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GENETIC RELATIONSHIPS AMONG REPRESENTATIVE POPULATIONS OF FIVE CHORISTONEURA SPECIES: C. OCCIDENTALIS, C. RETINIANA, C. BIENNIS, C. LAMBERTIANA, AND C. FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)1

Published online by Cambridge University Press:  31 May 2012

M. W. Stock  and
P. J. Castrovillo
M. W. Stock
Affiliation:
Department of Forest Resources, University of Idaho, Moscow, Idaho 83843
P. J. Castrovillo
Affiliation:
Department of Forest Resources, University of Idaho, Moscow, Idaho 83843
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Abstract

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The genetic make-up of representative populations of five Choristoneura species was compared using starch gel electrophoresis. Species included C. occidentalis Freeman from Idaho, C. biennis Freeman from British Columbia, C. retiniana (Walsingham) (= C. viridis Freeman) from Oregon, C. lambertiana ponderosana Obraztsov from Colorado, and C. fumiferana (Clemens) from Maine. When variation at individual gene loci was examined, intraspecific variation was often as great, and sometimes greater, than interspecific variation and few significant differences were noted among the species. The highest levels of overall genetic similarity occurred among C. occidentalis, C. biennis, and C. retiniana. Relatively greater genetic distances were found between this group and C. lambertiana and C. fumiferana. C. fumiferana was most distantly related to all other groups. Genetic identity values fell within the range more commonly associated with conspecific populations rather than with separate species.

Résumé

La constitution génétique de populations représentatives de cinq espèces de Choristoneura a été comparée par électrophorèse sur gel d’amidon. Les espèces étaient C. occidentalis Freeman de l’Idaho, C. biennis Freeman de Colombie Britannique, C. retiniana (Walsingham) (= C. viridis Freeman) d’Oregon, C. lambertiana ponderosana Obraztsov du Colorado, et C. fumiferana (Clemens) du Maine. L’examen de la variation à des loci géniques individuels a révélé que la variation intraspécifique est souvent aussi grande, et parfois plus grande, que la variation interspécifique, et peu de différences significatives ont été notées entre les espèces. Les niveaux de similarité génétique globale les plus élevés ont été observés entre C. occidentalis, C. biennis et C. retiniana. Des distances génétiques relativement grandes ont été observées entre ce groupe, et C. lambertiana ou C. fumiferana. C. fumiferana était l’espèce la plus distante de tous les autres groupes. Les valeurs d’identité génétique mesurées se répartissent sur un intervalle plus communément associé à des populations conspécifiques qu’à deo espèces discrètes.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 9 , September 1981 , pp. 857 - 865
Copyright
Copyright © Entomological Society of Canada 1981

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