Inst Nacl Ciencia & Tecnol Estudos Interdisciplin, Salvador, BA - Brazil
Total Affiliations: 8
Document type: Journal article
Source: Molecular Biology and Evolution; v. 35, n. 7, p. 1728-1743, JUL 2018.
Web of Science Citations: 8

Asexual propagation and whole body regeneration are forms of nonembryonic development (NED) widespread across animal phyla and central in life history and evolutionary diversification of metazoans. Whereas it is challenging to reconstruct the gains or losses of NED at large phylogenetic scale, comparative studies could benefit from being conducted at more restricted taxonomic scale, in groups for which phylogenetic relationships are well established. The ascidian family of Styelidae encompasses strictly sexually reproducing solitary forms as well as colonial species that combine sexual reproduction with different forms of NED. To date, the phylogenetic relationships between colonial and solitary styelids remain controversial and so is the pattern of NED evolution. In this study, we built an original pipeline to combine eight genomes with 18 de novo assembled transcriptomes and constructed data sets of unambiguously orthologous genes. Using a phylogenomic super-matrix of 4,908 genes from these 26 tunicates we provided a robust phylogeny of this family of chordates, which supports two convergent acquisitions of NED. This result prompted us to further describe the budding process in the species Potyandrocarpa zorritensis, leading to the discovery of a novel mechanism of asexual development. Whereas the pipeline and the data sets produced can be used for further phylogenetic reconstructions in tunicates, the phylogeny provided here sets an evolutionary framework for future experimental studies on the emergence and disappearance of complex characters such as asexual propagation and whole body regeneration. (AU)

FAPESP's process: 15/14052-8 - Origins of coloniality: Developmental mechanisms and directionality of colonial coalescence in ascidians
Grantee:Laurel Sky Hiebert
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/50164-5 - Stem cells, regeneration, and the evolution of coloniality in ascidians
Grantee:Federico David Brown Almeida
Support type: Research Grants - Young Investigators Grants