Abstract
The phylogenetic relationships among three derivative forms of the immigrans-Hirtodrosophila radiation viz. Chaetodrosophilella, Zaprionus and the immigrans species group are examined, by comparing the banding patterns of their polytene chromosomes and by analysing the nature of their heterochromatin. Based on the results of these studies it is concluded that D. quadrilineata has a very strong affinity with the members of the immigrans species group, while the genus Zaprionus represents a very distinct evolutionary lineage. This study further indicates that D. quadrilineata is a karyotypically primitive species having five pairs of rods and one pair of dots, while the karyotype of other members of the immigrans species group appears to have undergone modifications through fusions, fissions, inversions and the addition or deletion of heterochromatin to dots and other chromosomes.
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Kumar, A., Gupta, J.P. Interrelationships among three derivative forms of the immigrans-Hirtodrosophila radiation: evidence from heterochromatin and polytene chromosomes. Genetica 75, 39–46 (1987). https://doi.org/10.1007/BF00056031
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DOI: https://doi.org/10.1007/BF00056031