Population structure of the melon fly, Bactrocera cucurbitae, in Reunion Island

Jacquard Cathy, Virgilio Massimiliano, David Patrice, Quilici Serge, De Meyer Marc, Delatte Hélène. 2013. Population structure of the melon fly, Bactrocera cucurbitae, in Reunion Island. Biological Invasions, 15 (4) : 759-773.

Quartile : Q1, Sujet : BIODIVERSITY CONSERVATION / Quartile : Q2, Sujet : ECOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : The melon fly, Bactrocera cucurbitae (Coquillett) (Diptera: Tephritidae) is an agricultural pest of major significance worldwide that primarily attacks cucurbit crops. In Reunion Island, it represents the main tephritid pest on cucurbits. In this paper, we provide a genetic characterization of populations of B. cucurbitae from Reunion Island and investigate their geographical origin using ten microsatellite loci at two mitochondrial gene fragments. Microsatellites reveal the occurrence of three different genetic clusters of B. cucurbitae in Reunion Island, all clearly distinguishable from their African and Asian relatives. These three clusters are sympatric and show no signs of recent bottlenecks. Levels of gene flow among clusters are relatively high, yet gene flow also occurs with populations from the African continent and, to a lesser extent, from Asia. The B. cucurbitae clusters show distinct distributions across eastern and western locations in Reunion Island (but not at different altitudes or between wild and cultivated host plants or between sampling periods), and their abundance is also correlated with the average amount of rainfall. Microsatellite and sequence analyses suggest Africa as the most probable source area for populations of B. cucurbitae in Reunion Island.

Mots-clés Agrovoc : Bactrocera cucurbitae, Cucumis melo, provenance, flux de gènes, microsatellite, génétique des populations, génétique mitochondriale

Mots-clés géographiques Agrovoc : La Réunion, Afrique, Asie, Maurice, Seychelles, Hawaï, France

Mots-clés complémentaires : Origine géographique

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Jacquard Cathy, Université de la Réunion (REU)
• Virgilio Massimiliano, Musée royal de l'Afrique centrale (BEL)
• David Patrice, CEFE (FRA)
• Quilici Serge, CIRAD-BIOS-UMR PVBMT (REU)
• De Meyer Marc, Musée royal de l'Afrique centrale (BEL)
• Delatte Hélène, CIRAD-BIOS-UMR PVBMT (REU)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/568947/)

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