Recombination outcomes in EM93.

The total number of crossovers (CO) (A) and non-crossover gene conversion (NCOGC) (B) events was identified in 120 tetrads. As both CO and NCOGC events are induced by a double-stranded-break (DSB), the sum of CO and NCOGC events reflects the total number of DSBs induced per genome and meiosis (C). The number of COs (D), NCOGCs (E), and DSBs (F) events per chromosome is linearly related to the chromosomal length. This corresponds to 0.6 obligatory CO, plus an additional 6.5 COs per megabases (Mb); 0.04 obligatory NCOGC, plus an extra 2.6 NCOGCs per Mb; 0.6 obligatory DSB plus an additional 9.0 DSBs per Mb.