Figure 2.

Scanning the linkage groups for their contribution to Bt resistance in family BC1. (a) Distribution of the homologues transmitted by the F₁ parent, derived from NO-QA and LAB-PS for each linkage group among Bt survivors and untreated controls. (b) χ² tests of independence between treatments (Bt survivors vs. untreated controls) and chromosomal origin (NO-QA vs. LAB-PS), conducted for each AFLP linkage group. The Bonferroni correction for 31 simultaneous statistical tests at the nominal level of α = 0.05 was used to evaluate the results, producing a corrected probability value of P = 0.0016 (0.05/31). Of the 31 linkage groups, only AFLP group 7 had a χ² value associated with a probability below this threshold (χ² = 21.8, df = 1, P < 0.0001), thus making a significant contribution to resistance.