Table 2 Sex ratio of offspring reared on Barbarea from pairs involving resistant flea beetles. Offspring were pooled for each type of cross. Binomial tests were performed with an expectation of 50% females (if an autosomal R-gene is present); none of the sex ratios differed significantly from 50%. For comparison, sex ratios of the offspring from intraline crosses reared on radish are also given; they were not significantly different from 50%
