The phylogenetic branching order of the green algal groups that gave rise to land plants remains uncertain despite its fundamental importance to understanding plant evolution. Previous studies have demonstrated that land plants evolved from streptophyte algae, but different lineages of streptophytes have been suggested to be the sister group of land plants. To better understand the evolutionary history of land plants and to determine the potential effects of "long-branch attraction" in phylogenetic reconstruction, we analyzed a chloroplast genome data set including three new chloroplast genomes from streptophyte algae: Coleochaetae orbicularis (Coleochaetales), Nitella hookeri (Charales), and Spirogyra communis (Zygnematales). We further applied a site pattern sorting method together with site- and time-heterogeneous models to investigate the branching order among streptophytes and land plants. Our chloroplast phylogenomic analyses support previous hypotheses based on nuclear data in placing Zygnematales alone, or a clade consisting of Coleochaetales plus Zygnematales, as the closest living relatives of land plants.

Zhong, B.; Xi, Z.; Goremykin, V.; Fong, R.; Mclenachan, P.A.; Novis, P.M.; Davis, C.C.; Penny, D. (2014). Streptophyte algae and the origin of land plants revisited using heterogeneous models with three new algal chloroplast genomes. MOLECULAR BIOLOGY AND EVOLUTION, 31 (1): 177-183. doi: 10.1093/molbev/mst200 handle: http://hdl.handle.net/10449/26701

Streptophyte algae and the origin of land plants revisited using heterogeneous models with three new algal chloroplast genomes

Goremykin, Vadim;
2014-01-01

Abstract

The phylogenetic branching order of the green algal groups that gave rise to land plants remains uncertain despite its fundamental importance to understanding plant evolution. Previous studies have demonstrated that land plants evolved from streptophyte algae, but different lineages of streptophytes have been suggested to be the sister group of land plants. To better understand the evolutionary history of land plants and to determine the potential effects of "long-branch attraction" in phylogenetic reconstruction, we analyzed a chloroplast genome data set including three new chloroplast genomes from streptophyte algae: Coleochaetae orbicularis (Coleochaetales), Nitella hookeri (Charales), and Spirogyra communis (Zygnematales). We further applied a site pattern sorting method together with site- and time-heterogeneous models to investigate the branching order among streptophytes and land plants. Our chloroplast phylogenomic analyses support previous hypotheses based on nuclear data in placing Zygnematales alone, or a clade consisting of Coleochaetales plus Zygnematales, as the closest living relatives of land plants.
Phylogenomics
Chloroplast genomes
Land plants
Streptophyte algae
Heterogeneous models
Settore AGR/07 - GENETICA AGRARIA
2014
Zhong, B.; Xi, Z.; Goremykin, V.; Fong, R.; Mclenachan, P.A.; Novis, P.M.; Davis, C.C.; Penny, D. (2014). Streptophyte algae and the origin of land plants revisited using heterogeneous models with three new algal chloroplast genomes. MOLECULAR BIOLOGY AND EVOLUTION, 31 (1): 177-183. doi: 10.1093/molbev/mst200 handle: http://hdl.handle.net/10449/26701
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/26701
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