Genetic and Cytogenetic Analysis of the Walnut-Husk Fly (Diptera: Tephritidae)

Author:

Drosopoulou E1,Koeppler K2,Kounatidis I1,Nakou I1,Papadopoulos N T3,Bourtzis K4,Mavragani-Tsipidou P1

Affiliation:

1. Department of Genetics, Development and Molecular Biology, School of Biology, Faculty of Sciences, Aristotle University of Thessaloniki (AUTH), 54124 Thessaloniki, Greece

2. Julius Kuhn-Institute, Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Fruit Crops and Viticulture, Schwabenheimer Strasse 101, 69221 Dossenheim, Germany

3. Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou St., 38446 N. Ionia (Volos), Magnisia, Greece

4. Department of Environmental and Natural Resources, University of Ioannina, 30100 Agrinio, Greece

Abstract

Abstract Genetic and cytogenetic information is an essential basis for understanding the biology of insect pests, as well as for designing modern control strategies. The walnut husk fly, Rhagoletis completa (Cresson) (Diptera: Tephritidae), is an important pest of walnuts (Juglans spp.) in North America and has invaded Europe in the early 1990s. Studies on the genetics and cytogenetics of R. completa are scarce. The mitotic karyotype and detailed photographic maps of the salivary gland polytene chromosomes of this pest species are presented here. The mitotic metaphase complement consists of six pairs of chromosomes, the sex chromosomes being very small and similar in size. The analysis of the salivary gland polytene complement shows a total number of five long chromosomes (10 polytene arms) that correspond to the five autosomes of the mitotic nuclei and a heterochromatic mass corresponding to the sex chromosomes. The banding pattern as well as the most characteristic features and prominent landmarks of each polytene chromosome are presented and discussed.

Publisher

Oxford University Press (OUP)

Subject

Insect Science

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