Fig. 2.

Allele-specific expression of MSX2A in F1 hybrid fish. Expression ratios of freshwater (PAXB) to marine (RABS) transcript, as measured by pyrosequencing of an intron-spanning PCR product in F1 hybrids. DS1, DS2, PS, CF, C, PM, and LJ showed significant differences (*) from a 50:50 control plasmid mixture. Error bars represent standard error of the mean (SEM). C cloaca, CF caudal fin, DS dorsal spine, LJ lower jaw, PAXB Paxton Lake benthic population, PF pectoral fin, PM premaxilla, PS pelvic spine, RABS Rabbit Slough marine population