Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (3): 17-24.doi: 10.11924/j.issn.1000-6850.casb2021-0216

Special Issue: 生物技术 园艺

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Identification and Evaluation of Drought Resistance in Sugarcane Seedling Stage

FAN Xian(), QUAN Yiji, YANG Shaolin, LI Rudan, DENG Jun, ZHANG Yuebin()   

  1. Yunnan Key Laboratory of Sugarcane Genetic Improvement, Sugarcane Research Institute, Yunnan Academy of Agricultural Science, Kaiyuan, Yunnan 661699
  • Received:2021-03-05 Revised:2021-08-17 Online:2022-01-25 Published:2022-02-25
  • Contact: ZHANG Yuebin E-mail:ynfanx87@163.com;ynzyb@sohu.com

Abstract:

Twelve sugarcane varieties were used in pot experiment. The survival rate of sugarcane seedlings, and chlorophyll content, soluble sugar content, malondialdehyde content and superoxide dismutase activity of leaves were measured under repeated drought stress at seedling stage. This article used drought resistance coefficient method and membership function value method, evaluated and identified the resistance of sugarcane physiological indexes under repeated drought stress at seedling stage, aiming to provide a method for the selection of drought resistant sugarcane varieties, as well as data support for drought resistant breeding of sugarcane and demonstration and promotion of drought resistant varieties in sugarcane areas. The results showed that after repeated drought - rehydration treatment, the seedling survival rate, leaf chlorophyll content, POD and SOD activity of all sugarcane varieties decreased, while the leaf Pro, REC, MDA and soluble sugar content increased significantly, and there were significant differences among sugarcane varieties. The drought resistance of ‘LC 09-15’, ‘GT 32’, ‘FN 08-3214’, ‘YZ 08-1609’, ‘YZ 11-1204’, ‘YZ 05-51’, ‘YR 11-450’ and ‘DZ 12-88’ were stronger than that of the control ‘ROC 22’. Through the screening and promotion of sugarcane varieties with excellent drought resistance, the problem caused by the character degradation of sugarcane variety ‘ROC 22’ in sugarcane area could be solved, providing sugarcane varieties with effective drought resistance in early spring and high yield stability.

Key words: drought resistance, sugarcane, seedling stage, physiological indexes, comprehensive evaluation

CLC Number: