Advertisement

Journal of Genetics

, 55:218 | Cite as

The conditions for coadaptation in polymorphism for inversions

  • J. B. S. Haldane
Article

Summary

Criteria are found for the stability of a balanced polymorphism due to chromosomal inversions in autosomes. Roughly speaking, it is necessary that heterosis should be cumulative, that is to say that heterozygosis at any locus concerned in the genetical polymorphism should have a greater effect in raising fitness when the other loci concerned are heterozygous than when they are homozygous. The conditions when one inversion carries a sex-determining mechanism are much less stringent. Here a single gene may be enough to make an inversion selectively advantageous.

Keywords

Chromosomal Inversion Inverted Segment Chromosomal Section Fitness Fitness Inadequate Food Supply 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Acton, A. B. (1957). Chromosomal polymorphism inChironomus.J. Genet. 55, 61–94.Google Scholar
  2. Beermann, W. (1955). Geschlechtsbestimmung und Evolution der genetischen Y-Chromosomen beiChiranomus.Biol. Zbl. 74, 525.Google Scholar
  3. Brncic, D. (1954). Heterosis and the integration of the genotype in geographic populations ofDrosophila pseudoobscura.Genetics,39, 77.PubMedGoogle Scholar
  4. Dobzhansky, Th. (1947). Genetics of natural populations. XIV. A response of certain gene arrangements in the third chromosome ofDrosophila subobscura to natural selection.Genetics,32, 142.PubMedGoogle Scholar
  5. Dobzhansky, Th. &Pavlovsky, O. (1953). Indeterminate outcome of certain experiments inDrosophila populations.Evolution,7, 198.CrossRefGoogle Scholar
  6. Dobzhlansky, Th. &Pavlovsky, O. (1955). An extreme case of heterosis in a Central American population ofDrosophila tropicalis.Proc. Nat Acad. Sci., Wash.,41, 289.CrossRefGoogle Scholar
  7. Maynard Smith, J. &Maynard Smith, S. (1954). Generics and cytology ofDrosophila subobscura. VII. Heterozygosity, viability and rate or development.J. Genet. 52, 152.CrossRefGoogle Scholar
  8. Penrose, L. S. (1955). Evidence of heterosis in man.Proc. Roy. Soc. B,144, 203.Google Scholar
  9. Spurway, H. &Philip, U. (1952). Genetics and cytology ofDrosophila subobscura. VII. Abnormal gene arrangements in element A.J. Genet. 51, 198.Google Scholar
  10. Wallace, B. (1953). On coadaptation inDrosophila.Amer. Nat. 87, 343.CrossRefGoogle Scholar
  11. Wright, S. (1949). Adaptation and selection. InGenetics, paleontology, and evolution. (Princeton.)Google Scholar

Copyright information

© Indian Academy of Sciences 1957

Authors and Affiliations

  • J. B. S. Haldane
    • 1
  1. 1.Department of BiometryUniversity College LondonLondon

Personalised recommendations