Abstract
A new experimental system for inducing mitochondrial DNA heteroplasmy in Drosophila was developed. By transplanting the germ plasm of Drosophila melanogaster and Drosophila mauritiana into the posterior pole of the recipient eggs of D. melanogaster, it was possible to introduce foreign mitochondria into the recipient female germline. Heteroplasmic individuals containing both donor and recipient mtDNA were obtained in intra- and interspecific combinations at similar frequencies. The proportion of donor-derived mtDNA in the heteroplasmic individuals varied considerably from individual to individual irrespective of the donor species used. No significant decrease in or elimination of donor mtDNA was observed, and the heteroplasmic state in female germlines persisted for several generations. The present system should serve very much to promote the study and clarification of the transmission genetics of mtDNA in insects.
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