Nonrecombining genes in a recombination environment: the Drosophila "dot" chromosome.

ABSTRACT: Rate of recombination is a powerful variable affecting several aspects of molecular variation and evolution. A nonrecombining portion of the genome of most Drosophila species, the "dot" chromosome or F element, exhibits very low levels of variation and unusual codon usage. One lineage of Drosophila, the willistoni/saltans groups, has the F element fused to a normally recombining E element. Here, we present polymorphism data for genes on the F element in two Drosophila willistoni and one D. insularis populations, genes previously studied in D. melanogaster. The D. willistoni populations were known to be very low in inversion polymorphism, thus minimizing the recombination suppression effect of inversions. We first confirmed, by in situ hybridization, that D. insularis has the same E + F fus

SUBMITTER: Powell JR 

PROVIDER: S-EPMC3002241 | biostudies-literature | 2011 Jan

REPOSITORIES: biostudies-literature