Distribution of the number of probes in the Nipponbare genome. Distribution of the number of unique probes (a), predicted SFPs (b), correctly and falsely called SFPs (c), and sensitivity of SFP detection (d) in a 1-Mb window with a step width of 0.1 Mb. SFPs were called by SAM at a threshold of delta = 0.378. TRUE and FALSE are the same as in Table 2. Red lines indicate averages through the genome.