Evaluation of agronnomic characters of new sugarcane varieties(lines) based on factor analysis and cluster analysis

【Objective】The agronomic traits of new sugarcane varieties(lines) from 2015-2017 years in Longzhou(Chongzuo, Guangxi) of Guangxi regional trial of sugarcane varieties were evaluated, in order to provide reference for selection and promotion of fine sugarcane varieties(lines) in Longzhou.【Method】Using ROC22 as the control, 12 sugarcane varieties(lines) were subjected to one-year new planting and two-year ratooning trials in the field, and agronomic traits such as plant height, stem diameter, effective stem number and sucrose content were comprehensively evaluated using factor analysis and cluster analysis.【Result】Results showed that the top three comprehensive scores of factor analysis were Guitang 08-6, Guitang 08-120 and Guire 2, with comprehensive scores of 0.801, 0.717 and 0.549 respectively.The lowest in comprehensive scores were Guitang 07-1062, Liutang 08-98 and Guitang 07-108, with comprehensive scores of-0.828,-0.519 and-0.270 respectively.The 12 test materials were grouped into five categories when the euclidean distance was 15.Guitang 08-120 in category I had high sucrose content, Guitang 08-6 in category IV had the high germination rate, plant growth rate, tillering rate and effective stem number, and average sucrose content.Guire 2 in category V had high germination rate, plant growth rate and plant height, low tillering rate and sucrose content, medium effective stem, and the comprehensive performance was fine.【Conclusion】Guitang 08-6 has high germination rate, plant growth rate and strong tillering power, and Guitang 08-120 has high sucrose content and high comprehensive score, both can be planted in Chongzuo sugarcane area of Guangxi, especially in Longzhou sugarcane area.