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.
P-element sequences from nine Dipteran species, including D.nebulosa, have been compared. The P-element phylogeny contradicts the phylogeny of the species, suggesting that horizontal transfer of P-elements may have occurred.
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.
P-element sequences from nine Dipteran species, including D.nebulosa, have been compared. The P-element phylogeny contradicts the phylogeny of the species, suggesting that horizontal transfer of P-elements may have occurred.
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.
Comparison of the Dbif\P-element with the D.melanogaster P-element and the Dneb\P-element shows that the two latter sequences are more similar ro each other than either is to the Dbif\P-element. This contradicts the phylogenetic relationship of the species, and suggests that recent horizontal transfer of P-elements from a relative of D.bifasciata to D.melanogaster has occurred.