The gene composition of the genome region co-segregating with the Z-locus in perennial ryegrass (Lolium perenne L.). Given are the genotypes F1-30 (haplotype P205, above) and the doubled haploid genotype Kyuss (below). The sequence of the Z-locus is continuous, but for clarity, the gene- and marker-less regions are represented as shaded breaks. The genes are represented with bars, and their orientation is shown with the pointy side representing the 3′ end. The self-incompatibility candidate genes are colored in teal and blue. The markers used for the fine-mapping are represented by black bars, and the number of recombinants for each marker is indicated between brackets. The synteny between homologous genes is illustrated with lines connecting the two haplotypes, and in case of orientation change, a small circular arrow is used. On the right, the compatibility phenotype is indicated (SI, self-incompatible).