烟粉虱复合种不同地理种群的遗传分化

烟粉虱Bemisia tabaci(Gennadius) 是由具有遗传分化的不同地理种群组成的复合种。本文介绍了烟粉虱不同地理种群遗传分化的最新研究进展，并在世界各国对烟粉虱核糖体ITS1(rDNA ITS1)、线粒体COI（mtDNA COI）基因大量测序的基础上，进一步分析了烟粉虱不同地理种群的遗传分化。根据mtDNA COI和rDNA ITS1基因序列分析的结果，烟粉虱不同地理种群可分为5组，即亚洲组（Asia group）、美洲组（America group）、非洲组（Africa group）、澳洲组(Australia group)、B型/地中海/中东/北非/Ms型组(Biotype B/Mediterranean/Middle Eastern/Northern Africa/Biotype Ms group)；此外，还包括3个没有特定组的种群，即乌干达（Uganda）、科特迪瓦（Ivory Coast和台湾（Taiwan）种群。地理隔离可能是造成烟粉虱不同地理种群遗传分化的最重要驱动力。许多具有入侵性或生物学优势的烟粉虱种群随着人类活动而传入新的地区，造成了严重的经济损失。有必要加强烟粉虱生物型的监测，遏制已入侵烟粉虱种群的蔓延，防止新的具有潜在危险性的烟粉虱种群传入中国。

Genetic Differentiation of Different Geographical Populations of Bemisia tabaci (Gennadius) Complex

Bemisia tabaci(Gennadius) is a species complex which includes different geographical populations with genetic differentiation.The recent progress on the genetic differentiation of various geographical populations of B.tabaci complex has been introduced.The genetic differentiation has been further analyzed based on the sequences of mtDNA COI and rDNA ITS1 recorded in the world's GenBank.Five groups are defined based on mtDNA COI and rDNA ITS1,including the Asia group,America group,Africa group,Australia group and Biotype B/Mediterranean/Middle Eastern/Northern Africa/Biotype Ms group.There are several ungrouped geographical classifications,such as the Uganda population,Ivory Coast population and Taiwan population.Geographical isolation may be the most important factor that contributed to the genetic differentiation of various geographical populations of B.tabaci.Many populations with biological advantages invaded new regions and caused severe economic losses within human activity.It is necessary to strengthen the research of B.tabaci biotype to prevent the spread of invaded populations and the invasion of potentially dangerous populations.