Evolution of Tandem Repeat Satellite Sequences in Two Closely Related Caenorhabditis Species. Diminution of Satellites in Hermaphrodites.

ABSTRACT: The availability of the genome sequence of the unisexual (male-female) Caenorhabditis nigoni offers an opportunity to compare its non-coding features with the related hermaphroditic species Caenorhabditis briggsae; to understand the evolutionary dynamics of their tandem repeat sequences (satellites), as a result of evolution from the unisexual ancestor. We take advantage of the previously developed SATFIND program to build satellite families defined by a consensus sequence. The relative number of satellites (satellites/Mb) in C. nigoni is 24.6% larger than in C. briggsae. Some satellites in C. nigoni have developed from a proto-repeat present in the ancestor species and are conserved as an isolated sequence in C. briggsae. We also identify unique s

SUBMITTER: Subirana JA 

PROVIDER: S-EPMC5748669 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature