Earlier than expected introductions of the Bemisia tabaci B mitotype in Brazil reveal an unprecedented, rapid invasion history.

During 1991, in Brazil, the presence of the exotic Bemisia tabaci B mitotype was re -ported in São Paulo state. However, the duration from the time of initial introduction to population upsurges is not known. To investigate whether the 1991 B mitotype outbreaks in Brazil originated in São Paulo or from migrating populations from neigh -boring introduction sites, country-wide field samples of B. tabaci archived from 1989-2005 collections were subjected to analysis of mitochondrial cytochrome oxidase I (mtCOI) and nuclear RNA- binding protein 15 (RP- 15) sequences. The results of mtCOI sequence analysis identified all B. tabaci as the NAFME 8 haplotype of the B mitotype. Phylogenetic analyses of RP- 15 sequences revealed that the B mitotype was likely a hybrid between a B type parent related to a haplotype Ethiopian endemism (NAFME1-3), and an unidentified parent from the North Africa- Middle East (NAF-ME) region. Results provide the first evidence that this widely invasive B mitotype has evolved from a previously undocumented hybridization event. Samples from Rio de Janeiro (1989) and Ceará state (1990), respectively, are the earliest known B mitotype records in Brazil. A simulated migration for the 1989 introduction predicted a dispersal rate of 200-500 km/year, indicating that the population was unlikely to have reached Ceará by 1990. Results implicated two independent introductions of the B mitotype in Brazil in 1989 and 1990, that together were predicted to have contributed to the complete invasion of Brazil in only 30 generations.

Bibliographic Details

Main Authors:	PAREDES-MONTERO, J. R., RIZENTAL, M., QUINTELA, E. D., ABREU, A. G. de, BROWN J. K.
Other Authors:	JORGE R. PAREDES-MONTERO, The University of Arizona, USA; MURIEL RIZENTAL, UFG; ELIANE DIAS QUINTELA, CNPAF; ALUANA GONCALVES DE ABREU, Cenargen; JUDITH K. BROWN, The University of Arizona, USA.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2022-05-18
Subjects:	Dispersal, Migration, Museum collections, Whitefly, Agroecologia, Ecossistema, Ecologia Vegetal, Bemisia Tabaci, Mosca Branca, Invasive species,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1143194 https://doi.org/10.1002/ece3.8557
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