Invasion and persistence of a selfish gene in the Cnidaria.

ABSTRACT:

Background

Homing endonuclease genes (HEGs) are superfluous, but are capable of invading populations that mix alleles by biasing their inheritance patterns through gene conversion. One model suggests that their long-term persistence is achieved through recurrent invasion. This circumvents evolutionary degeneration, but requires reasonable rates of transfer between species to maintain purifying selection. Although HEGs are found in a variety of microbes, we found the previous discovery of this type of selfish genetic element in the mitochondria of a sea anemone surprising.

Methods/principal findings

We surveyed 29 species of Cnidaria for the presence of the COXI HEG. Statistical analyses provided evidence for HEG invasion. We also found that 96 individuals of Metridium senile

SUBMITTER: Goddard MR 

PROVIDER: S-EPMC1762336 | biostudies-literature | 2006 Dec

REPOSITORIES: biostudies-literature