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Abstract

Eight isoline colonies of Anopheles peditaeniatus Leicester (Diptera: Culicidae) were established from wild-caught females collected from buffalo-baited traps at 8 localities in Thailand. They showed 2 types of X (X₂, X₃) and 4 types of Y (Y₂, Y₃, Y₄, Y₅) chromosomes based on the number and amount of major block(s) of heterochromatin present in the heterochromatic arm, and were tentatively designated as Forms B (X₂, X₃, Y₂), C (X₃, Y₃), D (X₃, Y₄) and E (X₂, X₃, Y₅). Form B was found in Nan, Ratchaburi, and Chumphon provinces; Form C was obtained in Chon Buri province; Form D was recovered in Kamphaeng Phet province; and Form E was acquired in Chiang Mai, Udon Thani, and Ubon Ratchathani provinces. Crossing studies among the 8 isoline colonies, which were representative of 4 karyotypic forms of An. peditaeniatus, revealed genetic compatibility in providing viable progenies and synaptic salivary gland polytene chromosomes through F₂-generations, thus suggesting the conspecific nature of these karyotypic forms. These results were supported by the very low intraspecific sequence variations (0.0 - 1.1%) of the nucleotide sequences in ribosomal DNA (ITS2) and mitochondrial DNA (COI and COII) of the 4 forms.

Keywords: COI, COII, crossing experiment, Hyrcanus group, ITS2, metaphase karyotype

Correspondence: wchoocho@mail.med.cmu.ac.th

Editor: Susan Paskewitz was editor of this paper

Received: 1 December 2009 | Accepted: 24 December 2009 | Published: 3 February 2011

Copyright: This is an open access paper. We use the Creative Commons Attribution 3.0 license that permits unrestricted use, provided that the paper is properly attributed.  

ISSN: 1536-2442 | Volume 11, Number 10

Choochote W. 2011. Evidence to support karyotypic variation of the mosquito, Anopheles peditaeniatus in Thailand. Journal of Insect Science 11:10 available online: insectscience.org/11.10