Dear Editor,Genetic recombination results in novel allele combinations and is the most important genetic phenomenon for generating variation in breeding populations.However,in most organisms,the number of genetic recombinations is tightly constrained,which hampers the introgression of new genetic traits and limits genetic variation during agricultural breeding (Barakate et al.,2014).Therefore,the possibility of increasing genetic recombination frequency has attracted much interest from crop breeders because of the obvious practical applications in traditional breeding (Leflon et al.,2010;Crismani et al.,2012).However,to date,the goal of increasing the genetic recombination frequency has not been achieved in crop plants.