Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids.

ABSTRACT:

Background

Several genome duplications have occurred in the evolutionary history of teleost fish. In returning to a stable diploid state, the polyploid genome reorganized, and large portions are lost, while the fish lines evolved to numerous species. Large scale transposon movement has been postulated to play an important role in the genome reorganization process. We analyzed the DNA sequence of several large loci in Salmo salar and other species for the presence of DNA transposon families.

Results

We have identified bursts of activity of 14 families of DNA transposons (12 Tc1-like and 2 piggyBac-like families, including 11 novel ones) in genome sequences of Salmo salar. Several of these families have similar sequences in a number of closely and distantly related fish, lampr

SUBMITTER: de Boer JG 

PROVIDER: S-EPMC2198921 | biostudies-literature | 2007 Nov

REPOSITORIES: biostudies-literature