Mitochondrial DNA and trade data support multiple origins of Helicoverpa armigera (Lepidoptera, Noctuidae) in Brazil.

Wee Tek Tay; Thomas K Walsh; Sharon Downes; Craig Anderson; Lars S Jermiin; Thomas K F Wong; Melissa C Piper; Ester Silva Chang; Isabella Barony Macedo; Cecilia Czepak; Gajanan T Behere; Pierre Silvie; Miguel F Soria; Marie Frayssinet; Karl H J Gordon

doi:10.1038/srep45302

Article dans une revue

Mitochondrial DNA and trade data support multiple origins of Helicoverpa armigera (Lepidoptera, Noctuidae) in Brazil.

Wee Tek Tay ¹ Thomas K Walsh ¹ Sharon Downes ² Craig Anderson ^{1, 3} Lars S Jermiin ^{1, 4} Thomas K F Wong ^{1, 4} Melissa C Piper ¹ Ester Silva Chang ^{1, 5} Isabella Barony Macedo ^{1, 6} Cecilia Czepak ⁷ Gajanan T Behere ⁸ Pierre Silvie ^{9, 10} Miguel F Soria ¹¹ Marie Frayssinet ¹² Karl H J Gordon ¹

1 Black Mountain Laboratories

2 Myall Vale Laboratories

3 Biological and Environmental Sciences

4 Research School of Biology

5 Instituto de Biociências

6 Faculdade de Farmácia

7 Escola de Agronomia

8 Indian Council of Agricultural Research

9 EGCE - Évolution, génomes, comportement et écologie

10 UPR AIDA - Agroécologie et Intensification Durables des cultures annuelles

11 Crop Science Division

12 DGIMI - Diversité, Génomes & Interactions Microorganismes - Insectes [Montpellier]

Abstract : The Old World bollworm Helicoverpa armigera is now established in Brazil but efforts to identify incursion origin(s) and pathway(s) have met with limited success due to the patchiness of available data. Using international agricultural/horticultural commodity trade data and mitochondrial DNA (mtDNA) cytochrome oxidase I (COI) and cytochrome b (Cyt b) gene markers, we inferred the origins and incursion pathways into Brazil. We detected 20 mtDNA haplotypes from six Brazilian states, eight of which were new to our 97 global COI-Cyt b haplotype database. Direct sequence matches indicated five Brazilian haplotypes had Asian, African, and European origins. We identified 45 parsimoniously informative sites and multiple substitutions per site within the concatenated (945 bp) nucleotide dataset, implying that probabilistic phylogenetic analysis methods are needed. High diversity and signatures of uniquely shared haplotypes with diverse localities combined with the trade data suggested multiple incursions and introduction origins in Brazil. Increasing agricultural/horticultural trade activities between the Old and New Worlds represents a significant biosecurity risk factor. Identifying pest origins will enable resistance profiling that reflects countries of origin to be included when developing a resistance management strategy, while identifying incursion pathways will improve biosecurity protocols and risk analysis at biosecurity hotspots including national ports.

Mots-clés : biosécurité brésil analyse phylogénétique base de séquences cytochrome

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Article dans une revue

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Sciences de l'environnement / Biodiversité et Ecologie

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Soumis le : mardi 26 septembre 2017 - 21:46:46
Dernière modification le : mercredi 3 février 2021 - 10:26:54

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