The genomic landscape at a late stage of stickleback speciation: High genomic divergence interspersed by small localized regions of introgression
Fig 5
Fewer introgression valleys occur on the neo-X chromosome.
(A) A greater number of GMIN valleys occur in sympatry than in allopatry between species. (B) GMIN valleys and fd peaks also occur in regions of the genome with a higher recombination rate. Fewer valleys occur on the neo-X chromosome (chrIX; shown in pink) compared to autosomes (C), even when chromosome length is taken into consideration (D); N.B.–data for (C) and (D) were measured using females only. Green shows the ancestral sex chromosome (chrXIX).