Map distances from 4 spore-viable tetrads carrying S. cerevisiae or K. lactis ZIP1.

* For the intervals marked with an *, interference measurements are not robust due to low numbers of NPD tetrads.Gene conversion events in these tetrads are given in S4 Table.Map distances were calculated using tetrad analysis (as indicated in Methods), in S. c. ZIP1- expressing and K. l. ZIP1-expressing strains (YT131, YT125, AM3313 and YT152). Tetrad analysis to generate genetic distances, interference (and standard error (S.E.) values using tetrad data were calculated using the Stahl lab online tools: http://molbio.uoregon.edu/~fstahl/. Interference was measured by calculating the ratio of Non Parental Ditype tetrads (NPDs) observed over the NPDs expected (values less than one reflect positive interference). NPDs expected for each interval were calculated using the fraction of tetratypes (TT) observed in each dataset according to the formula: NPDexp = 1/2(1-fTT-[1-3fTT/2]2/3 (where fTT = fraction of tetratypes) [76].