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Karyotype of the gall fly Tomoplagia rudolphi (Lutz & Lima) (Diptera, Tephritidae)

Abstract

The objective of the present study is to describe the karyotype of the fruit fly Tomoplagia rudolphi (Lutz & Lima, 1918). This fly induces the formation of galls on the stems of Vernonia polianthes (Asteraceae). The cytogenetic analysis of cerebral ganglia (larva and pupa) and testis (adults) of T. rudolphi showed a diploid chromosome number of 2n = 10 + xx (female) and 2n = 10 + xy (male). The diploid chromosome number 2n = 12 and the XX/XY sex determination system have been found in most of the species studied. The present investigation constitutes the first cytogenetics study of the genus Tomoplagia Coquilltt, 1910.

Chromosome; Cyclorrhapha; cytogenetic; fruit fly; sex determination


Karyotype of the gall fly Tomoplagia rudolphi (Lutz & Lima) (Diptera, Tephritidae)

Marco Antônio A. CarneiroI,II; Luiz Fernando GomesIII; Silvia das Graças PompoloIII; Lucio Antonio de Oliveira CamposIII

ICurso de Pós-graduação em Entomologia, Departamento de Biologia Animal, Universidade Federal de Viçosa. 36571-000 Viçosa, Minas Gerais, Brasil

IIDepartamento de Ciências Biológicas, ICEB, Universidade Federal de Ouro de Preto. 35400-000 Ouro Preto, Minas Gerais, Brasil

IIILaboratório de Citogenética e Evolução, Departamento de Biologia Geral, Universidade Federal de Viçosa. 36571-000, Viçosa, Minas Gerais, Brasil

ABSTRACT

The objective of the present study is to describe the karyotype of the fruit fly Tomoplagia rudolphi (Lutz & Lima, 1918). This fly induces the formation of galls on the stems of Vernonia polianthes (Asteraceae). The cytogenetic analysis of cerebral ganglia (larva and pupa) and testis (adults) of T. rudolphi showed a diploid chromosome number of 2n = 10 + xx (female) and 2n = 10 + xy (male). The diploid chromosome number 2n = 12 and the XX/XY sex determination system have been found in most of the species studied. The present investigation constitutes the first cytogenetics study of the genus Tomoplagia Coquilltt, 1910.

Key words: Chromosome, Cyclorrhapha, cytogenetic, fruit fly, sex determination

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ACKNOWLEDGMENTS. We thank E.S.a. Marques e Dr. R.A. Zucchi for taxon identification, and two anonymous reviewers for their comments on early drafts of this manuscript. M. A.A.C. received financial support from CNPq (# 131245/95-3).

Recebido em 06.VIII.1998; aceito em 26.XI.1999.

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Publication Dates

  • Publication in this collection
    04 June 2009
  • Date of issue
    1999

History

  • Received
    06 Aug 1998
  • Accepted
    26 Nov 1999
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