Molecular Biology and Evolution, Vol 11, 406-416, Copyright © 1994 by Society for Molecular Biology and Evolution
GN Fritz, J Conn, A Cockburn and J Seawright
Sequence variation of the ribosomal DNA internal transcribed spacer 2
(ITS2) was examined for populations of the malaria vector Anopheles
nuneztovari collected in Colombia, Venezuela, Bolivia, Suriname, and
Brazil. Mosquitoes from Colombia and Venezuela had identical ITS2 sequences
and were distinguished from sequences in other populations by three
insertion/deletion events (indels) and by one transversion. The length of
the ITS2 was 363-369 bp, and it had a G+C content of 55.3%- 55.7%.
Variation in the length of the ITS2 between and within populations was due
to indels in simple repeats. ITS2 consensus sequences were similar or
identical for samples from the following three groups: (1) Colombia,
Bolivia, and Venezuela; (2) Suriname and northern Brazil; and (3) eastern
and central Brazil. The presence of two different consensus sequences from
a single location near Manaus, Brazil, suggests that populations from
eastern Brazil and those from Suriname converge in this region of the
Amazon Basin. These data show that putative cryptic species of An.
nuneztovari are distinguished by very minor differences in DNA sequence of
the ITS2 region.
ORIGINAL ARTICLE
Sequence analysis of the ribosomal DNA internal transcribed spacer 2 from populations of Anopheles nuneztovari (Diptera: Culicidae)
Entomology and Nematology Department, University of Florida, Gainesville 32611.
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