Synteny maps of the S-locus of multiple genotypes from the Poeae tribe. For the Lolium perenne L. genotype S23 Z and Lolium multiflorum Lam., both haplotypes of the diploid assemblies are given. The phylogenetic tree (left), representing the different species, was drawn according to the NCBI taxonomy database. The gene- and marker-less regions are represented as shaded breaks, and a white space indicates an assembly gap. The genes present at the S-locus are represented with directed arrows, and the self-incompatibility candidate genes are colored in teal and blue. The gene orientation is shown with the pointy side representing the 3′ end. The markers used for the fine-mapping are represented by black bars, and the number of recombinants for each marker is indicated between brackets for L. perenne Kyuss and P226/135/16. The synteny between genes is illustrated by lines, and in case of orientation change, a small circular arrow is used. In addition, the compatibility phenotype of the genotype is indicated on the right: self-incompatible (SI) or self-compatible (SC).