Genetic distinctions among the Mediterranean and Chinese populations of Bemisia tabaci Q biotype and their endosymbiont Wolbachia populations
Genetic distinctions among the Mediterranean and Chinese populations of Bemisia tabaci Q biotype and their endosymbiont Wolbachia populations
复制标题
地中海和中国烟粉虱Q生物型群体及其内共生沃尔巴克氏体群体的遗传差异
DOI：
10.1111/j.1439-0418.2009.01442.x
复制
发表时间：
2009-12-01
影响因子：
1.9
通讯作者：
Qiu, B. -L.
中科院分区：
文献类型：
--
作者：
Ahmed, M. Z.;Shatters, R. G.;Qiu, B. -L.
甘薯粉虱是一种神秘的物种复合体，由世界上24种不同的生物型组成。Q型烟粉虱被认为起源于地中海盆地，现在是一种广泛而严重的农业害虫。本研究调查了来自地中海国家和中国的Q生物型群体的遗传差异。根据它们的mt COI基因序列，Q生物型种群可分为两组，分别被标记为地中海盆地1号和地中海盆地2号。其中，地中海盆地1是地中海西部的本土种群，而地中海东部是地中海东部的本土种群。中盆1群体的遗传变异大于中盆2群体。与美国引进的既有Medbasin1种群又有Medbasin2种群不同，中国地区的所有Q型烟粉虱种群都属于Medbasin1号。中国、埃及和叙利亚的8个代表性Q型种群的沃尔巴克氏菌检测表明，所有种群都有沃尔巴克氏菌感染，中国种群的感染率(42.5%)与埃及和叙利亚的感染率(51.4%)没有显著差异。系统发育分析表明，沃尔巴克氏菌种群的进化与其寄主烟粉虱的进化没有紧密的联系。
The sweetpotato whitefly, Bemisia tabaci, is a cryptic species complex composed of more than 24 different biotypes around the world. The Q biotype of B. tabaci, which is thought to have originated in the Mediterranean Basin, is now a widespread and serious agricultural pest. In this study, the genetic differences among Q biotype populations from Mediterranean countries and China were investigated. Based on their mt COI gene sequences, the Q biotype populations could be divided into two groups, which were labelled as MedBasin 1 and MedBasin 2. MedBasin 1 is indigenous to the western Mediterranean area while MedBasin 2 is indigenous to the eastern Mediterranean area. Genetic variation was greater in the MedBasin 1 populations than in the MedBasin 2 populations. Unlike the introductions into the USA, which involved both Medbasin1 and MedBasin2 populations, all B. tabaci Q biotype populations in China belonged to MedBasin 1. Wolbachia detection in eight representative Q biotype populations from China, Egypt and Syria indicated that all of the populations were infested with Wolbachia, and the infection rate of the Chinese populations (42.5%) were not significantly different from that of Egypt and Syria (51.4%). Phylogenetic analysis indicated that the evolution of the Wolbachia populations was not closely linked with the evolution of their B. tabaci hosts.