Mitochondrial DNA revealed the extent of genetic diversity and invasion origin of populations from two separate invaded areas of a newly invasive pest,Cydia pomonella(L.) (Lepidoptera: Tortricidae) in China

Abstract

Cydia pomonella is a serious invasive insect pest in China, and has caused severe damage to the production of apple and pear in its invaded areas. This species is distributing in the northwest and northeast of China, but no occurrence of it has been recorded in the large areas (about 3000-5000 km away) between the invaded northwestern and northeastern regions despite continuous monitoring. As yet the genetic diversity and invasion origin of the C. pomonella populations in Northwestern and Northeastern China is obscure. In this study, we investigate the genetic diversity of 14 populations of C. pomonella sampled throughout the main distribution regions in Northwestern (Xinjiang and Gansu Provinces) and Northeastern (Heilongjiang Province) China and compared them with nine populations from Europe and other continents using the mitochondrial COI, COII and Cytb genes. Both the populations from Northeastern and Northwestern China shared some haplotypes with populations from other countries. Haplotypes of the three mitochondrial genes had a different distribution in Northeastern and Northwestern China. The northeastern populations had more private haplotypes than the northwestern populations. A large number of the individuals from northwestern populations shared a few haplotypes of each of the three genes. The haplotype numbers and haplotype diversities of the northeastern populations were similar to those of field populations in other countries, but were higher than those of the northwestern populations. Populations from the Northwestern China showed similar haplotype number and haplotype diversity. We conclude that the population genetic background of C. pomonella populations in Northeastern and Northwestern China varies due to different invasion sources and that this should be considered before the application of new pest control tactics.

DNA barcodes for bio-surveillance: regulated and economically important arthropod plant pests

“…Cryptic species have important implications for taxonomic, evolutionary, and biodiversity studies, but their presence in pest taxa also has economic and regulatory implications (Piffaretti et al 2013;Rebijith et al 2014). Several studies have considered the impact of cryptic species on pest management (Frewin et al 2014;Ovalle et al 2014), biological control strategies (Derocles et al 2015), the detection of invasive species (Blacket et al 2015;Li et al 2015), and quarantine inspections (Kang et al 2015). The most obvious implications of DNA barcoding relate to its capacity to discriminate the members of cryptic species complexes (Robe et al 2013).…”

Genetic diversity of Diaphorina citri and its endosymbionts across east and south‐east Asia

“…Mitochondrial DNA is subject to strong genetic drift because of its maternal and haploid mode of inheritance . Genetically, it can be highly informative in the case of multiple sources of invasion, and mitochondrial genetic markers are often used to evaluate the geographic origin and colonisation history of introduced pests . Most recently, several researchers used mitochondrial COI (mt COI ) markers to analyse the genetic structure of the invasive pest, D. citri .…”

Population Genetic Structure of Codling Moth, Cydia pomonella (L.) (Lepidoptera: Tortricidae), in Different Localities and Host Plants in Chile

“…At present this coastal range is extensively covered by plantations of insigne pine (Pinus radiata D. Don) for the production of timber and paper [54], which might represent a barrier for the codling moth's adult flight dispersal. These managed monoculture forest plantations do not present conditions for the growth of codling moth host plants; therefore, they could produce a barrier to dispersal similar to mountain areas described for Europe [10,23] or Iran [25] and desert areas for China [1,8,11,13].…”