[Objective]To adapt to the needs of the development of the sugar industry,new sugarcane varieties with good ratooning ability,high yield and sugar content should be selected to safeguard the interests of sugarcane farmers and sugar enterprises,and provide variety support for the sustainable development of the sugar industry in Yunnan and China.[Methods]Using'Guitang 96-167'as the female parent and'Yacheng 93-26'as the male parent,sugarcane hybridization was conducted.Through the"five stage"breeding program,the morphological characteristics and production traits of'Yunzhe 101666'were comprehensively investigated through regional trials.[Results]'Yunzhe 101666'has uniform stalk,compact and upright plant types,medium to medium large stalk,and good self-trashing;In the regional trial from 2017 to 2019,the sucrose content from November to March was 12.80％,14.97％,16.26％,17.09％,and 17.37％,respectively.The average sucrose content throughout the entire period reached 15.46％,which was 0.71 percentage points higher than that of'Xintaitng22';The average cane yield was 121.32 t/hm2,which was 22.50％higher than that of'Xintaitang22';The average sugar yield was 18.67 t/hm2,which was 29.20％higher than that of'Xintaitang22'.This variety was resistant to smut and stripe mosaic disease,but susceptible to sorghum mosaic disease.It was granted the right to a new plant variety in July 2020.[Conclusion]'Yunzhe 101666'is a mid to early maturing,high yield,and high sugar variety with strong drought tolerance,good ratooning and self-trashing.It is suitable for planting on dry slopes and terraces with medium or higher fertility at an altitude range of 900-1400 m in sugarcane production areas of Dehong,Banna,Lincang,and Funing in Yunnan.
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