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Variation in the life cycle and morphology of the tobacco host-race of Myzus persicae (Hemiptera: Aphididae) in relation to its geographical distribution

Published online by Cambridge University Press:  09 March 2007

T.E. Kephalogianni
Affiliation:
Laboratory of Entomology and Agricultural Zoology, Faculty of Crop and Animal Production, University of Thessaly, Fytokou St., 38446 Nea Ionia, Magnesia, Greece
J.A. Tsitsipis*
Affiliation:
Laboratory of Entomology and Agricultural Zoology, Faculty of Crop and Animal Production, University of Thessaly, Fytokou St., 38446 Nea Ionia, Magnesia, Greece
J.T. Margaritopoulos
Affiliation:
Laboratory of Entomology and Agricultural Zoology, Faculty of Crop and Animal Production, University of Thessaly, Fytokou St., 38446 Nea Ionia, Magnesia, Greece
E. Zintzaras
Affiliation:
National Agricultural Research FoundationAigialeias 19, 15125 Athens, Greece
R. Delon
Affiliation:
Cetarsa Compania Espaniola de Tabaco en Ramas S.A., Jose Abascal 2, 20spn, 28003 Madrid, Spain
I. Blanco Martin
Affiliation:
I.T.B.-Seita 24100 Bergerac, France
W. Schwaer
Affiliation:
Landesantalt für Pflanzenbau Forchheim, Kutschenweg 20, 76287 Rheinstetten, Germany
*
*Fax: +30 0421 93286 E-mail: [email protected]

Abstract

Morphological variation and life cycle category were examined in 121 clones of Myzus persicae (Sulzer). The clones were collected from tobacco from three localities in Greece (Xanthi, Nea Efessos and Naphplion), one in Germany (Rheinstetten), one in France (Bergerac) and one in Spain (Madrid). Before morphometrics, all aphids were laboratory-reared on potato. The morphological variation was investigated using both canonical variates analysis and a novel non-parametric classification tree method. The life cycle category was examined by rearing the clones for three generations under short day conditions. In Nea Efessos a relative high proportion of clones was found to overwinter as eggs on the primary host. In the other regions all collected clones were non-holocyclic. Intermediate genotypes were found in all regions at percentages ranging from 4.0 to 24.0%. Androcyclic clones were found only in Xanthi, Greece (4.0%) and Rheinstetten, Germany (16.7%). The canonical variates analysis and the tree classification method revealed important intrapopulation polymorphisms in clones from Bergerac, Nea Efessos and Madrid. Both methods separated the populations originating from Greece from those collected elsewhere in western Europe. The observed morphological variation was probably due to genetic differences, since all clones were reared in a common environment. The results are discussed in relation to factors responsible for genetic divergence in M. persicae populations.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2002

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