Genetic diversity of Bemisia tabaci (Genn.) Populations in Brazil revealed by RAPD markers.

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dc.contributorLUZIA HELENA CORREA LIMA, CENARGEN; MARCIO DE CARVALHO MORETZSOHN, CENARGEN; DENISE NAVIA MAGALHAES FERREIRA, CENARGEN; MARIA REGINA VILARINHO DE OLIVEIRA, CENARGEN.
dc.creatorLIMA, L. H. C.
dc.creatorCAMPOS, L.
dc.creatorMORETZSOHN, M. de C.
dc.creatorFERREIRA, D. N. M.
dc.creatorOLIVEIRA, M. R. V. de
dc.date2026-03-12T20:55:03Z
dc.date2026-03-12T20:55:03Z
dc.date2026-03-12
dc.date2002
dc.date.accessioned2026-07-07T11:56:54Z
dc.descriptionBemisia tabaci (Genn.) was considered a secondary pest in Brazil until 1990, despite being an efficient geminivirus vector in beans and soybean. In 1991, a new biotype, known as B. tabaci B biotype (=B. argentifolii) was detected attacking weed plants and causing phytotoxic problems in Cucurbitaceae. Nowadays, B. tabaci is considered one of the most damaging whitefly pests in agricultural systems worldwide that transmits more than 60 different plant viruses. Little is known about the genetic variability of these populations in Brazil. Knowledge of the genetic variation within whitefly populations is necessary for their efficient control and management. The objectives of the present study were to use RAPD markers (1) to estimate the genetic diversity of B. tabaci populations, (2) to study the genetic relationships among B. tabaci biotypes and two other whitefly species and (3) to discriminate between B. tabaci biotypes. A sample of 109 B. tabaci female individuals obtained from 12 populations in Brazil were analyzed and compared to the A biotype from Arizona (USA) and B biotype from California (USA) and Paraguay. Trialeurodes vaporariorum and Aleurodicus cocois samples were also included. A total of 72 markers were generated by five RAPD primers and used in the analysis. All primers produced RAPD patterns that clearly distinguished the Bemisia biotypes and the two other whitefly species. Results also showed that populations of the B biotype have considerable genetic variability. An average Jaccard similarity of 0.73 was observed among the B biotype individuals analyzed. Cluster analysis demonstrated that, in general, Brazilian biotype B individuals are scattered independently in the localities where samples were collected. Nevertheless, some clusters were evident, joining individuals according to the host plants. AMOVA showed that most of the total genetic variation is found within populations (56.70%), but a significant portion of the variation is found between crops (22.73%). The present study showed that the B biotype is disseminated throughout the sampled areas, infesting several host plants and predominates over the A biotype.
dc.identifierGenetics and Molecular Biology, Ribeirão Preto, v. 25, n. 2, p. 217-223, jun. 2002.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1185370
dc.identifierhttps://doi.org/10.1590/S1415-47572002000200016
dc.identifier.urihttp://hdl.handle.net/123456789/518595
dc.languageeng
dc.rightsopenAccess
dc.subjectBemisia Tabaci
dc.subjectInseto
dc.subjectMarcador Molecular
dc.subjectPraga
dc.subjectMosca Branca
dc.subjectVariação Genética
dc.subjectPests
dc.subjectInsects
dc.subjectGenetic variation
dc.subjectRandom amplified polymorphic DNA technique
dc.titleGenetic diversity of Bemisia tabaci (Genn.) Populations in Brazil revealed by RAPD markers.
dc.typeArtigo de periódico

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