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Subspecific taxonomy of the desert locust, Schistocerca gregaria (Orthoptera: Acrididae), based on molecular and morphological characters

Chapuis Marie Pierre, Bazelet Corinna S., Blondin Laurence, Foucart Antoine, Vitalis Renaud, Samways Michael J.. 2016. Subspecific taxonomy of the desert locust, Schistocerca gregaria (Orthoptera: Acrididae), based on molecular and morphological characters. Systematic Entomology, 41 (3) : pp. 516-530.

Journal article ; Article de revue à facteur d'impact
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Url - jeu de données : http://www.ncbi.nlm.nih.gov/nuccore/?term=KU251462

Quartile : Outlier, Sujet : ENTOMOLOGY / Quartile : Q1, Sujet : EVOLUTIONARY BIOLOGY

Additional Information : Jeux de données enregistrés dans la base GenBank du numéro d'accès KU25146 au KU251474.

Abstract : We evaluated the validity of the subspecific designation for Schistocerca gregaria gregaria (Forskål) and Schistocerca gregaria flaviventris (Burmeister), isolated in distinct regions along the north–south axis of Africa. Towards this goal, we assessed the variation of multiple morphological and molecular traits within species. We first used elliptic Fourier and landmark-based relative warps analyses to compare the size and shape of two internal and two external structures of male genitalia. We provide a discriminant function which classified the specimens with 100% accuracy and selected shape elements of the external structures only (cercus and epiproct). We also tested eight molecular markers, and because of either absence of variation or contamination by mitochondrial DNA (mtDNA)-like sequences, we used a clone-and-sequence analysis of the standard cytochrome c oxidase subunit I mitochondrial DNA barcode only. We differentiated 185 true mitochondrial sequences from 66 mitochondrial DNA-like sequences, most of which were from S. g. gregaria specimens. On the dataset of mitochondrial origin, we identified three characteristic point mutations that diagnosed the two allopatric subspecies with 94% accuracy. Minimum spanning network and parsimony tree analyses identified S. g. flaviventris as a monophyletic lineage distinct from the nominate subspecies. Accordingly, microsatellite data indicate rarely occurring admixture events only, showing that independent evolutionary history is the norm. (Résumé d'auteur)

Mots-clés Agrovoc : Schistocerca gregaria, Taxonomie, Anatomie animale, Biologie moléculaire, Microsatellite, Marqueur génétique, Génétique des populations, ADN mitochondrial, Mutation, Espèce, Identification, Flux de gènes, Conformation animale

Mots-clés géographiques Agrovoc : Afrique, Afrique du Sud

Mots-clés libres : Acrididae, Africa, Data, Genitalia, History, Microsatellite, Mitochondrial DNA, Mutation, Schistocerca gregaria, Schistocerca gregaria flaviventris, Species, Structure, Subspecific taxonomy, Tree, Morphology

Classification Agris : H10 - Pests of plants

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Chapuis Marie Pierre, CIRAD-BIOS-UMR CBGP (FRA)
  • Bazelet Corinna S., Stellenbosch University (ZAF)
  • Blondin Laurence, CIRAD-BIOS-UPR Bioagresseurs (FRA)
  • Foucart Antoine, CIRAD-BIOS-UMR CBGP (FRA)
  • Vitalis Renaud, INRA (FRA)
  • Samways Michael J., Stellenbosch University (ZAF)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/579970/)

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