Recombination breakpoints in RIL.

For our AI-RIL, our F2 RIL, and the F2 RIL used to produce the previous C. briggsae genetic map cb3, the number of observed recombination breakpoints, averaged across the number of RIL, is given for each chromosome. The advanced-intercross design leads to greater breakpoint capture than in F2 RIL.aBreakpoint counts for the F2 RIL from [38] were obtained by re-estimating the cb3 genetic maps using their genotype data with Map Manager QTXb20 and averaging across the 93 lines they genotyped (Materials and Methods).