Twenty eight CMS lines and their maintainers were evaluated for morphological and floral characters influencing outcrossing rate. The natural outcrossing rate upto 19.22 per cent was recorded in IR 58025A. The CMS lines IR 62829A, IR 70366A, IR 70369A and IR 68888A also showed appreciable amount of natural outcrossing. IR 62829A had most of the desirable characters followed by IR 58025A, IR 70369A, IR 70369A can be used exclusively for hybrid development after studying their combining ability.