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. 1993 Feb;133(2):361–373. doi: 10.1093/genetics/133.2.361

Efficient and Dispersed Local P Element Transposition from Drosophila Females

P Zhang 1, A C Spradling 1
PMCID: PMC1205325  PMID: 8382178

Abstract

We have investigated how Drosophila P element insertions are distributed in the chromosomal region near their starting site. A single P element residing in the euchromatin of minichromosome Dp1187 was mobilized following a cross to the Δ2-3 (99B) strain, and progeny bearing transpositions were identified with a minimum of bias by performing Southern blots on progeny. Approximately 1-2% of all progeny minichromosomes contained new insertions. Many of these ``local transpositions'' landed very close to or within the starting P element; however, nearly 1% of all progeny chromosomes contained new insertions 1-180 kb from the donor element. More local insertions were observed in the progeny of females than from male parents, and most occurred in a preferred orientation relative to the starting element. These observations suggested that donor elements are frequently excised and reinserted locally without ever dissociating from a transposition complex. The high frequency and diverse distribution of local transpositions recovered from females suggested that the efficiency of insertional mutagenesis can be significantly enhanced by using a starting P element(s) located near the target of interest.

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Selected References

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