Examination of the P-element phylogeny in light of the species phylogeny suggests that additional horizontal transfers may have occurred at various times in the past and may explain the overall structure of the P-element phylogeny in Sophophora.
An extensive survey of the occurrence of P-element homologous sequences in the genus Drosophila has been carried out by Southern blot analysis. The strongest hybridisation of P-element probes occurs in species from the closely related willistoni and saltans groups.
Examination of the P-element phylogeny in light of the species phylogeny suggests that additional horizontal transfers may have occurred at various times in the past and may explain the overall structure of the P-element phylogeny in Sophophora.
A phylogenetic survey has identified four major P-element subfamilies in the saltans and willistoni species groups of Drosophila.
An extensive survey of the occurrence of P-element homologous sequences in the genus Drosophila has been carried out by Southern blot analysis. The strongest hybridisation of P-element probes occurs in species from the closely related willistoni and saltans groups.