Cytogenetical studies on three species of Noemacheilinae and Gastromyzoninae fishes (Cobitidae; Cypriniformes).
Karyotype including NORs were examined in three species of fishes in the family Cobitidae. In the subfamily Noemacheilinae, Lefua nikkonis showed 2n=50 categorized into 4 metacentric (m), 24 submeta- and subtelocentric (sm-st) and 22 acrocentric (a) chromosomes, including NORs on a pair of medium size sm-st chromosome. This species has 1.0 pg DNA content per diploid nucleus. Micronemacheilus pulcher from the same subfamily showed 2n=50 chromosomes consisted of 8 m, 30 sm-st and 12 a chromosomes, including NORs on a pair ofa chromosome. In Beaufortia kweichoensis kweichowensis belonging to the subfamily Gastromyzoninae, the karyotypc with 2n=48, comprising 10 m, 26 sm-st and 12 a was observed. NORs were located at interstitial region of long arm of the longest sm chromosome.
Laboratory of Aquatic Bioscience, Department of Bioproduction, Faculty of Bio-Industry, Tokyo University of Agriculture, Yasaka, Abashiri-shi, Hokkaido, Japan. a-suzuki@bioindustry.nodai.ac.jp
Atsushi
A
Suzuki
D000818:Animals; D002965:Classification; D003531:Cypriniformes / Q000145:classification / Q000235:genetics*; D004247:DNA / Q000032:analysis; D007621:Karyotyping; D009697:Nucleolus Organizer Region
D004247:DNA