Evolution of Y chromosomal lampbrush loop DNA sequences of Drosophila |
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Authors: | Peter Vogt Wolfgang Hennig Dorette ten Hacken Pieter Verbost |
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Institution: | (1) Department of Genetics, University of Nijmegen, Toernooiveld, NL-6525 ED Nijmegen, The Netherlands;(2) Present address: Institut für Anthropologie und Humangenetik, Universität Heidelberg, Im Neuenheimer Feld 328, D-6900 Heidelberg, Federal Republic of Germany |
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Abstract: | The evolutionary conservation of Y chromosomal DNA sequences of Drosophila hydei in different species of the genus Drosophila was studied by in situ hybridization and on genomic DNA blots of restriction enzyme digested DNA. We demonstrated that Y specific DNA sequences, which form major parts of lampbrush loops related to the male fertility genes, are only retained in a few closely related species during evolution. Other Y chromosomal DNA sequences, also present in lampbrush loops but with homology to autosomal and X chromosomal locations, were found in distant species. We propose a model for the evolution of the Y chromosomal lampbrush loops. |
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