Figure 4.

Estimates of the relationship between physical/cytogenetic and genetic distance (black line) for L. perenne/F. pratensis chromosomes (C) 1–7. Physical/cytogenetic distances (horizontal axis) were derived from the L. perenne/F. pratensis introgression mapping population and genetic distances (vertical axis) from a L. perenne F2 genetic mapping population; both types of distances are expressed as % of the total observed for each chromosome. The cumulative % total of rice-anchored markers mapped in each physical bin for L. perenne/F. pratensis chromosomes 1–7 is indicated by the dotted line. The vertical arrowhead above each x axis indicates the approximate positions of the centromere for each chromosome.