Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (34): 107-112.doi: 10.11924/j.issn.1000-6850.casb2021-1064

Special Issue: 生物技术 园艺

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Tolerance of Sugarcane Germplasm to Sugarcane Thrips

LUO Zhiming(), QIN Wei, YIN Jiong, LI Yinhu, ZHANG Rongyue, LI Jun   

  1. Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan, Yunnan 661699
  • Received:2021-11-08 Revised:2022-09-29 Online:2022-12-05 Published:2022-11-25

Abstract:

The tolerance of 12 sugarcane germplasms to sugarcane thrips was evaluated by natural population inoculation method. The results showed that there were great differences in the pest levels of different sugarcane germplasms. Among them, ‘Yunzhe 15-507’ had the least damage (pest index was 13.33%), and ‘Yunzhe 14-1010’ had the most serious damage (pest index was 73.33%). The results of correlation analysis showed that the correlation between pest index and leaf rolling rate was the strongest (R=0.9758), and the number of thrips adults was weakly correlated with pest index and leaf rolling rate. The 12 sugarcane germplasms could be divided into four pest tolerance grades from strong to weak, of which the first grade included ‘Yunzhe 135-507’, ‘Yunzhe 15-1679’ and ‘Yunzhe 14-1289’, the second grade included ‘Yunzhe 11-3898’ and ‘Yunzhe 14-1215’, the third grade included ‘Yunzhe 14-1208’, ‘Yunzhe 15-1629’, ‘Yunzhe 13-1821’ and ‘Yunzhe 12-1185’, and the fourth grade included ‘Yuetang 93-159’, ‘Yunzhe 13-1182’ and ‘Yunzhe 14-1010’. The analysis of the physiological and biochemical indexes related to the tolerance of sugarcane germplasms to insect pests showed that the pest index had a significantly negative correlation with polyphenol oxidase (PPO) activity and superoxide dismutase (SOD) activity, a weakly positive correlation with catalase (CAT) activity, and no correlation with phenylalanine ammonialyase (PAL) activity, peroxidase (POD) activity and malondialdehyde (MDA) content.

Key words: sugarcane germplasm, sugarcane thrips, pest index, pest tolerance, physiological and biochemical indexes

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