Reciprocal crosses were made to analyze the intergeneric crossability and to obtain intergeneric hybrids between Raphauus sativus and four Sinapis species (S. alba. S. arvensis. S. pubescens and S. turgida ). Pollen germination in the pistil and development of hybrid embryos depended on the direction of each cross. The crossability was relatively higher when Sinapis species were used as pistillate parents, whereas S. pubescens was compatible with R. sativus only when used as pollen parent. By embryo rescue technique and/or conventional method, hybrid plants were produced in all intergeneric crosses between R. sativus and four species of Sinapis except for the cross of S. pubesceus x R. sativus due to strong prefertilization barriers. When Sinapis species were used as pistillate parents,