The Pn rates of Jimai 3235 and Zhongmai 9 were greatly influenced by drought at flowering stage, this may be one reason for influencing their DRC and DRI.

• 冀麦 32 35、中麦 9号开花期光合速率受到很大抑制 ,可能是使其抗旱系数 (DRC)和抗旱指数 (DRI)较小并使其抗旱性较差的因素之一 ;