Abstract
The karyotype of Vaillantella maassi, a loach with an unusually long dorsal fin, was investigated using sequential CMA3 and AgNO3 staining to test if this character evolved in parallel with Vaillantella’s morphological distinctness. The karyotype was 2n = 50 with 13 pairs of metacentric-submetacentric and 12 pairs of subtelocentric chromosomes. Sequential CMA3 banding and AgNO3 staining evidenced NORs in the short arms of pair no. 2. Additional CMA3-positive, Ag-negative signals were present in the short arms of pairs 14 and 15. The karyotype paralleled those of most other cobitoid loaches studied so far and is apparently not associated with the morphological distinctness of Vaillantella.
References
Buth DG, Dowling TE, Gold JR (1991) Molecular and cytological investigations. In: Winfield IJ, Nelson JS (eds) Cyprinid fishes: systematics, biology and exploitation. Chapman & Hall, London, pp 83–126
Howell WM, Black DA (1980) Controlled silver-staining of nucleolus organizer regions with a protective colloidal developer: a 1-step method. Experientia (Basel) 36:1014–1015
Klinkhardt M, Tesche M, Greven H (1995) Database of fish chromosomes. Westarp, Magdeburg
Kottelat M (1994) Vaillantella cinnamomea, a new species of balitorid loach from eastern Borneo. Jpn J Ichthyol 40:427–431
Nalbant TT (2002) Sixty million years of evolution. Part one: family Botiidae (Pisces: Ostariophysi: Cobitoidea). Trav Mus Hist Nat “Grigore Antipa” 44:309–344
Nalbant TT, Bănărescu P (1977) Vaillantellinae, a new subfamily of Cobitidae (Pisces, Cypriniformes). Zool Meded 52:99–105
Rábová M, Ráb P, Ozouf-Costaz C (2001) Extensive polymorphism and chromosomal characteristics in a loach fish, Cobitis vardarensis (Ostariophysi, Cobitidae), detected by different banding techniques and flourescence in situ hybridisation. Genetica 111:413–422
Roberts T (1989) The freshwater fishes of western Borneo (Kalimantan Barat, Indonesia). Mem Calif Acad Sci 14:1–210
Saitoh K, Sado T, Mayden LR, Hanzawa N, Nakamura K, Nishida M, Miya M (2006) Mitogenomic evolution and interrelationships of the Cypriniformes (Actinopterygii: Ostariophysi): the first evidence toward resolution of higher-level relationships of the world’s largest freshwater fish clade based on 59 whole mitogenome sequences. J Mol Evol 63:826–841
Sawada Y (1982) Phylogeny and zoogeography of the superfamily Cobitoidea (Cyprinoidei, Cypriniformes). Mem Fac Fish Hokkaido Univ 28:65–223
Šlechtová V, Bohlen J, Tan HH (2007) Families of Cobitoidea (Teleostei; Cypriniformes) as revealed from nuclear genetic data and the position of the mysterious genera Barbucca, Psilorhynchus, Serpenticobitis and Vaillantella. Mol Phylogenet Evol 44:1358–1365
Sola L, Rossi AR, Iaselli V, Rasch EM, Monaco JP (1992) Cytogenetics of bisexual/unisexual species of Poecilia. II. Analysis of heterochromatin and nucleolar organizer regions in Poecilia mexicana mexicana by C-banding and DAPI, quinacrine, chromomycin A3, and silver staining. Cytogenet Cell Genet 60:229–235
Suzuki A, Taki Y (1996) Tetraploidisation in the cobitid subfamily Botinae (Pisces, Cypriniformes). Cytobios 85:229–245
Völker M, Sonnenberg R, Ráb P, Kullmann H (2006) Karyotype differentiation in Chromaphyosemion killifishes (Cyprinodontiformes, Nothobranchiidae). II: Cytogenetic and mitochondrial DNA analyses demonstrate karyotype differentiation and its evolutionary direction in C. riggenbachi. Cytogenet Genome Res 115:70–83
Yu X, Zhou T, Li Y, Li K, Zhou M (1989) Chromosomes of Chinese fresh-water fishes. Science Press, Beijing
Acknowledgments
We thank V. Šlechtová Jr. (Institute of Animal Physiology and Genetics, Liběchov, Czech Republic) and K. Udomritturuj (AquariCorp, Bangkok, Thailand) for their help in the field and K. Saitoh (Tohoku National Fisheries Research Institute, Miyagi, Japan) for his comments on the manuscript. This study was supported by grants no. 206/05/2556 and 206/00/0668 of the Grant Agency of the Czech Republic, grants S5045111 and IAA600450508 of the Grant Agency of the Academy of Sciences of the Czech Republic, and by the IRP IAPG No. AV0Z50450515. The German National Academic Foundation supported M.V.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Bohlen, J., Völker, M., Rábová, M. et al. Note on the banded karyotype of the enigmatic South Asian loach Vaillantella maassi (Cypriniformes: Vaillantellidae). Ichthyol Res 55, 82–84 (2008). https://doi.org/10.1007/s10228-007-0007-0
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10228-007-0007-0