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The geographic variability of Harmonia axyridis Pall. has been studied with regard to three morphological features. A study of the cytochrome C oxidase subunit I (COI) polymorphism was begun. Two geographically separated zones inside the Russian part of the geographic range of the species are recognized. Interpopulational differences, as judged using… (More)
The distribution and variability of reproductive symbiotic Wolbachia pipientis bacteria were studied in seven native and six invasive H. axyridis populations. Wolbachia-infected individuals were found in two invasive and two native populations. We demonstrated for the first time an infection of invasive H. axyridis populations with Wolbachia. Two new… (More)
Intra- and interpopulation variation of occurrence of elytral ridge (neutral morphological character with the known genetic determination) in some populations of Harmonia axyridis from the Russian part of the species area was studied for the first time. Comparative analysis of the frequencies of the recessive allele r of a corresponding gene and the… (More)
Harmonia axyridis Pallas (1773) (Coleoptera: Coccinellidae) is the well-studied system of invasive insect species. Native and invasive parts of the area of H. axyridis are isolated geographically. We studied the species composition and the distribution of bacterial symbionts Spiroplasma and Rickettsia in seven localities of the native area and six… (More)
The initial distribution and the global invasion of the ladybird H. axyridis are discussed. Some biological characteristics of the species are considered in view of its possible impact on the formation of evolutionary preadaptations promoting invasion.
The population genetic structure, possible causes, sources, and routes of global invasion of the ladybird Harmonia axyridis are discussed. Infection with the reproductive endosymbionts is considered in the light of possible influence on the formation of evolutionary preadaptations that contributed to the invasion.