【摘要】 在略高于玉米萎蔫系数的干旱条件下,以出苗率和生物学产量耐旱系数之乘积为指标,测定了17个玉米自交系和10个杂交种的苗期抗旱性。并用模糊隶属法,以干旱胁迫下的胚芽鞘长度,出苗率,根重,生物学产量,脯氨酸含量,电导率和离体叶片保水力等指标对各品种耐旱性进行了拟合分析。结果表明,在略高于萎蔫系数的干旱条件下,以出苗率和生物学产量的耐旱系数之乘积为指标,可以准确鉴定玉米苗期的耐旱性,与耐旱性的综合评价拟合良好(相关系数r=0.914)。更多还原

【Abstract】 Drought tolerance in seedling stage of 17 inbreds and 10 hybrids of ma ize was detected under the dry condition using the product of drought tolerance coefficient of emergence ratio and biomass as the drought tolerance index. The fitting anal ysis on drought tolerance was made by fuzzy subordination method, using the indeces of coleoptile length, emergence ratio, root weight, biomass, proline content, electric conductivity and leaf water conservation capacity. The study showed that the product of drought t olerance coefficient of emergence ratio and biomass could be used as an index to evaluate drought tolerance of maize in seedling stage and the res ult was fitted well with comprehensive evaluation of drought tolerance.更多还原