Internal repetition and intraindividual variation in the rDNA ITS1 of the anopheles punctulatus group (Diptera: Culicidae): multiple units and rates of turnover.

Journal of Molecular Evolution
James E BowerNigel W Beebe

Abstract

The rapid divergence of repetitive sequences makes them desirable markers for phylogenetic studies of closely related groups, provided that a high level of sequence homogeneity has been maintained within species. Intraspecific polymorphisms are found in an increasing number of studies now, and this highlights the need to determine why these occur. In this study we examined intraindividual variation present in the first ribosomal internal transcribed spacer (ITS1) from a group of cryptic mosquito species. Individuals of the Anopheles punctulatus group contained multiple ITS1 length variants that ranged from 1.2 to 8.0 kb. Nucleotide and copy number variation for several homologous internal repeats is common, yet the intraspecific sequence divergence of cloned PCR isolates is comparable to that of other mosquito species (~0.2-1.5%). Most of the length variation is comprised of a 5'-ITS1 repeat that was identified as a duplication of a conserved ITS2 region. Secondary structure conservation for this repeat is pronounced and several repeat types that are highly homogenized have formed. Significant interspecific divergence indicates a high rate of evolutionary change for this spacer. A maximum likelihood tree constructed here was co...Continue Reading

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Citations

Jan 11, 2012·The American Journal of Tropical Medicine and Hygiene·Cara N Henry-HalldinPeter A Zimmerman
Sep 30, 2009·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Melba Herrera-AguilarEric Dumonteil
Aug 26, 2011·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·J R LoaizaJ E Conn
Jun 9, 2016·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Sebastián DíazAndrés Gómez-Palacio
Mar 23, 2018·Parasitology·Nigel W Beebe
Feb 9, 2019·Medical and Veterinary Entomology·C D SchenkelC Silaghi
Nov 4, 2016·G3 : Genes - Genomes - Genetics·Jana BatovskaMark J Blacket
Jul 2, 2020·PeerJ·Pedro M PedroMaria Anice Mureb Sallum
May 1, 2021·Plants·Olivier C G HeylenJill K Olofsson

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