The expanded Bostrychia moritziana genome unveils evolution in the most diverse and complex order of red algae DOI Creative Commons
Romy Petroll,

John A. West,

Michael Ogden

et al.

Current Biology, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Red algae are an ancient eukaryotic lineage that were among the first to evolve multicellularity. Although they share a common origin with modern-day plants and display complex multicellular development, comprehensive genome data from most highly evolved red algal groups remain scarce. Here, we present chromosome-level assembly of Bostrychia moritziana, seaweed in Rhodomelaceae family Ceramiales-the largest diverse order algae. Contrary view genomes typically small, report significant size expansion other Ceramiales, which represents one at least three independent events evolution. Our analyses suggest these expansions do not involve polyploidy or whole-genome duplications, but rather stem proliferation single giant Plavaka DNA transposons. Consistent its enlarged genome, has increased gene content shaped by de novo emergence amplified families providing insight into genetic adaptations underpinning this successful species-rich order. Finally, our sex-specific assemblies resolve UV sex chromosomes Bostrychia, feature expanded gene-rich sex-linked regions. Notably, each chromosome harbors amino acid loop extension homeodomain (TALE-HD) transcription factor orthologous regulators haploid-diploid transitions lineages. Together, findings offer unique perspective genomic driving diversity demonstrate how can provide evolutionary origins universal principles

Language: Английский

The expanded Bostrychia moritziana genome unveils evolution in the most diverse and complex order of red algae DOI Creative Commons
Romy Petroll,

John A. West,

Michael Ogden

et al.

Current Biology, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Red algae are an ancient eukaryotic lineage that were among the first to evolve multicellularity. Although they share a common origin with modern-day plants and display complex multicellular development, comprehensive genome data from most highly evolved red algal groups remain scarce. Here, we present chromosome-level assembly of Bostrychia moritziana, seaweed in Rhodomelaceae family Ceramiales-the largest diverse order algae. Contrary view genomes typically small, report significant size expansion other Ceramiales, which represents one at least three independent events evolution. Our analyses suggest these expansions do not involve polyploidy or whole-genome duplications, but rather stem proliferation single giant Plavaka DNA transposons. Consistent its enlarged genome, has increased gene content shaped by de novo emergence amplified families providing insight into genetic adaptations underpinning this successful species-rich order. Finally, our sex-specific assemblies resolve UV sex chromosomes Bostrychia, feature expanded gene-rich sex-linked regions. Notably, each chromosome harbors amino acid loop extension homeodomain (TALE-HD) transcription factor orthologous regulators haploid-diploid transitions lineages. Together, findings offer unique perspective genomic driving diversity demonstrate how can provide evolutionary origins universal principles

Language: Английский

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