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Regions of the D. pseudoobscura X chromosome implicated in hybrid sterility between the Bogota and USA subspecies (54). Recent genetic analysis of segregation distortion in the same hybridization implicates approximately the same chromosomal regions (53). The markers shown are all visible mutations. Kosambi-corrected map positions are provided. [Reproduced with permission from ref. 54 (Copyright 2001, Genetics Society of America).]
