Fig. 4
From: Chromosome-scale assembly and annotation of the perennial ryegrass genome
Comparative gene family analysis. a Gene family expansion plots show the relatively stable gene family size in L. perenne compared to seven closely related grass species. b Phylogenetic analysis of the ELF4 family shows that one clade contains multiple duplicated L. perenne genes. c Constans / VRN2 gene family analysis (CCT domain; HOM05M000693) shows the presence of multiple copies of VRN2 genes (ZCCT domain; ORTHO05M004293) in Ae. tauschii, S. cereale, and L. perenne, a single copy gene in B. distachyon, Z. mays, O. sativa ssp. japonica, and absence in S. bicolor and H. vulgare Morex_V2. The phylogenetic tree further shows that a sister clade to CO is specifically expanded in the Pooideae (Bd, Lp, Sc, Ae, Hv). See Fig. S5 for complete gene names. d FT gene family analysis (PEBP domain; HOM05M000217) shows relatively stable numbers of genes across species, and identifies the MFT, TFL, FT-I and FT-II clades [52]. e Histone demethylase gene family analysis (histone demethylase; HOM05M000330) identifies the FLD clade with single orthologous members across the grass species. Eight species are included in the comparative analysis: 5 of the Pooideae (Ae. tauschii (Ae), L. perenne (Lp), H. vulgare Morex_V2 (Hv), B. distachyon (Bd), S. cereale (Sc)) and O. sativa ssp. japonica (Os), S. bicolor (Sb), Z. mays (Zm) as more distantly related grass species