Assessing the diversity of whiteflies infesting cassava in Brazil.

Autor:	Xavier CAD; Dep. de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Nogueira AM; Dep. de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Bello VH; Dep. de Proteção Vegetal, Universidade Estadual Paulista, Botucatu, SP, Brazil., Watanabe LFM; Dep. de Proteção Vegetal, Universidade Estadual Paulista, Botucatu, SP, Brazil., Barbosa TMC; Dep. de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Alves Júnior M; Faculdade de Engenharia Agronômica, Universidade Federal do Pará, Altamira, PA, Brazil., Barbosa L; Instituto Federal do Sudeste de Minas Gerais, Rio Pomba, MG, Brazil., Beserra-Júnior JEA; Dep. de Fitotecnia, Universidade Federal do Piauí, Teresina, PI, Brazil., Boari A; Embrapa Amazônia Oriental, Belém, PA, Brazil., Calegario R; Dep. de Fitotecnia e Fitossanidade, Universidade Federal do Paraná, Curitiba, PR, Brazil., Gorayeb ES; Centro de Ciências Agroveterinárias, Universidade do Estado de Santa Catarina, Lages, SC, Brazil., Honorato Júnior J; Centro Multidisciplinar do Campus de Barra, Universidade Federal do Oeste da Bahia, Barra, BA, Brazil., Koch G; Dep. de Fitotecnia e Fitossanidade, Universidade Federal do Paraná, Curitiba, PR, Brazil., Lima GSA; Centro de Ciências Agrárias/Fitossanidade, Universidade Federal de Alagoas, Rio Largo, AL, Brazil., Lopes C; Instituto Federal do Sudeste de Minas Gerais, Rio Pomba, MG, Brazil., de Mello RN; Embrapa Arroz e Feijão, Santo Antonio de Goiás, GO, Brazil., Pantoja K; Embrapa Amazônia Oriental, Belém, PA, Brazil., Silva FN; Centro de Ciências Agroveterinárias, Universidade do Estado de Santa Catarina, Lages, SC, Brazil., Ramos Sobrinho R; Centro de Ciências Agrárias/Fitossanidade, Universidade Federal de Alagoas, Rio Largo, AL, Brazil., Santana EN; Instituto Capixaba de Pesquisa e Extensão Rural, Linhares, ES, Brazil., da Silva JWP; Faculdade de Engenharia Florestal, Universidade Federal do Pará, Altamira, PA, Brazil., Krause-Sakate R; Dep. de Proteção Vegetal, Universidade Estadual Paulista, Botucatu, SP, Brazil., Zerbini FM; Dep. de Fitopatologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
Jazyk:	angličtina
Zdroj:	PeerJ [PeerJ] 2021 Jul 15; Vol. 9, pp. e11741. Date of Electronic Publication: 2021 Jul 15 (Print Publication: 2021).
DOI:	10.7717/peerj.11741
Abstrakt:	Background: The necessity of a competent vector for transmission is a primary ecological factor driving the host range expansion of plant arthropod-borne viruses, with vectors playing an essential role in disease emergence. Cassava begomoviruses severely constrain cassava production in Africa. Curiously, begomoviruses have never been reported in cassava in South America, the center of origin for this crop. It has been hypothesized that the absence of a competent vector in cassava is the reason why begomoviruses have not emerged in South America. Methods: We performed a country-wide whitefly diversity study in cassava in Brazil. Adults and/or nymphs of whiteflies were collected from sixty-six cassava fields in the main agroecological zones of the country. A total of 1,385 individuals were genotyped based on mitochondrial cytochrome oxidase I sequences. Results: A high species richness was observed, with five previously described species and two putative new ones. The prevalent species were Tetraleurodes acaciae and Bemisia tuberculata , representing over 75% of the analyzed individuals. Although we detected, for the first time, the presence of Bemisia tabaci Middle East-Asia Minor 1 ( Bt MEAM1) colonizing cassava in Brazil, it was not prevalent. The species composition varied across regions, with fields in the Northeast region showing a higher diversity. These results expand our knowledge of whitefly diversity in cassava and support the hypothesis that begomovirus epidemics have not occurred in cassava in Brazil due to the absence of competent vector populations. However, they indicate an ongoing adaptation process of Bt MEAM1 to cassava, increasing the likelihood of begomovirus emergence in this crop. Competing Interests: The authors declare there are no competing interests. (©2021 Xavier et al.)
Databáze:	MEDLINE
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