| Six tomato cultivars (Fen HV-071, Zhonga No. 9, Jinzhu HV-029, Dashengnv HV-073, Lvguo and TTI1103B-2)were treated for 12 days with 6 different osmotic concentrations of PEG 6000 (7. 5%、10% 、12. 5%、15%、17.5% and 20% )respectively during germination stage. Germination energy，germination rate and other 6 germi-nation indexes were measured and analyzed by subordinate function and grey correlative degree analysis methods for screening the optimum osmotic stress concentration and evaluation indexes of drought resistance identification of tomato at gemination stage . The results showed that the 10%~12.5% PEG 6000 was the optimum concentration and the vitality index was a reliable index to identify the drought resistance of tomato during germination stage. The drought resistance of the six varieties decreased in the order as: Fen HV-071, Zhonqa No. 9, Jinzhu HV-029，Dashengnv HV-073, Lvguo and TTI1103B-2, and the drought resistance of Fen HV-071, Zhongza No.9 was significantly higher than that of Lvguo and TTI1103B-2. The correlation order of drought resistance with indexes was : vitality index> germination rate > gemination energy> gemination index> gemination speed> hypocotyl damage rate> radicle damage rate>seeding damage rate. |