The origin of a selfish B chromosome triggering paternal sex ratio in the parasitoid wasp Trichogramma kaykai.

ABSTRACT: This study uses molecular and cytogenetic methods to determine the origin of a B chromosome in some males of the wasp Trichogramma kaykai. This so-called paternal sex ratio (PSR) chromosome transmits only through sperm and shortly after fertilization triggers degeneration of the paternal genome, while keeping itself intact. The resulting embryos develop into haploid B-chromosome-carrying males. Another PSR chromosome with a very similar mode of action is found in the distantly related wasp Nasonia vitripennis and its origin was traced by transposon similarity to the genus Trichomalopsis, which is closely related to Nasonia. To determine whether both PSR chromosomes have a similar origin we aimed to reveal the origin of the Trichogramma PSR chromosome. Using fluorescent in situ hybridizatio

SUBMITTER: Van Vugt JJ 

PROVIDER: S-EPMC2821346 | biostudies-literature | 2009 Dec

REPOSITORIES: biostudies-literature