Fig. 1

Genomic content of Chr15W and composition of the sex determination region (SDR). a A Manhattan plot of Chr15W, based on GWAS using SNPs derived from aligning to a reference genome lacking Chr15Z. The Y axis is the negative logarithm of p values, and the red line indicates the Bonferroni cut off. b Count of LTR elements including Gypsy and Copia, as well as genes in 100-kb windows with a 50-kb step size. c Distribution of female-biased sequence on Chr15W, along with a more detailed view of the SDR below. Each colored block shows the log₂ of the ratio of female and male depth in 10-kb windows. Vertical gray lines below the figure show the boundaries of the contigs in the SDR. d Each tick represents a gene in the SDR. Colors indicate putative origins of the genes based on blastp versus the rest of the genome