Intergeneric Hybridization between Sympatric Kirikuchi Char and Red-Spotted Masu Salmon in a Small Japanese Mountain Stream

摘要: Abstract Hybridization occurs widely across salmonid species. Intergeneric hybridization of species in nature, however, has been rarely reported. Using microsatellite and mitochondrial DNA (mtDNA) markers, we obtained evidence intergeneric between threatened, naturally sympatric Kirikuchi char Salvelinus leucomaenis japonicus red-spotted masu salmon Oncorhynchus masou ishikawae an upper drainage the Totsu River system, which is located on Kii Peninsula, central Honshu, Japan. Fifteen suspected hybrid juveniles were captured August 2005 a tributary within surveyed drainage, where pair consisting female male was observed during preceding spawning season. The hybrids all appeared to be F1 basis genotypes at five loci, consistent with previously reported infertility such hybrids. maternal parent presumed char, s...