Evaluation of natural resistance to smut in elite sugarcane varieties (lines)

Abstract

: Sugarcane smut is a systemic fungal disease that seriously affects the development of sugarcane industry in China. Different sugarcane varieties have various resistance to smut. Screening and planting resistant varieties are the most economical and effective measure to control smut disease. In order to determine the smut resistance of elite varieties (lines) bred in China in recent year and screen resistant varieties for application in production, the resistance of 100 Chinese elite sugarcane varieties (lines) were evaluated by artificial inoculation with the impregnation method in smut epidemic area Yuanjiang, Yunnan Province. The results revealed that 56 of the 100 elite varieties (lines) were highly resistant to moderately resistant, accounting for 56%, and 44 were moderately susceptible to highly susceptible 2, accounting for 44%. The results showed that current large-scale planted and promoted varieties (lines) Mintang 69-421, 22, 03-182, 03-1137, 42, Yuegan 26, Guitang 02-351, and Yunzhe 09-1601 were highly susceptible. And the sugarcane varieties (lines) bred in recent years, Funong 15, Funong and were highly resistant to smut disease. It was suggested that in the high incidence area of sugarcane smut in low altitude valley, efforts should be carried out to eliminate the elite varieties susceptible to the disease and popularize and apply the superior varieties resistant to the disease in order to achieve the rational distribution of varieties, control the outbreak and epidemic of sugarcane smut, and pro-vide guarantee for the high-quality development of sugarcane industry.