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Cryptic speciation in the Triatoma sordida subcomplex (Hemiptera, Reduviidae) revealed by chromosomal markers.

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  • معلومة اضافية
    • المصدر:
      Publisher: BioMed Central Country of Publication: England NLM ID: 101462774 Publication Model: Electronic Cited Medium: Internet ISSN: 1756-3305 (Electronic) Linking ISSN: 17563305 NLM ISO Abbreviation: Parasit Vectors Subsets: MEDLINE
    • بيانات النشر:
      Original Publication: London : BioMed Central
    • الموضوع:
      Chromosomes, Insect/*genetics ; Insect Vectors/*genetics ; Triatoma/*genetics; Animals ; Electron Transport Complex IV/genetics ; Genetic Markers ; In Situ Hybridization, Fluorescence ; Insect Proteins/genetics ; Insect Vectors/classification ; Molecular Sequence Data ; Phylogeny ; Triatoma/classification
    • نبذة مختصرة :
      Background: Chagas disease vectors (Hemiptera-Reduviidae) comprise more than 140 blood-sucking insect species of the Triatominae subfamily. The largest genus is Triatoma, subdivided in several complexes and subcomplexes according to morphology, ecology and genetic features. One of them is the sordida subcomplex, involving four species: Triatoma sordida, T. guasayana, T. garciabesi and T. patagonica. Given the great morphological similarity of these species, their taxonomic identification, evolutionary relationships and population differentiation have been controversial for many years and even today remain under discussion.
      Methods: We simultaneously analyzed two chromosomal markers, C-heterochromatin distribution and 45S ribosomal genes chromosomal position, of 139 specimens from several sordida subcomplex populations from Argentina, Bolivia, Brazil and Paraguay, collected both in nature and from several established insectaries. Our results were compared with COI sequences deposited in GenBank.
      Results: We recognized five chromosomal taxa with putative hybrids, which each differ in at least one chromosome marker. Most of them present significant differences in their mtDNA sequences.
      Conclusion: The chromosomal taxa here show a significant chromosome differentiation involving changes in the C-heterochromatin content and in the ribosomal clusters position. This paper identifies several erroneously classified populations by morphological methods, delimits the geographical distribution of each taxon and proposes the existence of a new cryptic species, widely distributed in Argentina. We also suggest that sordida sibling species involve closely related as well as evolutionary distant species. Taxonomic status of each chromosomal taxon is discussed considering phenotypic and genetic results previously published.
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    • الرقم المعرف:
      0 (Genetic Markers)
      0 (Insect Proteins)
      EC 1.9.3.1 (Electron Transport Complex IV)
    • الموضوع:
      Date Created: 20151001 Date Completed: 20160414 Latest Revision: 20181113
    • الموضوع:
      20231215
    • الرقم المعرف:
      PMC4589034
    • الرقم المعرف:
      10.1186/s13071-015-1109-6
    • الرقم المعرف:
      26419232