【摘要】 为探索干旱条件下大豆萌发特性,以山西省5个典型品种(晋豆36,晋豆19,晋遗31,晋大70,汾豆79)为材料,设置5个PEG-6000浓度(0%、5%、10%、15%、20%),模拟干旱胁迫处理,分析首日发芽率、发芽势、发芽率、发芽指数变化。结果表明,首日发芽率晋豆19(54.3%)极显著低于其他4个品种(之间差异不显著),0%和5%处理差异不显著,极显著高于其他3个处理(之间差异均极显著);发芽势汾豆79最高(96.3%),晋大70次之(之间差异不显著),显著高于晋豆19,发芽势随浓度升高而依次降低,0%、5%、10%之间差异不显著,极显著高于15%和20%(之间差异也极显著);发芽率汾豆79最高(99.7%),极显著高于晋豆36,20%处理极显著低于其他处理;发芽指数随浓度升高依次下降,其中20%处理极显著低于15%,两者均极显著低于其他3个处理(之间差异不显著)。因此,不同大豆品种抗旱萌发特性不同,整体抗旱能力和在不同时期抗旱性表现有差异;PEG-6000浓度15%～20%是较为理想的抗旱性筛选浓度。更多还原

【Abstract】 To explore the germination characteristics of soybeans under drought conditions,five typical varieties from Shanxi Province were used(Jindou 36,Jindou 19,Jinyi 31,Jinda 70,and Fendou 79),and the PEG-6000,with five concentrations(0%,5%,10%,15%,20%),was employed to simulate drought stress.The first day germination rate,germination potential,germination rate and germination index were analyzed.The results showed that the first day germination rate of Jindou 19(54.3%)was significantly lower than the other 4varieties which the difference was not significant,and the difference between 0%and 5%treatments was not significant,but significantly higher than the other 3treatments which the difference was extremely significant.As germination potential,Fendou 79(96.3%)was the highest,Jinda 70 was the second which the difference was not significant,significantly higher than Jindou 19,the germination potential was decreased with the increasing concentrations of PEG,the differences among 0%,5%,10% were not significant,but it is significantly higher than 15% and 20% which the difference was also very significant.The germination rate of Fendou 79(99.7%)was the highest,which was significantly higher than Jindou 36,and the 20%treatment was very significantly lower than other treatments.The germination index was increased with the concentration of PEG decreased,the 20%treatment was very significantly lower than that of 15%,They were extremely significantly lower than the other 3treatments which the difference was not significant.Therefore,it was different about drought resistance characteristics of different soybean varieties,and it was different about the overall drought resistance and drought resistance performance at different stages.The PEG-6000 concentration of 15%-20% was an ideal screening index for drought resistance.更多还原