Chromosoma

, Volume 26, Issue 1, pp 35–40 | Cite as

Microchromosomes in holocephalian, chondrostean and holostean fishes

  • S. Ohno
  • J. Muramoto
  • C. Stenius
  • L. Christian
  • W. A. Kittrell
  • N. B. Atkin
Article

Abstract

Chondrostean and holostean fish of today are leftover relics: they share some characteristics with the venturesome crossopterygian fish, which launched the evolution of terrestrial vertebrates about 280 million years ago. The chromosome complements and DNA values of one chondrostean and two holostean species as well as one holocephalian species were studied. Their DNA values varied from 37% to 50% of that of mammals, and three of the species contained dot-like microchromosomes in their diploid complements. Their genome size and karyological characteristics are quite similar to those possessed by one group of reptiles and by avian species.

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References

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Copyright information

© Springer-Verlag 1969

Authors and Affiliations

  • S. Ohno
    • 1
  • J. Muramoto
    • 1
  • C. Stenius
    • 1
  • L. Christian
    • 1
  • W. A. Kittrell
    • 1
  • N. B. Atkin
    • 2
  1. 1.Department of BiologyCity of Hope Medical CenterDuarteUSA
  2. 2.Department of Cancer Research MountVernon HospitalNorthwoodEngland

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