116份藜麦种质资源萌发期抗旱性综合评价OACSTPCD

Different concentrations of PEG-6000 were used to simulate drought stress on 116 quinoa,inclu-ding Black quinoa(black grain),Qinghaihong(red grain),Qaidam red(red grain),Snow quinoa(white grain)and Qingli 1(white grain)to determine the appropriate concentration for drought resistance identification during germination.Drought resistance of different types of quinoa germplasm resources during germination was identified.The drought resistance of quinoa cultivars was evaluated and classified by principal component analysis,membership function method and cluster analysis based on 8 indexes of germination stage,including germination rate,germination energy,germination index,vigor index,bud length,root length,fresh mass and drought toler-ance index.The results showed that 20％PEG-6000 was the appropriate concentration for stress test.The drought resistance of 116 quinoa germplasm resources from different sources was identified by 20％PEG-6000 and the val-ues of each index were determined.Then the weighted membership function values of different quinoa cultivars were calculated by principal component analysis and membership function method,and the drought resistance was ranked.The experimental materials were categorized into three groups using cluster analysis.Within the second group,the first subgroup(Ⅱ1)comprised 29 quinoa varieties exhibiting strong drought resistance.These varieties are recommended as basic materials for developing drought-resistant strains in subsequent breeding efforts.