the rate of abortive pollens was 99.97%; the outcrossed seed setting rate was 45.5%; the stigma exsertion rate was 87.1% with 56.5% of double-stigma exsertion rate.

• 该不育系农艺性状稳定；株型较好；不育株率达100%25；花粉败育率达99.；97%25；柱头外露率87