Schematic diagrams of the two mechanisms of spheroidal colony formation in the volvocine algae. [Image credit: from By Yamashita S1, Arakaki Y1, Kawai-Toyooka H1, Noga A1, Hirono M2, Nozaki H3. Author information 1 Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. 2 Department of Frontier Bioscience, Faculty of Bioscience and Applied Chemistry, Hosei University, 3-7-2 Kajino-cho, Koganei-shi, Tokyo, 184-8584, Japan. 3 Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. [email protected]. - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5103382/figure/Fig4/, CC BY 4.0, via wikimedia]

The Astrephomene gubernaculifera NIES-4017 genome assembly and gene models have not been determined by the JGI, but were downloaded from NCBI (assembly GCA_021605115.1) on October 25, 2022. In order to ensure this genome is comparable to those sequenced by the JGI, we applied filters to remove if present: 1) transposable elements, 2) pseudogenes, 3) alternative transcripts and overlapping models, 4) alleles on secondary scaffolds and 5) unsupported short models. This resulted in the removal of 646 models and the generation of the FilteredModels1 (GeneCatalog) gene track. All published models are available in the ExternalModels track. Please note that this copy of the genome is not maintained by NCBI and is therefore not automatically updated. In order to allow comparative analyses with other algal genomes sequenced by the JGI, a copy of this genome is incorporated into PhycoCosm. The JGI Annotation Pipeline was used to add functional annotation to the genes.

Astrephomene gubernaculifera NIES-4017

Astrephomene gubernaculifera NIES-4017 (Archaeplastida, Viridiplantae, Phylum Chlorophyta, Class Astrephomenaceae) is a volvocine alga, one of the models for the evolution of multicellularity in eukaryotic organisms. A. gubernaculifera and Volvox carteri exhibit convergent evolution of differentiation between somatic cells and reproductive (germline) cells.