Some traits of low temperature germplasm wheat under extremely unfavorable weather conditions  

作　　者：张嵩午 王长发 冯佰利 苗芳 周春菊 张荣萍 

机构地区：[1]Northwest Science and Technology University of Agriculture and Forestry, Yangling 712100, China

出　　处：《Progress in Natural Science:Materials International》2001年第12期911-917,共7页自然科学进展·国际材料（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 39570411, 39870477).

摘　　要：Through a long-term observation on the canopy temperature and some traits of wheat the temperature germplasm of wheat was found to result in the wheats having either a high or a low plant temperature. Under normal weather conditions, the wheat having a low temperature germplasm (LTG) demonstrated several advantageous physiologi-cal and agronomic traits than those having a high temperature germplasm (HTG). Under the extremely unfavorableweather conditions, such as rainy weather or severe drought, LTG wheat still could maintain its superiority to HTG wheat in physiological and agronomic traits including leaf functional duration, chlorophyll content, malondialdehyde content, transpiration rate, net photosynthesis rate, root vitality and kernel plumpness. The wide adaptability of LTG wheat to awide range of meteoro-ecological conditions could provide a valuable germplasm in breeding of good strains with broad-spectrum stress resistance.Through a long-term observation on the canopy temperature and some traits of wheat the temperature germplasm of wheat was found to result in the wheats having either a high or a low plant temperature. Under normal weather conditions, the wheat having a low temperature germplasm. (LTG) demonstrated several advantageous physiological and agronomic traits than those having a high temperature, germplasm ( HTC). Under the extremely unfavorable weather conditions, such as rainy weather or severe drought, LTG wheat still could maintain its superiority to HTG wheat in physiological and agronomic traits including leaf functional duration, chlorophyll content, malondialdehyde content, transpiration rate, net photosynthesis rate, root vitality and kernel plumpness. The wide adaptability of LTG wheat to a wide range of meteoro-ecological conditions could provide a valuable germplasm in breeding of good strains with broad-spectrum stress resistance.

关 键 词：WHEAT rainy weather DROUGHT low temperature germplasm traits. 

分 类 号：S512[农业科学—作物学]