5份野生垂穗披碱草种子萌发期耐旱性评价OA

The experiment aimed to screen drought tolerance Elymus nutans materials,and investigate changes in their drought tolerance during seed germination after propagation.Five wild Elymus nutans seeds collected from Xizang and their harvested seeds after propagation were used as materials,polyethylene glycol 6000(PEG-6000)solution was used to simulate drought stress,and germination experiments were carried out under laboratory conditions,to comprehensively evaluate the drought tolerance of their germination period.The results showed that the drought tolerance of five wild Elymus nutans seeds during germination was as follows:Shenzha County>Kangma County>Langkazi County>Suo County>Dangxiong County(SZX>KMX>LKZ>SX>DX).After field propagation,except for the SZX material which showed a decrease in drought tolerance during germination compared to the wild species,the drought tolerance of the other four materials increased compared to the wild species.The study shows that wild Elymus nutans materials collected from Shenzha County have the best drought tolerance and better production performance during seed germination,and can be used as drought tolerant materials for breeding and utilization.