Representative allelic segregation patterns observed in the four spores of a tetrad, as defined in Anderson et al. 2011.

CO-Crossover, NCO-Non crossover, GC- Gene conversion, LOH-Loss of heterozygosity event during meiosis. Reported numbers are the counts of such events detected across the 192 tetrads. a) CO without GC. b-d) CO with GC on a chromatid either involved or not involved in the CO. e) CO with complex GC. f) CO with GC on a chromatid not involved in the CO. g) Double CO without GC. Note that five loci showed a double CO signature in all the tetrads. These double COs were inferred to have resulted from mitotic COs in the parental hybrid and were filtered out and not included here. However, because of marker densities issues, 48 of the 68 double COs from this "g" category escaped the filtering. It remains a maximum of 20 double COs of this "g" class that are of meiotic origin. h) Double CO with GC. i) Double CO with complex GC. j) Simple NCO. k) 4:0 GC tract. (TIF)