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中国农学通报 ›› 2006, Vol. 22 ›› Issue (12): 413-413.

• 农学 农业基础科学 • 上一篇    下一篇

甘蔗宿根矮化病菌PCR检测及目的片段核苷酸序列分析

沈万宽,周国辉,邓海华,周凌云   

  • 出版日期:2006-12-05 发布日期:2006-12-05

Detection of Sugarcane Ratoon Stunting Disease Pathogen with Polymerase Chain Reaction (PCR) and Nucleotide Sequence Analysis

Shen Wankuan, Zhou Guohui, Deng Haihua, Zhou Linyun   

  • Online:2006-12-05 Published:2006-12-05

摘要: 根据甘蔗宿根矮化病(Ratoon Stunting Disease, RSD)病原细菌(Leifsonia xyli subsp. xyli,Lxx)16S-23S rDNA基因间隔区核苷酸序列设计的一对特异性引物,建立了甘蔗宿根矮化病PCR检测方法;同时对PCR扩增的目的片段核苷酸序列进行测定与分析。结果表明广东湛江蔗区RSD病菌16S-23S rDNA基因间隔区核苷酸序列与巴西、澳大利亚及美国路易斯安娜州RSD株系基因组相应区段核苷酸同一率接近100%,病菌高度的同源。而与近缘的木质部赖氏杆菌狗牙根变种(Leifsonia xyli subsp. Cynodontis,Lxc)和形态上相近的马铃薯环腐病菌(Clavibacter michiganensis subsp. Michiganensis)基因组相应区段核苷酸同一率较低,存在明显的分化。

关键词: 鲜食糯玉米, 鲜食糯玉米, 栽培方式, 鲜穗产量, 经济效益, 综合评价

Abstract: PCR technique was established for detection of Leifsonia xyli subsp. xyli(Lxx.), the causal agent of sugarcane ratoon stunting disease(RSD), with specific primers based on the intergenic transcribed spacer(ITS) region of 16S-23S ribosomal DNA of Lxx. By sequence comparison of intergenic transcribed spacer (ITS) region of 16S-23S rDNA, it was revealed that RSD pathogen was highly conversant. Lxx guangdong isolate shares almost 100% nucleotide identity with Brazil, Australia and USA isolates. However, Lxx ITS sequences share only low identity with related close(Leifsonia xyli subsp. Cynodontis,Lxc) and morphologic similar bacteria(Clavibacter michiganensis subsp.michiganensis).

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