| Eighteen cotton cultivars (Gossypium hiristurum) suitable for North Xinjiang were used to study the effect of prolonged drought during late stage on cotton yield, growth and development. And the drought resistance of these cultivars was also evaluated by weighted fuzzy subordinative functi
on method. The results showed that yield components including boll size, boll number, seeds yield and lint percent, and parameters of growth and development such as the single functional leaf area, fresh mass, dry mass and plant height decreased significantly as compared to the normal irrigation. But the dry matter of stay-green leaf increased significantly, and the variations of seed yield was the highest for the drought treatment, with a reduction by 46.80%. The results of drought resistance evaluation differed when using fuzzy subordinative function method. The drought resistance was mainly associated with boll number, leaf area, dry matter, and seed cotton yield (in the order of significance).Cultivars of Jinmian 13, 297-5, Xinluzao No.8, Xinluzao No.26 and Xinluzao No.35 were high resistant, whereas Yinong 2, Xinluzao No.13, 18-3, 81-3，and 134-1 were sensitive. |