Figure 4.

Pairwise nucleotide diversity (π, averaged per gene) in (a) 10 IM lines and (b) 8 CP lines. Each point represents a gene annotated in the M. guttatus v. 2.0 reference genome. The heavy line denotes a 240-kb block of 15 contiguous genes in Rf2 with unusually low diversity (mean π = 0.004) in IM. Physical positions (Mb, v. 2.0 genome) are shown in the hatched bars between the data panels, but genes are ordered as in figure 2. The left segment corresponds to sc97 (inverted; Migut.G00884–G00829) and the right segment to sc14 (Migut.G01156–G001178) of the M. guttatus v. 1.0 genome. Blue denotes fine-mapped genetic markers; red denotes pentatricopeptide repeat genes; grey denotes genes excluded from analysis (15/60 Rf2 genes; 4/14 Rf1 genes).