Drought Resistance Identification of New Wheat Lines at Germination Stage under PEG Stress
Drought stress seriously affected the seed germination and seedling quality of wheat.In order to identify the drought resistance of nine new self-selected wheat lines,20%PEG-6000 was used to simulate drought stress and Luohan 7 was used as the control.The related morphological indicators at seed germination stage were measured,and the drought resistance of the tested wheat materials was comprehensively evaluated using the membership function analysis method.The results showed that under drought stress,the germination potential,germination rate,germination index,radicle length,coleoptile length and germ length of wheat de-creased averagely by 32.9%,6.1%,27.3%,47.1%,15.4%and 66.6%,respectively.According to the result of comprehensive evaluation,it was concluded that KD7020-2 and Luohan 7 belonged to strong drought-resist-ant type,KDG07-6,KD7034-8,KD7053-9 and KD7043-8 belonged to moderate drought-resistant type,KD7047-2,KD6055-6 and KD701 belonged to weak drought-resistant type,and KDG03-1 belonged to non-drought-resistant type.According to the results of correlation analysis,the relative germination potential and relative germination index had the greatest influence on the D value,which could be used as rapid evaluation indicators for drought resistance identification at germination stage of wheat.
万方数据
维普
