Fig. 4.

Genetic hitchhiking in the genome. Overrepresentation of SDV in 10-kb sliding windows with 2-kb steps in the five major chromosome arms in the Drosophila melanogaster genome. Each dot represents a 10-kb window and the purple-dotted lines indicate the genomewide multiple testing threshold at FDR ≤ 0.005. Notice the x axis is in Mb scale; hence, multiple significant windows that are ≥50 kb apart may appear indistinguishable. Almost 50% of the significant windows are on chromosome 2 and 24% are on chromosome X.