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Background  Although discrepancy in the specific traits and ecological characteristics of  Bemisia tabaci  between species are partially attributed to the  B .  tabaci -associated bacteria, the factors that affect the diversity of  B .  tabaci -associated bacteria are not well-understood. We used the metagenomic approach to characterize the  B .  tabaci -associated bacterial community because the approach is an effective tool to identify the bacteria.    Methodology and Results  To investigate the effects of the host plant and a virus,  tomato yellow leaf curl virus  (TYLCV), on the bacterial communities of  B .  tabaci  sibling species B and Q, we analyzed the bacterial communities associated with whitefly B and Q collected from healthy cotton, healthy tomato, and TYLCV-infected tomato. The analysis used miseq-based sequencing of a variable region of the bacterial 16S rDNA gene. For the bacteria associated with  B .  tabaci , we found that the influence of the host plant species was greater than that of the whitefly cryptic species. With further analysis of host plants infected with the TYLCV, the virus had no significant effects on the  B .  tabaci -associated bacterial community.    Conclusions  The effects of different plant hosts and TYLCV-infection on the diversity of  B .  tabaci -associated bacterial communities were successfully analyzed in this study. To explain why  B .  tabaci  sibling species with different host ranges differ in performance, the analysis of the bacterial community may be essential to the explanation.

Effects of Host Plant Factors on the Bacterial Communities Associated with Two Whitefly Sibling Species