以35份玉米自交系为试验材料,采用渗透压为0.4 MPa的PEG-6000溶液模拟干旱胁迫,以发芽势、发芽率、萌发抗旱指数、贮藏物质转运率、胚根数、胚根长、胚芽长作为测定指标,利用抗旱系数(DC值)、主成分分析和聚类分析对玉米自交系的抗旱能力进行综合评价和分类。结果表明,干旱胁迫对各项指标均产生了不同程度的影响,结合主成分分析和聚类分析,鉴定出抗旱型材料4份,分别是1153、1245、1246和PHT11,干旱敏感型材料3份,分别是PHJR5、LH284和A14242,其他28份为较抗旱型和干旱较敏感型材料。
英文摘要:
35 maize inbred lines were used as the material, germination energy, germination rate, germination drought resistance index, storage material transfer rate, number of radicles,radicle length and germ length were studied under 0.4 MPa PEG-6000 at germination stage. Comprehensive evaluation and classification of drought resistance of maize inbred lines using drought resistance coefficient (DC), principal component analysis and cluster analysis. Results showed that drought stress influence all indicators, four drought tolerant materials (1153、1245、1246and PHT11 ), three drought sensitive materials (PHJR5、LH284 and A14242), twenty-eight relatively drought tolerant and relatively drought sensitive materials were identified out.
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