Genetic diversity and population structure in Bactrocera correcta (Diptera: Tephritidae) inferred from mtDNA cox1 and microsatellite markers

Abstract

Bactrocera correcta is one of the most destructive pests of horticultural crops in tropical and subtropical regions. Despite the economic risk, the population genetics of this pest have remained relatively unexplored. This study explores population genetic structure and contemporary gene flow in B. correcta in Chinese Yunnan Province and attempts to place observed patterns within the broader geographical context of the species’ total range. Based on combined data from mtDNA cox1 sequences and 12 microsatellite loci obtained from 793 individuals located in 7 countries, overall genetic structuring was low. The expansion history of this species, including likely human-mediated dispersal, may have played a role in shaping the observed weak structure. The study suggested a close relationship between Yunnan Province and adjacent countries, with evidence for Western and/or Southern Yunnan as the invasive origin of B. correcta within Yunnan Province. The information gleaned from this analysis of gene flow and population structure has broad implications for quarantine, trade and management of this pest, especially in China where it is expanding northward. Future studies should concentrate effort on sampling South Asian populations, which would enable better inferences of the ancestral location of B. correcta and its invasion history into and throughout Asia.

Population genetic structure and intraspecific genetic distance of Periplaneta americana (Blattodea: Blattidae) based on mitochondrial and nuclear DNA markers

“…A number of successful applications of COI in phylogeographic studies have been reported (Inoue et al, ; Prijović et al, ; Qin et al, ). Haplotypes of the USA group were divided into three branches A, B, and D, while the Chinese group was divided into B, C, and D clades (Figure a).…”

Microsatellite evidence of dispersal mechanism of red swamp crayfish (Procambarus clarkii) in the Pearl River basin and implications for its management

“…A genetic approach to the management of invasive species is gathering momentum. The information gleaned from this analysis of gene flow and population structure has broad implications for quarantine, trade and management of Bactrocera correcta 7 , Bemisia tabaci biotype B 8 , and Vulpes vulpes 9 . Coupled with ecological information on dispersal and/or colonization mechanisms and life-history characteristics, population genetics analyses provide a strong basis to formulate management strategies 10 .…”

In the footsteps of Wallace: population structure in the breadfruit fruit fly, Bactrocera umbrosa (F.) (Diptera: Tephritidae), suggests disjunction across the Indo‐Australian Archipelago

“…Aketarawong et al 2007;Virgilio et al 2010a;Schutze et al 2012b;Qin et al 2016). Numerous studies of other tephritids have demonstrated general panmixia across other biogeographical barriers in the region (e.g.…”

“…Numerous studies of other tephritids have demonstrated general panmixia across other biogeographical barriers in the region (e.g. Aketarawong et al 2007;Virgilio et al 2010a;Schutze et al 2012b;Qin et al 2016). The majority of these studies focused on highly polyphagous pest species (e.g.…”

“…One factor in driving the difference in population structure between species with different host ranges is likely that the narrower the host range, the stronger the limitation on effective dispersal and gene flow. This appears to characterise patterns in tephritids globally: polyphagous species often show little population structure (Yu et al 2001;Baliraine et al 2004;Shi et al 2012;Qin et al 2016), whereas mono-and oligophagous species show significant structure, especially at a broad geographical scale (Augustinos et al 2005;Virgilio et al 2010a;Boontop et al 2017). In the case of B. umbrosa, however, not only is the species' host range quite narrow, but individual host plant species distributions are also geographically segregated.…”