Abstract: Seed germinability of NC55， NC297， G28， MS Yunyan85 and MS Yunyan87 were measured after harvest to determine the dormant period of seeds of different tobacco varieties. Results showed that seeds of NC55 had short\|term dormancy about 10 days during the experiment. Dormancy had not been found in seeds of other cultivars. The results indicated that short\|term dormancy could be related to the varieties， thus， the seeds for field production should be selected according to the dormancy character of the varieties.

Key words: tobacco, seed, germinability, dormancy