Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (3): 816-821.DOI: 10.3969/j.issn.1000-2561.2021.03.029

• Plant Protection & Bio-safety • Previous Articles     Next Articles

Breeding of a New Sugarcane Variety ‘Zhongtang No. 2’ with High Resistance to Smut

GAN Yimei, WU Yuanli, YANG Benpeng*(), CAI Wenwei, ZENG Jun, PENG Lishun, CAO Zhengying   

  1. Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences / Sugarcane Research Center, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture & Rural Affairs, Haikou, Hainan 571101, China
  • Received:2020-05-31 Revised:2020-06-16 Online:2021-03-25 Published:2021-03-25
  • Contact: YANG Benpeng

Abstract:

This article elaborated on the selection process of the new sugarcane variety ‘Zhongtang No. 2’ with high resistance to smut, high yield and high sugar, and a comprehensive analysis of its cane stalk yield, smut identification, and characteristics. ‘Zhongtang No. 2’ is an excellent new sugarcane variety selected by the Institute of Tropical Biotechnology of the Chinese Academy of Tropical Agricultural Sciences from the progeny of the hybrid combination of ‘Reyin 1’ × ‘ROC22’. It was recognized by the Ministry of Agriculture and Rural Affairs in 2019. Registration of new varieties of main crops [(No. GPD Sugarcane (2018)460029)]. This variety shows neat and uniform buds, high resistance to smut, no susceptibility to stem borers, erect, easy to shed leaves, resistance to lodging, and is suitable for mechanization. The test results in Lingao, Hainan showed that the average sugarcane yield of ‘Zhongtang No.2’ (117 080 kg/hm2) was higher than that of the control ‘Xin Taitang 22’ (96 330 kg/hm2) the yield increased by 21.54%. The ‘Zhongtang No.2’ cane stem yield of ratoon sugarcane in the second year and the third year were 112 875 kg/hm2 and 110 625 kg/hm2, respectively, which were 27.82% and 34.73% higher than the control. The average sugar content of ‘Zhongtang No.2’ (14 756 kg/hm2) was 18.61% higher than that of the control. The sugar content of the second year and the third year ratoon sugarcane were 14 516 kg/hm2 and 13 874 kg/hm2, respectively, which increased the sugar by 25.29% and 29.17%, respectively. Years of investigation on the natural incidence of smut showed that ‘Zhongtang No.2’ was highly resistant, and the incidence of artificial inoculation of smut was also highly resistant. ‘Zhongtang No.2’ is a new high-yielding and high-sugar variety with high resistance to smut. It not only provides disease-resistant parent material for sugarcane breeding, but also provides disease-resistant production seeds for sugarcane production.

Key words: sugarcane, new varieties, defoliation, resistance to smut

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