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Link to original content: https://pubmed.ncbi.nlm.nih.gov/33721355
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. 2021 Aug;57(4):1223-1233.
doi: 10.1111/jpy.13168. Epub 2021 May 24.

Phylogenomic analysis restructures the ulvophyceae

Øyvind Saetren Gulbrandsen  1   2 , Ina Jungersen Andresen  1 , Anders Kristian Krabberød  1 , Jon Bråte  1   3 , Kamran Shalchian-Tabrizi  4
Affiliations

Phylogenomic analysis restructures the ulvophyceae

Øyvind Saetren Gulbrandsen et al. J Phycol. 2021 Aug.

Abstract

Here, we present new transcriptome sequencing data from seven species of Dasycladales (Ulvophyceae) and a phylogenomic analysis of the Chlorophyta with a particular focus on Ulvophyceae. We have focused on a broad selection of green algal groups and carefully selected genes suitable for reconstructing deep eukaryote evolutionary histories. Increasing the taxon sampling of Dasycladales restructures the Ulvophyceae by identifying Dasycladales as closely related to Scotinosphaerales and Oltmannsiellopsidales. Contrary to previous studies, we do not find support for a close relationship between Dasycladales and a group with Cladophorales and Trentepohliales. Instead, the latter group is sister to the remainder of the Ulvophyceae. Furthermore, our analyses show high and consistent statistical support for a sister relationship between Bryopsidales and Chlorophyceae in trees generated with both homogeneous and heterogeneous (heterotachy) evolutionary models. Our study provides a new framework for interpreting the evolutionary history of Ulvophyceae and the evolution of cellular morphologies.

Keywords: Acetabularia; Bryopsidales; Chlorophyta; Dasycladales; Scotinosphaerales; Ulvophyceae; cytomorphology; evolution; green algae; phylogeny; transcriptomics.

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