microsatellite_genotypes

Microsatellite genotypes from wild stickleback samples collected 2006-2009. Population codes can be found in readme file. Marker names can found from Ensembl

Structure input data (Libyan set)

Structure input data (Libyan set

Structure 7500 SNPs input file

Structure 7500 SNPs input fil

SNPs and sperm length data

SNPs and sperm length dat

COI sequences

COI sequence

SNAPP 2000SNPs input file

SNAPP 2000SNPs input fil

SNAPP Libya input file

SNAPP Libya input fil

The genetic basis of a recent transition to live-bearing in marine snails

Key innovations are fundamental to biological diversification, but their genetic basis is poorly understood. A recent transition from egg-laying to live-bearing in marine snails (Littorina spp.) provides the opportunity to study the genetic architecture of an innovation that has evolved repeatedly across animals. Individuals do not cluster by reproductive mode in a genome-wide phylogeny, but local genealogical analysis revealed numerous small genomic regions where all live-bearers carry the same core haplotype. Candidate regions show evidence for live-bearer–specific positive selection and are enriched for genes that are differentially expressed between egg-laying and live-bearing reproductive systems. Ages of selective sweeps suggest that live-bearer–specific alleles accumulated over more than 200,000 generations. Our results suggest that new functions evolve through the recruitment of many alleles rather than in a single evolutionary step.</p