Flowering Habit and Heritability for GT Sugarcane Parents
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (1): 11-17.DOI: 10.3969/j.issn.1000-2561.2019.01.002

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Flowering Habit and Heritability for GT Sugarcane Parents

LEI Jingchao1,ZHOU Hui1,YANG Rongzhong1,GAO Lihua1,LI Xiang1,HUANG Hairong1,DUAN Weixing1,JING Yan1,WANG Lunwang1,ZHANG Gemin1,WU Yang2,GAO Yijing1,*()   

  1. 1. Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences / Guangxi Key Laboratory of Sugarcane Genetic Improvement / Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs, Nanning, Guangxi 530007, China
    2. Department of Biotechnology, Fujian Vocational College of Agriculture, Fuzhou, Fujian 350007, China;
  • Received:2018-08-27 Revised:2018-10-31 Online:2019-01-15 Published:2019-01-15
  • Contact: GAO Yijing


In order to clarify the flowering habits for GT sugarcane parents, the initial flowering time, heading rate and pollen dyeing rate for 25 GT parents were investigated and analyzed among 2011?2018 crossing seasons at Hainan Sugarcane Crossing Station of Sugarcane Research Center, Chinese Academy of Agricultural Sciences. The results showed that broad-sense heritability of the initial flowering time, the heading rate and the pollen dyeing rate were 0.9502, 0.9631 and 0.9236, respectively, indicating that the three characters were of high heritability. The parent with the earliest first flowering time was GT28 and the parent with the latest first flowering time was GT11. Twenty-five parents had the earliest flowering time in 2011/2012 crossing season and the latest one in 2017/2018 crossing season. The parents with small heading rate were GT11, GT21, GT32, GT43 and GT47, belonging to difficult flowering parents, and the rest 20 parents were easy flowering parents. The parents with low pollen dyeing rates were GT24, GT34, GT45 and GT48, and the parents with high pollen dyeing rates were GT28, GT41 and GT44. These results would provide a useful reference for the crossing of GT sugarcane parents.

Key words: GT, sugarcane parents, flowering habit, heritability