Bactrocera dorsalis in the Indian Ocean: A tale of two invasions

Autor: Pablo Deschepper, Sam Vanbergen, Yue Zhang, Zhihong Li, Issa Mze Hassani, Nausheen Azhaar Patel, Henriette Rasolofoarivao, Sandeep Singh, Suk Ling Wee, Marc De Meyer, Massimiliano Virgilio, Hélène Delatte
Přispěvatelé: Royal Museum for Central Africa [Tervuren] (RMCA), China Agricultural University (CAU), Institut National de la Recherche pour l'Agriculture, la Pêche et l'Environnement (INRAPE), Ministry of Agro Industry and Food Security, Partenaires INRAE, Centre National de Recherche Appliquée au Développement Rural (FOFIFA), Punjab Agricultural University (PAU), Universiti Kebangsaan Malaysia (UKM), Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), The authors acknowledge the Plant Protection Platform (3P, IBISA) where DNA extractions were conducted and David Nestel for providing us with samples of B. zonata. Funding for this research was provided by the EU-FF-IPM H2020 FF-IPM project (Grant ID: 818184), and the National Natural Science Foundation of China (Grant ID: 31972341). The computational resources (Stevin Supercomputer Infrastructure) and services used in this work were provided by the VSC (Flemish Supercomputer Center), funded by Ghent University, FWO, and the Flemish Government—department EWI.
Rok vydání: 2022
Předmět:
Zdroj: Evolutionary Applications
Evolutionary Applications, 2023, 16 (1), pp.48-61. ⟨10.1111/eva.13507⟩
ISSN: 1752-4571
1752-4563
DOI: 10.1111/eva.13507
Popis: International audience; An increasing number of invasive fruit fly pests are colonizing new grounds. With this study, we aimed to uncover the invasion pathways of the oriental fruit fly, Bactrocera dorsalis into the islands of the Indian Ocean. By using genome-wide SNP data and a multipronged approach consisting of PCA, ancestry analysis, phylogenetic inference, and kinship networks, we were able to resolve two independent invasion pathways. A western invasion pathway involved the stepping-stone migration of B. dorsalis from the east African coast into the Comoros, along Mayotte and into Madagascar with a decreasing genetic diversity. The Mascarene islands (Reunion and Mauritius), on the contrary, were colonized directly from Asia and formed a distinct cluster. The low nucleotide diversity suggests that only a few genotypes invaded the Mascarenes. The presence of many long runs of homozygosity (ROH) in the introduced populations is indicative of population bottlenecks, with evidence of a more severe bottleneck for populations along the western migration pathway than on the Mascarene islands. More strict phytosanitary regulations are recommended in order to prevent the further spread of B. dorsalis.
Databáze: OpenAIRE
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