不同玉米品种萌芽期抗旱性研究

Drought Resistance of Different Maize Varieties in Germination Stage

通过PEG渗透胁迫人工模拟干旱条件,对不同的玉米品种川单 15号、黔单 11号、户单 2000、成单 19、安单 136、黔单13号、三北六号、农大 3138、正红 6号进行了萌芽期抗旱性研究。结果表明:水分胁迫降低了各玉米品种的发芽势和发芽率,阻碍了胚芽和胚根的生长,降低了种子中贮藏物质的利用效率。但不同的玉米品种在抗旱性上存在极显著差异,抗旱性强的品种在水分胁迫下仍然保持较高的发芽势和发芽率。通过对上述指标的测定可以较好地反映出玉米品种萌芽期的抗旱性。

The study on drought resistance of nine varieties in germination stage was conducted through adopting PEG solution simulated soil drought treatment. The results showed that the germinating vigor and germinating rate,the growth rate of embryo bud and root,and the transformation percentage of stored substance were all decreased by water stress. There were obvious difference on drought resistance among the varieties, higher drought resistance varieties kept higher vigor of germination and germination (capacity). Evaluations based on these indexes could reflect the drought resistance traits of maize in seedling (germination) stage.