We have two research projects. First, we are developing genetic linkage maps of Japanese morning glory using DNA markers, such as SNP markers and SSR markers. These maps will be utilized for finding quantitative trait loci (QTL) of flowering time, flower size, flower numbers and interspecific crossability. Second, we are trying to elucidate molecular mechanisms underlying the reproductive barriers in plants. We are studying hybrid weakness (rice), segregation distortion (rice) and pre-zygotic barriers (morning glory).