Frequency of Naturally Occurring Insertions in DifferentDrosophila Species
| Species | DNA analyzed | Frequency of insertions (insertions/kb/chromosome) | Reference |
| D. buzzatii | |||
| 2stchromosomes | 7.1 kb[i] | 0 | This study |
| 2jchromosomes | 7.1 kb[i] | 0.601[ii] | This study |
| D. melanogaster | 578 kb | 0.005 | Charlesworth and Langley 1991 |
| D. melanogaster | 229 kb | 0.004 | Aquadro 1993 |
| D. simulans | 165 kb | 0.0005 | Aquadro 1993 |
| D. pseudoobscura | 32 kb | 0 | Aquadro 1993 |
| D. ananassae | |||
| forked locus | 18 kb | 0.004 | Stephan and Langley 1989 |
| vermilion locus | 18 kb | 0.017 | Stephan and Langley 1989 |
[i] For 2st and 2j chromosomes, the length of the single-copy region analyzed by Southern hybridization ofPstI-digested DNA in 2st chromosomes was considered.
[ii] Only those insertions known to have occurred independently were computed.