Mitochondrial, nuclear, and endosymbiotic diversity of two recently introduced populations of the invasive Bemisia tabaci MED species in La Réunion. Issue 1 (23rd June 2014)

• Record Type: Journal Article
• Authors: Thierry, Magali; Bile, Audrey; Grondin, Martial; Reynaud, Bernard; Becker, Nathalie; Delatte, Hélène; Schonrogge, Karsten; Nash, David
• Is Part Of: Insect conservation and diversity. Volume 8:Issue 1(2015)
• Page Start: 71
• Page End: 80
• Publication Date: 2014-06-23
• Subjects: Entomology -- Periodicals; Insects -- Conservation -- Periodicals; Biodiversity -- Periodicals; Insects -- Ecology -- Periodicals; Electronic journals; 333.955716
• DOI: 10.1111/icad.12083
• Languages: English
• ISSNs: 1752-458X

Abstract

<abstract abstract-type="main" id="icad12083-abs-0001"> <title>Abstract</title> <p> <list id="icad12083-list-0001" list-type="order"> <list-item> <p>The whitefly <italic>Bemisia tabaci</italic> is a worldwide pest considered to be a complex of cryptic species. Its identification is primarily based on mitochondrial <italic>COI</italic> sequences. Microsatellite markers can also be used to identify this species and to study its population structure. Moreover, <italic>B. tabaci</italic> species harbour quite specific endosymbiont communities that can constitute additional markers for identification. Previous studies have demonstrated the occurrence of two <italic>B. tabaci</italic> species on the island of La Réunion: the exotic MEAM1 and the indigenous IO. A recent field survey revealed unusually high densities of whiteflies in Saint Pierre, and this could reflect the introduction of a new <italic>B. tabaci</italic> species.</p> </list-item> <list-item> <p>To test the putative introduction of a new invasive species, <italic>B. tabaci</italic> individuals were collected at Saint Pierre and at six additional sites. Among these samples, analyses were conducted on mitochondrial <italic>COI</italic>, microsatellites, and endosymbiont communities.</p> </list-item> <list-item> <p>Based on the mitochondrial <italic>COI</italic> marker, we detected in Saint Pierre two subgroups (Eastern and Western) characteristic of the invasive MED species. This is the first time these subgroups have been found in La Réunion. The analysis of microsatellite data from the seven sites around the island showed that (i) the geographical distribution of MED seems confined to Saint Pierre, (ii) no hybrids were detected between MED individuals and the resident species, and (iii) the MED population, while exhibiting two mitochondrial haplotypes, has a homogenous nuclear genetic background. The two MED subgroups differing in their mitochondrial haplotype also specifically differed in their endosymbiotic diversity.</p> </list-item> </list> </p> </abstract>