Abstract:

In order to prove the level of smut resistance of new sugarcane varieties introduced and provide materials for sugarcane breeding of smut resistance, using mixed spores of Ustilago scitaminea Sydow from Zhanjiang, Guangdong Province, a main sugarcane-producing area, as the inoculum, by dipping inoculation method, smut resistance identification has been carried out in the 17 sugarcane varieties introduced through a new plant and a ratoon field experiments, the results showed that Q200B, Q124, Q171, Q190, Q138, Q208, Q151 and Q96 were resistant to smut, accounting for 47.1%; Q135, Q170, Q182 and Q183 were moderately resistant to smut, accounting for 23.5%; Q155 was susceptible to smut, accounting for 5.9%; Q157, Q200A, Q117 and Q120 were highly susceptible to smut, accounting for 23.5%; no varieties with resistance level of high resistance. In addition, we initially concluded that there were 3 or more races of Ustilago scitaminea Sydow in cane area of Zhanjiang, Guangdong Province, China.