Disparities in Genetic Diversity Drive the Population Displacement of Two Invasive Cryptic Species of the Bemisia tabaci Complex in China.

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  • Additional Information
    • Source:
      Publisher: MDPI Country of Publication: Switzerland NLM ID: 101092791 Publication Model: Electronic Cited Medium: Internet ISSN: 1422-0067 (Electronic) Linking ISSN: 14220067 NLM ISO Abbreviation: Int J Mol Sci Subsets: MEDLINE
    • Publication Information:
      Original Publication: Basel, Switzerland : MDPI, [2000-
    • Subject Terms:
      Hemiptera*/genetics ; Hemiptera*/classification ; Genetic Variation* ; Introduced Species* ; Microsatellite Repeats*/genetics ; Haplotypes*; Animals ; China ; Genetics, Population ; DNA, Mitochondrial/genetics ; Phylogeny
    • Abstract:
      Within the whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) complex, two cryptic species, namely Middle East-Asia Minor 1 (MEAM1) and Mediterranean (MED), are important invasive pests affecting global agriculture and horticulture. They were introduced into China sequentially in the mid-1990s and around 2003, respectively. Subsequently, the latter invader MED has outcompeted the earlier invader MEAM1, becoming the dominant population in the field. Although extensive studies have explored the underlying mechanisms driving this shift, the contribution of population genetics remains notably underexplored. In this study, we analyzed the genetic diversity and structure of 22 MED and 8 MEAM1 populations from various regions of China using mitochondrial DNA sequencing and microsatellite genotyping. Our results indicate low and moderate levels of genetic differentiation among geographically separate populations of MED and MEAM1, respectively. Median-joining network analysis of mtCOI gene haplotypes revealed no clear geographic structuring for either, with common haplotypes observed across provinces, although MED had more haplotypes. Comparative analyses revealed that MED presented greater genetic diversity than MEAM1 on the basis of two markers. Furthermore, analysis of molecular variance supported these findings, suggesting that while some genetic variation exists between populations, a significant amount is also present within populations. These findings reveal the population genetics of the two invasive cryptic species of the B. tabaci complex in China and suggest that the disparities in genetic diversity drive the displacement of their populations in the field. This work also provides valuable information on the genetic factors influencing the population dynamics and dominance of these invasive whitefly species.
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    • Grant Information:
      2021YFD1400200 National Key R & D Project of China
    • Contributed Indexing:
      Keywords: genetic diversity; invasive alien pests; microsatellites; mitochondrial DNA; population structure
    • Accession Number:
      0 (DNA, Mitochondrial)
    • Publication Date:
      Date Created: 20240727 Date Completed: 20240728 Latest Revision: 20240729
    • Publication Date:
      20240729
    • Accession Number:
      PMC11277096
    • Accession Number:
      10.3390/ijms25147966
    • Accession Number:
      39063207