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Taxonomic scheme of the order Chaetophorales (Chlorophyceae, Chlorophyta) based on chloroplast genomes
- Source :
- BMC Genomics, Vol 21, Iss 1, Pp 1-12 (2020), BMC Genomics
- Publication Year :
- 2020
- Publisher :
- BMC, 2020.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- Language :
- English
- ISSN :
- 14712164
- Volume :
- 21
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- BMC Genomics
- Accession number :
- edsair.doi.dedup.....5f5fb1896b88ffc0507a3e699f24df97
- Full Text :
- https://doi.org/10.1186/s12864-020-06845-y