| The aim was to study the response difference of six dominant Yunnan sugarcane varieties including ROC22,
Mintang69-421, Guitang11, Yuetang86-368, Yuetang93-159, Dianzhe01-58 to drought stress. Using the method of greenhouse
potted plants and artificial water control, drought stress was conducted to six sugarcane varieties in elongation stage, then
morphological indexes including group of plant height, stem diameter, effective stem and physiological indexes including
proline content, soluble sugar content, chlorophyll content, net photosynthetic rate, stomatal conductance, transpiration rate
of the tested varieties were surveyed. The results showed that the method of fuzzy membership function and system
clustering analysis integrated all kinds of physiological indexes, was a more scientific resistance identification method for
the comparison of multiple varieties. According to physiological indexes combined with morphological indicators, ROC22
and Yuetang86-368 were the varieties with high drought resistance, which were suitable for planting in Yunnan drought
areas. |
