Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (4): 982-990.DOI: 10.3969/j.issn.1000-2561.2021.04.011

• Plant Cultivation, Physiology & Biochemistry • Previous Articles     Next Articles

Growth and Decline of Sugarcane Cultivar ‘ROC22’ in Guangxi Sugarcane Area from 2008 to 2017

LIANG Qiang, LIU Xiaoyan, LI Yijie, LIN Li, WANG Zeping, LI Xiang, SONG Xiupeng, ZHOU Hui, LIN Shanhai, LI Yangrui**()   

  1. Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences / Sugarcane Research Center, Chinese Academy of Agricultural Sciences / Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs / Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, Guangxi 530007, China
  • Received:2020-03-28 Revised:2020-06-14 Online:2021-04-25 Published:2021-04-25
  • Contact: LI Yangrui


‘ROC22’ was the most important sugarcane cultivar in Guangxi sugarcane production from 2008 to 2017. In this study, the performances of the agronomic traits of ‘ROC22’ in the regional trials of the new sugarcane cultivars in Guangxi during this period were investigated, combined with the analyses of its production performance, the changes in its planting area and economic benefit, to provide a reference for sugarcane breeding and cultivation. The tillering and ratoon-shooting ability of ‘ROC22’ declined with year increase while the plant height and stalk diameter fluctuated in a certain degree. Since 2012, the average productivity of ‘ROC22’ had been decreasing continuously, and its sucrose content also has been declining in a certain degree, especially declined more dramatically in November. The smut incidence rate had risen rapidly from 2.94% to 9.02%, and this disease had become the most important disease in Guangxi sugarcane production. The borer damage degree had been getting heavier year by year, and the rate of heart-withered shoots has risen from 2.29% to 4.27%. The planting area of this cultivar reached a peak in 2011, and then began decreasing rapidly, from 756.4×103 hm2 to 255.9×103 hm2, or 69.5% to 31.6% in proportion. The Guangxi farmers’ income from planting this cultivar decreased from 34.04 billion RMB in 2011/2012 milling season to 11.52 billion RMB in 2017/2018 milling season. It was concluded that ‘ROC22’ has contributed greatly to the development of Guangxi cane sugar industry as the main sugarcane cultivar for many years, but its characters have been degenerated dramatically with the increasing of planting years, its damage by pests and diseases has been heavier, and cane yield and sucrose content has been decreased considerably, so it will be unavoidable to be replaced by other new elite cultivars.

Key words: sugarcane, variety, ROC22, commercial character, distribution change

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