Taxonomic scheme of the order Chaetophorales (Chlorophyceae, Chlorophyta) based on chloroplast genomes
| Autor: | Huan Zhu, Benwen Liu, Zheng Yu Hu, Yu Xin Hu, Guoxiang Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Nuclear gene Chloroplasts lcsh:QH426-470 lcsh:Biotechnology Aphanochaetaceae Gene order rearrangement Germination Chaetophoraceae 010603 evolutionary biology 01 natural sciences DNA Ribosomal Synteny Evolution Molecular 03 medical and health sciences Chlorophyceae Chlorophyta lcsh:TP248.13-248.65 Oedogoniales Genetics Green algae Genome Chloroplast Phylogeny 030304 developmental biology Chaetopeltidales 0303 health sciences Chaetophorales biology Phylogenetic tree Genomics Sequence Analysis DNA biology.organism_classification Classification Nuclear genes lcsh:Genetics Schizomeridaceae Evolutionary biology Biotechnology Research Article |
| Zdroj: | BMC Genomics, Vol 21, Iss 1, Pp 1-12 (2020) BMC Genomics |
| ISSN: | 1471-2164 |
| DOI: | 10.1186/s12864-020-06845-y |
| Popis: | Background: Order Chaetophorales currently includes six families, namely Schizomeridaceae, Aphanochaetaceae, Barrancaceae, Uronemataceae, Fritschiellaceae, and Chaetophoraceae. The phylogenetic relationships of Chaetophorales have been inferred primarily through phylogenetic analysis based on rDNA sequences. Most studies have primarily focused on intergeneric phylogenetic relationships within this order and the phylogenetic relationships with four other Chlorophycean orders (Chaetophorales, Chaetopeltidales and Oedogoniales, and Volvocales). The phylogenetic relationships among families in order Chaetophorales remain unclear. This study aimed to phylogenetically reconstruct order Chaetophorales and determine the taxonomic scheme and to further the current understanding of the evolution of order Chaetophorales . Results: In the present study, seven complete and five fragmentary chloroplast genomes were harvested. Phylogenomic and comparative genomic analysis were performed to determine the taxonomic scheme within Chaetophorales. Consequently, Oedogoniales was found to be a sister to a clade linking Chaetophorales and Chaetopeltidales. Schizomeriaceae, and Aphanochaetaceae clustered into a well-resolved basal clade in Chaetophorales, inconsistent with the results of phylogenetic analysis based on rDNA sequences. Comparative genomic analyses revealed that the chloroplast genomes of Schizomeriaceae and Aphanochaetaceae were highly conserved and homologous, highlighting the closest relationship in this order. Germination types of zoospores precisely correlated with the phylogenetic relationships. Conclusions: chloroplast genome structure analyses, synteny analyses, and zoospore germination analyses were concurrent with phylogenetic analyses based on the chloroplast genome, and all of them robustly determined the unique taxonomic scheme of Chaetophorales and the relationships of Oedogoniales, Chaetophorales, and Chaetopeltidales. |
| Databáze: | OpenAIRE |
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