Cytological evidence of male heterogamety in sex determination of Telmatoscopus albipunctatus (Diptera: Psychodidae)

Telmatoscopus albipunctatus is polymorphic for several polytene chromosome bands. In examining the inheritance of a polymorphic heterochromatin-like band in chromosome IV we verified that it is inherited like a sex-linked factor. There are two types of chromosome IV in regard to this band: one bears...

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Bibliographic Details
Published inChromosoma Vol. 62; no. 2; pp. 133 - 138
Main Author Amabis, J.M
Format Journal Article
LanguageEnglish
Published Austria 01.01.1977
Subjects
Animals
arthropods
Chromosomes
Diptera - cytology
entomology
Heterochromatin - ultrastructure
insects
Male
Sex Determination Analysis
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Summary:Telmatoscopus albipunctatus is polymorphic for several polytene chromosome bands. In examining the inheritance of a polymorphic heterochromatin-like band in chromosome IV we verified that it is inherited like a sex-linked factor. There are two types of chromosome IV in regard to this band: one bears a very thick heterochromatin-like band (H+), and the other bears a thinner corresponding band (H-). Three kinds of combinations are found in our stocks: H+H+, H+H- and H-H-. All three combinations can be found in females; however, in males, only the combinations H+H- and H-H- are found. Through specific crosses, it was concluded that the sex determining factor is located in chromosome IV in close vicinity to these bands.
ISSN:0009-5915
1432-0886
DOI:10.1007/BF00292635