Female- and male-specific linkage-group maps for H. arborea: (a) LG1, (b) LG2, (c) LG3, (d) LG4, (e) LG5 and (f) LG6. Provided is the order with the highest log likelihood (Crimap v. 5.0, option ALL). Locus positions are indicated by their distance in centimorgans from the ‘top’ of the linkage group.