ArticleThe New phytologist2025
Evolution of sexual systems and regressive evolution in Riccia.
Article in The New phytologist, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Genome assemblies of the liverwort Blasia pusilla uncover a well-defined pseudoautosomal region on homomorphic UV sex chromosomes.Genome biology · 2026Article
- Article
- Habitat-specific alternative splicing shifts and the 5mC methylation landscape of differentially spliced genes inFrontiers in plant science · 2026Article
- Evolutionary history of sex and accessory chromosomes in hornworts.The New phytologist · 2025Article
- The Complete Chloroplast Genome of Water Crowfoot ofInternational journal of molecular sciences · 2025Article
- Sex chromosome evolution in haploid plants: Microchromosomes, disappearing chromosomes, and giant chromosomes.Proceedings of the National Academy of Sciences of the United States of America · 2025Review
- TAILcaller: an R package for analyzing differences in poly(A) tail length for Oxford Nanopore RNA sequencing.Bioinformatics advances · 2025Article
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14 authors.
Funding
Abstract
The genus Riccia is the most speciose of the Marchantiopsida, the complex thalloid liverworts. In contrast to the predicted ancestral liverwort and the majority of extant liverworts that are dioicous, most Riccia species are monoicous. Both the gametophyte and the sporophyte generations have undergone regressive evolution in Riccia, with the sporophyte lacking many adaptations for spore dispersal. Phylogenetic reconstructions suggest multiple transitions between dioicy and monoicy, and vice versa, within the Riccia. We analysed the genomes of two Riccia species and the transcriptomes of two additional Riccia species to explore the evolution of sexual systems and investigate genomic signatures of regressive evolution. Genomic analyses suggest a transition from dioicy to monoicy at the base of the Riccia clade and a subsequent reversion to dioicy with the concomitant evolution of a new sex chromosome, followed by further transitions back to monoicy. Additionally, Riccia species exhibit significant losses of transcription factors known to control aspects of sporophyte and gametophyte development. Comparisons with the monotypic sister genus, Ricciocarpos, suggest independent evolutions to both monoicy and reductive morphologies in the two genera. The reductive morphology has facilitated their colonization of extreme habitats but has perhaps canalized them to remain there.
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