Diversity of Bemisia tabaci genetic groups and their secondary endosymbionts in the Philippines
2018
Ogot, A.V. | Sandoval, R.F.C. | Latina, R.A. | Caoili, B.L.
Bemisia tabaci (Gennadius), or silver leaf whitely, is among the most notorious pests worldwide because of its wide host range and its ability to transmit numerous types of plant viruses. B. tabaci exhibits high genetic variability among populations but without obvious phenotypic differences. Several studies suggested the presence of 11-41 genetic groups of this species. Its management has been a challenge. Whiteflies have also been noted to harbour symbiotic prokaryotes, which greatly affect them by providing essential nutrition while others can be non-essential or even deleterious. To date, no such studies have been conducted in the Philippines nationally. Samples from 28 provinces have been identified using cytochrome c oxidase 1 which belong to six different genetic groups, namely: Asia 1 (47.49%), Australia (17.79%), Asia 2 6 (1.02%), Asia 2 10(2.66%), Asia 2 7 (0.08), and the invasive MEAM 1 (30.96%). To date, MEAM 1 has been found on 19 host plants. This particular species has also thrived in mixed populations with another invasive whitefly, Trileurodes vaporariorum Westwood, in plots of lettuce. Angel's trumpet, and Galinsoga parviflora Cav. in high-elevation sites with cooler temperature. PCR amplification using genus-specific 16S and 23S ribosomal DNA genes revealed five secondary endosymbionts, namely: Wolbachia (n=782, 62.66%), Hamiltonelta (332, 26.60%), Rickettsia (379, 30.37%), Arsenophonus (150, 12.02%), and Cadinuim (40, 3.205%). Although individuals from the same populations do not have the same mix of endosymbionts, Hamiltonella is apparently restricted to MEAM 1 while Arsenphorus was only present in the local Asian Aspects.
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Este registro bibliográfico ha sido proporcionado por University of the Philippines at Los Baños