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        昆蟲學(xué)

        2015-11-01 01:34:22
        中國學(xué)術(shù)期刊文摘 2015年16期
        關(guān)鍵詞:昆蟲學(xué)出版物來源

        昆蟲學(xué)

        來源出版物:Insect Science,2015,22(3): 619-636

        封面介紹:The whitefly vector of viruses Bemisia tabaci is one of the major threats on cassava and vegetable crops in Africa. More than 28 species have been described in the complex of B. tabaci cryptic species; among them,two are invasive pests worldwide(MEAM1 and MED),bearing a large and species specific endosymbiont community. To date,this is the first time that MEAM1and MED were described in Senegal together with their prevalence and associated endosymbiont community on vegetable crops(see pages 386-398). Photo by Antoine Franck,CIRAD,UMR PVBMT.

        Species and endosymbiont diversity of Bemisia tabaci(Homoptera: Aleyrodidae)on vegetable crops in Senegal

        Delatte Hélène,Baudin Rémy,Becker Nathalie ,et al.

        Bemisia tabaci-transmitted geminiviruses are one of the major threats on cassava and vegetable crops in Africa. However,to date,few studies are available on the diversity of B. tabaci and their associated endosymbionts in Africa. More than 28 species have been described in the complex of B. tabaci cryptic species; among them,2 are invasive pests worldwide: MED and MEAM1. In order to assess the species diversity of B. tabaciin vegetable crops in Senegal,several samplings in different localities,hosts and seasons were collected and analyzed with nuclear(microsatellite)and mitochondrial(COI)markers. The bacterial endosymbiont community was also studied for each sample. Two species were detected: MED Q1 and MEAM1 B. Patterns of MED Q1(dominance on most of the samples and sites,highest nuclear and mitochondrial diversity and broader secondary endosymbiont community: Hamiltonella,Cardinium,Wolbachia and Rickettsia),point toward a predominant resident begomovirus vector group for MED Q1 on market gardening crops. Furthermore,the lower prevalence of the second species MEAM1 B,its lower nuclear and mitochondrial diversity and a narrower secondary endosymbiont community(Hamiltonella/Rickettsia),indicate that this genetic group is exotic and results from a recent invasion in this area.

        begomovirus vectors; endosymbionts diversity; MED and MEAM1 species; microsatellites; mtCOI phylogeny; whitefly

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