Identification of Hybrids between the Far Eastern Redfins Tribolodon hakonensis and T. brandtii Based on the Cephalic Lateral-Line System and Four Molecular Genetic Markers

Abstract

Three species of the genus Tribolodon (T. hakonensis, T. brandtii, and T. sachalinensis) and hybrids between T. hakonensis and T. brandtii have been analyzed using the cephalic lateral-line system and four molecular genetic markers: nuclear DNA (Rho and ITS-1–5.8S–ITS-2) and mitochondrial DNA (Co-1 and Cyt-b). It was shown that the presence of a connection between postopercular and preopercularmandibular canals of the cephalic lateral line on one side of the head (such connection on both sides of the head is a characteristic of T. brandtii) and the absence of such a connection on the other side (such connection on both sides of the head is a characteristic of T. hakonensis), along with p-distances for markers Rho, ITS-1–5.8S–ITS-2, Co-1, and Cyt-b, can reveal hybrid individuals between T. hakonensis and T. brandtii.