Abstract:Three wheat cultivars sensitive to chlorotoluron,Sumai No.3,Wangshuibai andNing 7840,and two tolerent ones,Ningmai No.6 and Yangmai No.5,as well astheir F1s and some F2s and backcross generations were studied to determine the inher-itance of chlorotoluron sensitivity.The herbicide was sprayed at a r