The First Report of Nors and Chromosome Analysis of Tripletail Wrasse, Cheilinus Trilobatus (Perciformes: Labridae)
© 2014 The Japan Mendel Society Cytologia 79(4): 437–443 The First Report of NORs and Chromosome Analysis of Tripletail Wrasse, Cheilinus trilobatus (Perciformes: Labridae) Sarawut Kaewsri1, 4, Pasakorn Saenjundaeng2, Sarun Jumrusthanasan1, Ratree Suksuwan3, Alongklod Tanomtong1* and Weerayuth Supiwong2 1 Applied Taxonomic Research Center (ATRC), Department of Biology, Faculty of Science, Khon Kaen University, Muang, Khon Kaen 40002, Thailand 2 Faculty of Applied Science and Engineering, Khon Kaen University, Nong Kai Campus, Muang, Nong Kai 43000,Thailand 3 Phuket Marine Biological Center (PMBC), 51 Moo 8 Sakdided Road, Wichit, Muang, Phuket 83000, Thailand 4 Biology Program, Department of Science, Faculty of Science, Buriram Rajabhat University, Muang, Buriram 31000, Thailand Received June 17, 2013; accepted October 20, 2013 Summary We report the first chromosome analysis and chromosomal characteristics of nucleolar organizer regions/NORs in the tripletail wrasse (Cheilinus trilobatus) from the Andaman Sea, Southern Thailand. Kidney cell samples were taken from three male and three female fishes. The mitotic chromosome preparation was prepared directly from kidney cells. Conventional staining and Ag-NOR banding techniques were applied to stain the chromosomes. The results showed that the diploid chromosome number of C. trilobatus was 2n=38, the fundamental number (NF) was 54 in both males and females. The types of chromosomes were 6 large metacentric, 4 medium metacentric, 2 medium submetacentric, 4 medium telocentric, 4 small submetacentric, and 18 small telocentric chromosomes. The region adjacent to the short arms near the telomeres of submetacentric chromosome pair 7 showed clearly observable NORs. There was no observation of irregularly sized chromosomes related to sex. The karyotype formula for C.
[Show full text]