Publication: Cytogenetic evidence for two species within the current concept of the malaria vector Anopheles leucosphyrus in Southeast Asia.
Issued Date
1988-03-01
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ISSN
8756971X
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2-s2.0-0023980011
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of the American Mosquito Control Association. Vol.4, No.1 (1988), 44-50
Suggested Citation
V. Baimai, R. E. Harbach, S. Sukowati Cytogenetic evidence for two species within the current concept of the malaria vector Anopheles leucosphyrus in Southeast Asia.. Journal of the American Mosquito Control Association. Vol.4, No.1 (1988), 44-50. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/15482
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Title
Cytogenetic evidence for two species within the current concept of the malaria vector Anopheles leucosphyrus in Southeast Asia.
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Abstract
Karyotypes and crossing relationships were investigated for three allopatric populations of Anopheles leucosphyrus in Southeast Asia: South Kalimantan, Sumatra and Thailand. The mitotic karyotypes of these populations were similar to those previously observed in other species of the An. leucosphyrus group. Populations from Thailand and South Kalimantan exhibited telocentric and subtelocentric sex chromosomes, respectively, with a distinctive band of intercalary heterochromatin in the X chromosome. Strikingly different submetacentric X and Y chromosomes were observed in the population from Sumatra, and it seems likely that the evolution of these chromosomes occurred through the acquisition of constitutive heterochromatin. Sterile F1 males were observed in crosses between the Sumatra population and the populations from South Kalimantan and Thailand. No genetic incompatibility was observed in crosses between the latter two populations. We believe that the present concept of An. leucosphyrus includes two allopatric species, one inhabiting Borneo, West Malaysia and southern Thailand and one confined to Sumatra.