玉米回交导入系BC1F2代吐丝期叶片光合参数与耐旱性的关系

Abstract

Abstract: Under the treatments of the normal irrigation and drought stress at silking stage,39 kinds of BC1F2 backcross groups and their parents of corn were used as the experimental material.The relationship of photosynthetic parameters and the drought tolerance between the inbred lines and BC1F1 groups at silking stage and their drought resistance were explored.The result showed that the coefficient of net photosynthetic rate（Pn）,transpiration（Tr） and corn yield drought-resistant coefficient were positively correlated and corn yield,drought-resistant coefficient,the coefficient of net photosynthetic rate（Pn）,transpiration（Tr） had the major variance contribution ratio and total contribution ratio, and they could be used to evaluate the drought resistance of corn.It was concluded that one was drought-resistant,4 were the better and 34 was not drought-resistant in 39 kinds of maize inbred lines;In BC1F2 groups,12 drought-resistant kinds were founded,1 was relatively droughtresistant and 26 were not drought-resistant.By built the BC1F2 groups,13 kinds of BC1F2 groups with significantly higher drought resistance were achieved.

CLC Number:

S513

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The relationship between the drought tolerance and the leaf photosynthetic parameters of backcross import department BC1F2 at silking stage in corn

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