Chromosome Research

, Volume 8, Issue 7, pp 627–634 | Cite as

Frequency increase and mitotic stabilization of a B chromosome in the fish Prochilodus lineatus

  • Z. I. Cavallaro
  • L. A. C. Bertollo
  • F. Perfectti
  • J. P. M. Camacho


Six populations of the fish Prochilodus lineatus were analysed for B chromosome frequency. A study of spermatogenesis revealed the absence of B accumulation during the stages analysed. In one of the populations, from the Mogi-Guaçu river where samples have been analysed over a ten-year period, B chromosome frequency doubled between 1979–80 and 1987–89, whereas no additional changes were noticed in samples collected in 1991–92. The analysis of B chromosome mitotic instability, manifested by intraindividual variation in B chromosome number, indicated a very significant decrease during this time period. This suggests that, in the 1980s, this population was in the final stage of B chromosome invasion, and that there was a possible causal relationship between B mitotic instability and the accumulation mechanism that caused its frequency increase. Mitotic stabilization might thus be a way by which a mitotically unstable B chromosome may become neutralized.

B chromosome drive mitotic instability neutralization parasite chromosome Prochilodus lineatus 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bertollo LAC, Takahashi CS, Moreira-Filho O (1978) Cytotaxonomic considerations on Hoplias lacerdae (Pisces, Erythrinidae). Rev Brasil Genet 1: 103–120.Google Scholar
  2. Camacho JPM, Shaw MW, López-León MD, Pardo MC, Cabrero J (1997) Population dynamics of a selfish B chromosome neutralized by the standard genome in the grasshopper Eyprepocnemis plorans. Am Nat 149: 1030–1050.Google Scholar
  3. Camacho JPM, Sharbel TF, Beukeboom LW (2000) B chromosome evolution. Phil Trans R Soc B 355 163–178.Google Scholar
  4. Cavallaro Z (1992) Estudos Comparativos Sobre os Cromosomos B de Prochilodus scrofãSteindachner, 1881 (Pises, Prochilodontidae) de Diferentes Localidades. Master's Thesis. Universidade Federal de São Carlos, São Carlos, SP, Brazil.Google Scholar
  5. Godoy MP De (1975) Peixes do Brasil-Sub-Ordem Characoidei. Bacia do Rio Mogi-Guaçu, Vol. IV. Editora Franciscana, Piracicaba.Google Scholar
  6. Jones RN (1985) Are B chromosomes selfish? In: Cavalier-Smith T, ed. The Evolution of Genome Size. London: Wiley, pp 397–425.Google Scholar
  7. Jones RN (1991) B-chromosome drive. Am Nat 137: 430–442.Google Scholar
  8. Kayano H (1971) Accumulation of B chromosomes in the germ line of Locustãmigratoria. Heredity 27: 119–123.Google Scholar
  9. Nur U (1966) Harmful B chromosomes in a mealy bug population. Genetics 54: 1225–1238.Google Scholar
  10. Nur U (1969) Mitotic instability leading to an accumulation of B-chromosomes in grasshoppers. Chromosoma 27: 1–19.Google Scholar
  11. Nur U (1977) Maintenance of a “parasitic” B chromosome in the grasshopper Melanoplus femur-rubrum. Genetics 87: 499–512.Google Scholar
  12. Oliveira C, Rodrigues Saboya SM, Foresti F, Senhorini JA, Bernardino G (1997) Increased B chromosome frequency and absence of drive in the fish Prochilodus lineatus. Heredity 79: 473–476.Google Scholar
  13. Östergren G (1945) Parasitic nature of extrafragment chromosomes. Bot Notiser 2: 157–163.Google Scholar
  14. Pardo MC, López-León MD, Cabrero J, Camacho JPM (1994) Transmission analysis of mitotically unstable B chromosomes in Locustamigratoria. Genome 37: 1027–1034.Google Scholar
  15. Pauls E, Bertollo LAC (1983) Evidence for a system of supernumerary chromosomes in Prochilodus scrofa Steindachner, 1881 (Pisces, Prochilodontidae). Caryologia 36: 307–314.Google Scholar
  16. Sumner AT (1972) A simple technique for demonstrating centromeric heterochromatin. Exp Cell Res 74: 304–306.Google Scholar
  17. Toledo Filho SA, Godoy MP de, Santos EP de (1986) Curva de migração do curimbatá, Prochilodus scrofa (Pisces, Prochilodontidae) na bacia superior do Rio Paraná, Brasil. Rev Brasil Biol 46: 447–452.Google Scholar
  18. Viseras E, Camacho JPM, Cano MI, Santos JL (1990) Relationship between mitotic instability and accumulation of B chromosomes in males and females of Locusta migratoria. Genome 33: 23–29.Google Scholar
  19. Werren JH, Nur U, Eickbush DG(1987) An extrachromosomal factor causing loss of paternal chromosomes. Nature 327: 75–76.Google Scholar
  20. Zurita S, Cabrero J, López-León MD, Camacho JPM (1998) Polymorphism regeneration for a neutralized selfish B chromosome. Evolution 52: 274–277.Google Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Z. I. Cavallaro
    • 1
  • L. A. C. Bertollo
    • 1
  • F. Perfectti
    • 2
  • J. P. M. Camacho
    • 2
  1. 1.Depto. de Genética e EvoluçãoUniversidade Federal de São CarlosSão Carlos, SPBrazil
  2. 2.Departamento de GenéticaUniversidad de GranadaGranadaSpain

Personalised recommendations