COMPARISON OF DROUGHT RESISTANCE AT SEEDLING STAGE OF GERMPLASM RESOURCES OF FOUR SPECIES OF ELYMUS SPP.
This study aimed to analyze the physiological changes of different Elymus germplasms under drought stress at the seedling stage,in order to screen Elymus germplasm materials with strong drought resistance.The seeds of Elymus collected from four different regions were selected as testmaterials.By simulating continuous drought conditions,key physiological and biochemical indicators such as chlorophyll content,free proline content and soluble sugar content were determined.The membership function method was used to comprehensively evaluate the drought resistance of the fourmaterials.The results showed that the drought resistance of the fourmaterials was E4(E.sibiricum from Gangcha,Qinghai)＞E2(E.sibiricum from Wulingmountain,Beijing)＞E3(E.sibiricum from Wutaimountain,Shanxi)＞El(E.sibiricum from Ximeng,Innermongolia).It can be seen that E.sibiricum from Gangcha,Qinghai has strong drought resistance and is suitable for promotion and planting in arid areas.
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