| varieties. Seven indexes closely related to the drought tolerance were measured, including rate of green
leaves, plant height and other morphological indicators as well as the plasma membrance permeablitiy, chlorophyll content,
proline content, MDA content and superoxide dismutase activity and other physiological indicators. Using principal
component analysis, fuzzy membership functions for multi-index comprehensive analysis to evaluate the drought resistance
of the seven sugarcane varieties. The results showed that three principal components could achieve 94.943% of the original
amount of information. By the cluster analysis, the seven tested varieties were divided into three categories. ROC22 and
Yunzhe06-407 performanced strong drought resistance, Funong39 and Yuetang55 showed moderate drought resistance,
ROC16, Yuegan26 and liucheng05-136 showed weak drought resistance |
