Heterochromatin in mitotic chromosomes of the Virilis species group of Drosophila

The amount of heterochromatin in the genome of ten members of the virilis species group was determined as the length of C-band chromosome material relative to the total karyotype length. The virilis phylad (Drosophila virilis, D. novamexicana, D. americana americana , and D. americana texana ) has s...

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Bibliographic Details
Published in:Genetica 1986-01, Vol.68 (2), p.113-118
Main Authors: MAHAN, J. T, BECK, M. L
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Cytogenetics
Drosophila
Drosophilidae
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Invertebrata
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Summary:The amount of heterochromatin in the genome of ten members of the virilis species group was determined as the length of C-band chromosome material relative to the total karyotype length. The virilis phylad (Drosophila virilis, D. novamexicana, D. americana americana , and D. americana texana ) has significantly greater amounts of heterochromatin in the genome than do members of the montana phylad (D. montana, D. lacicola, D. flavomontana, D. borealis, D. ezoana , D. littoralis ). Thus, the significant karyotypic change accompanying diversification of these species has involved reduction in their total constitutive heterochromatin.
ISSN:0016-6707
1573-6857
DOI:10.1007/BF02424408