【摘要】 选用 12个大豆品种 (系 ) ,于大豆开花结荚期 ,分别在正常供水与水分胁迫条件下 ,研究了与抗旱性有关的 4类生理指标 ,并结合大田试验结果进行了抗旱性综合分析。结果表明 ,叶片相对含水量 (RWC)、相对电导率、净光合速率 (Pn)与超氧化物歧化酶 (SOD)活性与大豆抗旱性(DC)密切相关 ,此 4项生理指标的隶属函数加权平均值 (D值 )与抗旱系数的相关系数达极显著水平 ,表明D值可用于大豆品种的抗旱性评价与分级。对大豆抗旱育种的方法进行了讨论更多还原

【Abstract】 In this paper,twelve soybean varieties was selected., four physiological indexes related to drought resistance in flowering poding stage were studied in both normal and drought conditions.The results were as follows:The weighed average of subordinate function(D) values of four physiological indexes-relative water content(RWC),relative conductivity,net photosynthesis velocity (Pn) and the activity of superoxide dismutase(SOD) and drought resistance of Soybean was positively significant(r=0 877 3,P<0 01).D value could be used to the evaluation of drought resistance for soybean varieties.At last,methods of soybean breeding for high yield and drought resistance were discussed.更多还原