Regulation of Recombination at the His-3 Locus in Neurospora Crassa

Abstract

The frequency of prototrophic recombination between pairs of his-3 alleles is increased in the absence of the dominant gene reo-w+, which is probably the same as reo-4+. The locus of reo-w is in linkage group V. The degree of increase is determined by genes at a reoognition locus (oog) situated about 1� 3 units distally to the hi8-3 locus. In the presence of oog+, derived from Y8743 which has Lindegren wild stocks as ancestors, the increase is about 30-fold.