Figure 2.

Positions of the eight drop loci. The eight loci (red) except drop-4 were mapped by SNP-based chromosome mapping and interval mapping. drop-4 was cloned as sams-1 and its genetic position is at X 6.80. Each of the other seven drop loci was positioned by the two closest encompassing SNPs underpinning. Genetic positions of these SNPs were extrapolated from wormbase.org and were located onto each linkage group/chromosome to scale. The four known genes, maoc-1 II, dhs-28 X, daf-22 II, and prx-10 III, were positioned accordingly for reference.