Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-24T13:24:26.475Z Has data issue: false hasContentIssue false
  • English
  • Français

Cytological observations on a duck hybrid: Anas clypeata × Anas penelope

Published online by Cambridge University Press:  14 April 2009

B. M. Slizynski
B. M. Slizynski
Affiliation:
Institute of Animal Genetics, Edinburgh University
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The chromosomes of the two parental forms and those of the hybrid do not show any detectable numerical or large structural differences. The pairing in the hybrid is frequently abnormal in that both free ends (highly charged with stainable substances) of many chromosomes show strong pairing, while midsegments repel each other. This partial failure of paring suggests that in the two parental forms gene mutations rather than chromosomal structural changes are responsible for incipient divergence.

It is suggested that the stainable substance of the chromosomes acts as a carrier mechanism ensuring orderly pairing, segregation and numerical constancy of bivalents in the hybrid where the partner chromosomes have become partly non-homologous.

The distinction between long and short chromosomes is typical for the avian karyotype, its evolutionary significance is discussed.

Type
Research Article
Information
Genetics Research , Volume 5 , Issue 3 , November 1964 , pp. 441 - 447
Copyright
Copyright © Cambridge University Press 1964

References

REFERENCES

Crew, F. A. E. & Koller, P. C. (1936). Genetical and cytological studies of the intergeneric hybrid of Cairina moechata and Anas platyrrhynchos. Proc. roy. Soc. Edinb. 56, 210–292.CrossRefGoogle Scholar
Gall, J. G. & Callan, H. G. (1962). H3 uridine incorporation in lampbrush chromosomes. Proc. nat. Acad. Sci., Wash., 48, 562–570.CrossRefGoogle ScholarPubMed
Harrison, J. M. (1959). Comments on wigeon × northern shoveler hybrid. Bull. orn. Club, 79, 142–151.Google Scholar
Harrison, J. M. (1964). Further comments on hybridisation between the European wigeon and northern shoveler. Bull. orn. Club, 84, 30–39.Google Scholar
Matthey, R. (1949). Les Chromosomes des Vertebres. Lausanne.Google Scholar
Matthey, R. & Van Brink, J. (1960). Nouvelle contribution a la cytologie comparee des Chameleontidae. Bull. Soc. vaud. nat. 57, 333–348.Google Scholar
Newcomer, E. H. (1963). The karyotype of the domestic fowl. Genetics Today. Proc. XI Intern. Congr. Genetics. Pergamon Press.Google Scholar
Ohno, S. (1960). Sex chromosomes and microchromosomes of Gallus domesticus. Chromosoma, 11, 484–498.CrossRefGoogle Scholar
Ohno, S., Christian, L. C. & Stentus, Ch. (1962). Nucleolus organizingmicrochromosomes of Gallus domesticus. Exp. Cell. Res. 27, 612–614.CrossRefGoogle ScholarPubMed
Slizynski, B. M. (1964). Chiasmata in Drosophila melanogaster males. Genet. Res. 5, 80–84.CrossRefGoogle Scholar
Sokolowskaja, I. I. (1935). Experiments on hybridisation of birds. Z. Zool. 13, 481–496.Google Scholar
Stentus, Ch., Christian, L. C. & Ohno, S. (1963). Comparative cytological study of Phasianus colchicus, Meleagris gallopavo and Gallus domesticus. Chromosoma, 13, 515–520.CrossRefGoogle Scholar
Wahrman, J. & Zahavi, A. (1958). Cytogenetic analysis of mammalian sibling species by means of hybridisation. Proc. X Intern. Congr. Genetics, vol. II, 304–305.Google Scholar
Yamashina, Y. Marq (1941). A revised study of chromosomes of Muscovy duck, domestic duck and their hybrid. Cytologia, 12, 163–169.CrossRefGoogle Scholar