引进甘蔗品种黑穗病抗性鉴定及结果分析

Analysis of Results from Smut Resistant Identification in Sugarcane Varieties Introduced

为了探明新引进甘蔗品种对黑穗病的抗性水平,为甘蔗抗黑穗病育种提供材料,以采自广东省甘蔗主产区湛江的甘蔗黑粉菌混合冬孢子作为接种源,采用浸渍接种法,对17个引进品种进行一造新植一造宿根黑穗病抗性鉴定,鉴定结果表明抗性水平为抗(R)的品种有Q200B、Q124、Q171、Q190、Q138、Q208、Q151、Q96,占参试品种的47.1%;抗性水平为中抗(MR)的品种有Q135、Q170、Q182、Q183,占参试品种的23.5%;抗性水平为感病(S)的品种有Q155,占参试品种的5.9%;抗性水平为高感(HS)的品种有Q157、Q200A、Q117、Q120,占参试品种的23.5%;没有抗性水平达高抗(HR)的品种。此外,还初步推断出广东省湛江蔗区应该存在3个或3个以上甘蔗黑粉菌生理小种。

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 had 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, the author initially concluded that there were 3 or more races of Ustilago scitaminea Sydow in cane area of Zhanjiang, Guangdong Province, China.