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Bragantia

Print version ISSN 0006-8705

Bragantia vol.17 no.unico Campinas  1958

http://dx.doi.org/10.1590/S0006-87051958000100034 

Observações citológicas em "môscas das frutas"

 

Cytological observations on "fruit flies"

 

 

Luiz O. T Mendes

 

 


SUMMARY

The author presents the results of some cytological studies on three species of "fruit flies".
Lonchaea pendula Bezzi (Lonchaeidae) has only three pairs of somatic chromosomes (2n=6).
In Anastrepha fraterculus (Wied.) (Trypetidae) 2n=12. The females are 10A + XX and the males 10A + XY. The Y is the smallest chromosome of the set. In this species all centromeres seem to be terminal or subterminal. Giant chromosomes were observed in cells of the salivary glands.
In Ceratitis capitata (Wied.) (Trypetidae) 2n=12. The females are 10A + XX and the males 10A + XY. In three pairs of autosomes the centromere is median, and in two pairs subterminal. In the X chromosome the centromere is subterminal. The Y chromosome has a satellite or pseudosatellite. Giant chromosomes were observed in cells of the salivary glands, Malpighian tubes and intestins.
It is possible to identify the larvae of these three species of fruit flies by the morphology and behaviour of the chromosomes in somatic tissue.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

Recebida para publicação em 20 de setembro de 1958.

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