Some traits of low temperature germplasm wheat under extremely unfavorableweather conditions

Through a long-term observation on the canopy temperature and some traits o f wheat the temperature germplasm of wheat was found to result in the wheat s having either a high or a low plant temperature. Under normal weather con ditions, the wheat having a low temperature germplasm. (LTG) demonstrated s everal 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 trait s including leaf functional duration, chlorophyll content, malondialdehyde content, transpiration rate, net photosynthesis rate, root vitality and ker nel plumpness. The wide adaptability of LTG wheat to a wide range of meteor o-ecological conditions could provide a valuable germplasm in breeding of g ood strains with broad-spectrum stress resistance.