Full text in pdf format

Cytogenetic studies of three species of Glandulocaudinae (Pisces, Characiformes, Characidae)

lzolda Nunes Guimarães^I; Lurdes Foresti de Almeida-Toledo^II; Claudio Oliveira^III; Fausto Foresti^III; Silvio de Almeida Toledo Filho^II

^IDepartamento de Biologia, UFBA, Salvador, BA, Brasil
^IIDepartamento de Biologia/Genética, IB, USP, São Paulo, SP, Brasil
^IIIDepartamento de Morfologia, IB, UNESP, 18618-000 Botucatu, SP, Brasil. Send correspondence to C.O.

ABSTRACT

Cytogenetic studies of three species of the subfamily Glandulocaudinae showed that Mimagoniates microlepis presents 2n=52 chromosomes (6M+20SM+18ST+8A), Mimagoniates lateralis presents 2n=52 chromosomes (6M+20SM+16ST+10A) and Glandulocauda melanogenys presents 2n=52 chromosomes (4M+12SM+22ST+14A). The number of NOR-bearing chromosome pairs ranged from two to four. Differences in number and position of NORs at the species and population levels were detected, suggesting that several chromosome rearrangements occurred in the evolutionary process of this group. Some aspects related to the chromosome evolution of the Glandulocaudinae are discussed.

Keywords: cytogenetic; Glandulocaudinae.

REFERENCES

Amemiya, C.T. and Gold, J.R. (1988). Chromosomal NORs as taxonomic and systematic characters in North American cyprinid fishes. Genetica 76: 81-90.

Andreata, A.A., Almeida-toledo, L.F., Oliveira, C. and Toledo-Filho, S.A. (1993). Chromosome studies in Hypoptopomatine (Pisces, Siluriformes, Loricariidae): II. ZZ/ZW sex-chromosome system, B chromosomes, and constitutive heterochromatin differentiation in Microlepidogaster leucofrenatus. Cytogenet. Cell Genet. 63: 215-220.

Andreata, A.A., Almeida-Toledo, L.F., Oliveira, C. and Toledo-Filho, S.A. (1994). Cytogenetic studies in Hypoptopomatine (Pisces, Siluriformes, Loricariidae): III. Analysis of seven species. Caryologia 47: 27-37.

Bertollo, L.A.C. and Cavallaro, Z.I. (1992). A highly differentiated ZZ/ZW sex chromosome system in a Characidae fish, Triportheus guentheri. Cytogenet. Cell Genet. 50: 60-63.

Falcão, J.N. (1988). Caracterização cariotípica em peixes do gênero Triportheus (Teleostei, Characiformes, Characidae). Doctoral Thesis, Departamento de Genética e Matemática Aplicada à Biologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP.

Galetti, Jr., P.M., Foresti, F., Bertollo, L.A.C. and Moreira-Filho, O. (1984). Characterization of eight species of Anostomidae (Cyprimiformes) fish on the basis of the nucleolar organizing region. Caryologia 37: 401-406.

Howell, W.M. and Black, D.A. (1980). Controlled silver staining of Nucleolus Organizer Regions with a protective colloidal developer: a 1-step method. Experientia 36: 1014-1015.

Levan, A., Fredga, K. and Sandberg, A.A. (1964). Nomenclature for centromeric position on chromosomes. Hereditas 52: 201-220.

Morelli, S., Bertollo, L.A.C., Foresti, F., Moreira-Filho, O. and Toledo-Filho, S.A. (1983). Cytogenetic considerations of the genus Astyanax (Pisces, Characidae). I. Karyotypic variability. Caryologia 36: 235-244.

Nelson, J.S. (1994). Fishes of the World. John Wiley & Sons, Inc., New York, 3rd edn., pp. 600.

Oliveira, C., Almeida-Toledo, L.F., Foresti, F., Britski, H.A. and Toledo-Filho, S.A. (1988a). Chromosome formulae of Neotropical freshwater fishes. Rev. Brasil. Genet. 11: 577-624.

Oliveira, C., Almeida-Toledo, L.F. and Toledo-Filho, S.A. (1988b). Supranumerary chromosomes, Robertsonian rearrangements and multiple NORs in Corydoras aeneus (Pisces, Siluriformes, Callichthyidae). Caryologia 41: 227-236.

Oliveira, C., Almeida-Toledo, L.F. and Toledo-Filho, S.A. (1990). Occurrence of three cytotypes in Corydoras nattereri (Pisces, Siluriformes, Callichcthyidae). Caryologia 51: 21-26.

Oliveira, C., Almeida-Toledo, L.F., Mori, L. and Toledo-Filho, S.A. (1993). Cytogenetic and DNA content studies of armoured catfishes of the genus Corydoras (Pisces, Siluriformes, Callichcthyidae) from the southeast coast of Brazil. Rev. Brasil. Genet. 16: 617-629.

Portela, A.L.B.S. (1987). Citogenética de peixes da subfamília Tetragonopterinae (Characidae). Master's Thesis, Departamento de Genética e Matemática Aplicada à Biologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP.

Scheel, J.J. (1973). Fish chromosomes and their evolution. Internal Report of Denmarks Akvarium, Charlottenlund, Denmark, pp. 22.

Venere, P.C. and Galetti Jr., P.M. (1989). Chromosome evolution and phylogenetic relationships of some neotropical Characiformes of the family Curimatidae. Rev. Brasil. Genet. 12: 17-25.

Weitzman, S.H., Menezes, N.A. and Weitzman, M.J. (1988). Phylogenetic biogeography of the Glandulocaudini (Teleostei: Characiformes, Characidae) with comments on the distributions of other freshwater fishes in eastern and southeastern Brazil. In: Proceedings of a Workshop on Neotropical Distribution Patterns (Heyer, W.R. and Vanzolini, P.E., eds.). Academia Brasileira de Ciências, Rio de Janeiro, pp. 379-427.