Molecular Biology and Evolution, Vol 9, 1050-1060, Copyright © 1992 by Society for Molecular Biology and Evolution
GM Simmons
The hobo family of transposable elements, one of three transposable-
element families that cause hybrid dysgenesis in Drosophila melanogaster,
appears to be present in all members of the D. melanogaster species
complex: D. melanogaster, D. simulans, D. mauritiana, and D. sechellia.
Some hobo-hybridizing sequences are also found in the other members of the
melanogaster subgroup and in many members of the related montium subgroup.
Surveys of older isofemale lines of D. melanogaster suggest that complete
hobo elements were absent prior to 50 years ago and that hobo has recently
been introduced into the species by horizontal transfer. To test the
horizontal transfer hypothesis, the 2.6-kb XhoI fragments of hobo elements
from D. melanogaster, D. simulans, and D. mauritiana were cloned and
sequenced. The DNA sequences reveal an extremely low level of divergence
and support the conclusion that the active hobo element has been
horizontally transferred into or among these species in the recent past.
ORIGINAL ARTICLE
Horizontal transfer of hobo transposable elements within the Drosophila melanogaster species complex: evidence from DNA sequencing
Department of Biology, City College of the City University of New York, New York 10031.
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