Recently, using molecular genetic studies, arabidopsis wasfound to contain protein factors that act against the conversionof DSBs into class II crossovers: DNA helicase FANCM(Fanconi anemia complementation group M) (Crismani et al.,2012; Girard et al., 2014), FIGL1 (AAA-ATPase FIDGETINLIKE1)(Fasching et al., 2015; Girard et al., 2015), BTRcomplex of DNA helicases RECQ4A and RECQ4B and topoisomeraseTOP3α (Séguéla-Arnaud et al., 2015). This evidence concerns the gene FANCM and Fanconi anemia.