【摘要】 利用mtDNACOⅠ基因片段作标记 ,采用序列分析的方法 ,从分子生态学的角度研究了近年来在我国暴发危害的烟粉虱Bemisiatabaci 5个种群 (北京一品红种群 ,广州甘蓝种群 ,西安一品红种群 ,北京西红柿种群和新疆吐鲁番棉花种群 )的生物型。在 5个种群的基因片段上 ,截取与Texas B型相应的 72 0bp的序列分析 ,结果表明所测序列中只有 2个碱基与Texas B型不同 ,序列相似性为 99 7% ;在西安一品红种群和新疆吐鲁番棉花种群的原序列中截取与Arizona B型序列相应的4 2 3bp片段 ,分析表明这两个种群与AZB3型属于同一个单倍型。因此 ,我国烟粉虱 5个实验种群的生物型与Texas B型和Arizona B型种群为同一生物型“B”。更多还原

【Abstract】 Mitochondrial cytochrome oxidase Ⅰ (mt COⅠ) (～830?bp) gene sequences were utilized as markers to identify biotypes of 5 populations of Bemisia tabaci in China. Of the 720 characters examined for COⅠ sequences, only 2 bases exhibited divergence and overall similarity was 99 7%. Examination of 423 characters in populations from Xian and Tulufan revealed that these two populations were of the same haplotype as AZB3. The results indicated that all 5 populations were of the B biotype.更多还原