Population genomics of Chaenogobius annularis

Chaenogobius annularis has two geographic groups (Pacific Ocean and Sea of Japan groups), and the two groups have formed a stable hybrid population. To investigate the maintenance mechanisms of this hybrid population, we analyzed the genomic status of the two groups and the hybrid population by de novo genome sequencing, RAD sequencing, amplicon sequencing, RNA sequencing, and whole mitogenome sequencing.