Both the salad rocket (Eruca sativa) and the perennial wall rocket (Diplotaxis tenuifolia) are distributed as rucola.For both species no hybrid system is available.To introduce CMS into rucola breeding lines,male sterile cauliflower cv.Korso was pollinated by E.sativa and D.tenuifolia.F1 plants were obtained from both cross combinations at a low frequency by an embryo rescue approach.All plants expressed an intermediate phenotype and growth habit as well as male sterile flowers.