A factor from Neurospora sitophila was shown, prior to this study, to affect recombination in linkage group I.
Hybrid strains of Neurospora carrying a N. Sitophila factor in a N. crassa background were used to study the effect of the factor in interallelic crosses and to compare it to its effect in intergenic crosses.
Lombard, Anne-Marie Lucienne, "Some effects of factors for the control of recombination in neurospora" (1974). EE 4BI6 Electrical Engineering Biomedical Capstones. Paper 65.