Fig. 2

QTL profiles for single marker mapping of avoidance behavior. QTL analysis of avoidance of: (a) E. coli OP50; (b) the non-nematocidal B. thuringiensis DSM350; (c) nematocidal B-18247; and (d) highly nematocidal B-18679. The X-axis shows the markers along the five autosomes and the X chromosome. Vertical light gray lines denote the boundaries between chromosomes. The Y-axis indicates the association between the chromosomal markers and variation in avoidance. Significance is indicated by –log10 of the p-value obtained from the linear model, which is multiplied by the sign of the effect to indicate the N2 allelic effect on avoidance. A value above 0 indicates an increase in leaving caused by the N2 allele; a value below 0 indicates an increase in leaving caused by the CB4856 allele. By convention, values above +2 or below -2 are considered to indicate a significant influence. Green and red lines show the results after either 14 h or 24 h exposure, respectively