Figure 1.

SNP density, haplotypes, and crossover (CO) counts of chromosome 3. (A) The SNP density for chromosome 3 (length $\sim$2.1 Mb) across the progeny from the XL280a × 431α and XL280αSS × 431α crosses, calculated as the number of SNPs per 10 kb (total: 9779 SNPs). (B) Haplotypes, inferred from SNP data, are displayed as blue if inherited from XL280 (a or αSS) or orange if inherited from 431α for 10 segregants, five from the a–α bisexual (black) and five from the α–α unisexual (red) crosses. The position of the centromere is displayed in black. (C) CO counts (y-axis) along chromosome 3 (x-axis) for segregants from the a–α bisexual (black) and α–α unisexual (red) crosses. COs are detected by changes in genotype between two contiguous SNPs.