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Evolution of sexual systems and regressive evolution in Riccia.

Levins, J., et al. · 2025 · New Phytologist 10.1111/nph.20454   research

doi:10.1111/nph.20454   PMID:39925326   PMC11923412

Linked genes (10)  0 core 10 peripheral

Gene ID	Name	Evidence / Role	Function (this paper)
Mp8g18310	MpBELL1	citation comparator	Cited as the Marchantia BELL1 gene acting with KNOX2 in sporophyte cell wall modification; used as comparator, reported absent in examined Riccia species.
MpUg00370	MpBPCU	citation comparator	Cited as the Marchantia U-linked feminizer (BPC on U) promoting female development via suppression of MpSUF; used as comparator, ortholog reported missing in Riccia.
MpVg00350	MpBPCV	citation comparator	Cited as the Marchantia V-chromosome BPC gametolog promoting reproductive transition without sex-determining function; used as comparator for Riccia ortholog retention.
Mp1g13010	MpDUO1	citation comparator	Cited as the Marchantia transcription factor promoting sperm cell differentiation; used as a reference gene tracked in Riccia genomes.
Mp1g17210	MpFGMYB	citation comparator	Cited as the autosomal female-promoting MYB gene that MpBPCU activates and MpSUF represses in Marchantia. Used as a reference whose Riccia orthologs are tracked across chromosomes.
Mp5g01600	MpKNOX1	citation comparator	Cited as the Marchantia KNOX1 gene required to initiate diploid sporophyte development; used as comparator for ortholog presence in Riccia.
Mp7g05320	MpKNOX2	citation comparator	Cited as the Marchantia KNOX2 gene directing sporophyte secondary cell wall modifications; used as comparator, reported absent in some Riccia species.
Mp3g04030	MpRKD	citation comparator	Cited as the Marchantia RKD transcription factor promoting egg cell differentiation; used as a reference gene whose Riccia orthologs are located.
—	MpSUF missing	citation comparator	Cited as the Marchantia suppressor-of-feminization antisense transcript repressing MpFGMYB. Used as comparator; its orthologs reported missing in R. sorocarpa and R. fluitans.
Mp3g23300	MpBNB	citation background	Cited as a Marchantia regulator within the developmental gene framework used to interpret Riccia genomes; not directly analyzed here.