Journal of Genetics

, 27:243 | Cite as

The relation between chiasmata and crossing-over in diploid and triploidDrosophila melanogaster

  • K. Mather


Various genetical data on diploid and triploidDrosophila melanogaster are analysed from a cytological point of view.

It is shown that the frequencies of crossing-over in the diploid agree with the cytologically observed frequencies of chiasma formation and persistence in other organisms, so lending support to the partial chiasma-type hypothesis. The various types of interference are discussed.

The behaviour of the chromosomes at pachytene (synapsis) in the triploid is deduced and it is shown to agree with the cytologically observed behaviour of chromosomes in certain plants. It is also shown that non-random disjunction of the chromosomes may occur in a triploid and its genetical consequences are pointed out.


  1. Belling, J. (1931). “Chiasmas in flowering plants.”Univ. Calif. Pub. Bot. 16, 311–38.Google Scholar
  2. Bridges, C. B. andAnderson, E. G. (1925). “Crossing-over in theX-chromosomes of triploid females ofDrosophila melanogaster.”Genetics,10, 418–41.PubMedGoogle Scholar
  3. Bridges, C. B. andMorgan, T. H. (1923). “The third group of mutant characters ofDrosophila melanogaster.”Pub. Carneg. Inst. Wash. 327.Google Scholar
  4. Darlington, C. D. (1929). “Meiosis in polyploids. II.”Journ. Gen. 21, 17–56.CrossRefGoogle Scholar
  5. —— (1931). “Meiosis in diploid and tetraploidPrimula sinensis.” Ibid.24, 65–96.CrossRefGoogle Scholar
  6. —— (1932).Recent advances in cytology. London (Churchill).Google Scholar
  7. Darlington, C. D. andDark, S. O. S. (1932). “The origin and behaviour of chiasmata. II.Stenobothrus parallelus.”Cytologia,3, 169–85.Google Scholar
  8. Darlington, C. D. andMather, K. (1932). “The origin and behaviour of chiasmata. III. TriploidTulipa.” Ibid.4, 1–15.Google Scholar
  9. Haldane, J. B. S. (1931). “The cytological basis of genetical interference.” Ibid.3, 54–65.Google Scholar
  10. McClintock, B. (1932). “Cytological observations inZea on the intimate association of non-homologous parts of chromosomes in the mid-prophase of meiosis and its relation to diakinesis configurations.”Proc. Sixth Int. Cong. Genet. pp. 126–8.Google Scholar
  11. Newton, W. C. F. andDarlington, C. D. (1929). “Meiosis in polyploids. I.”Journ. Gen. 21, 1–16.CrossRefGoogle Scholar
  12. O’Mara, J. (1931). “Chromosome pairing inYucca flaccida.”Cytologia,3, 66–76.Google Scholar
  13. Redfield, H. (1930). “Crossing-over in the third chromosomes of triploids ofDrosophila melanogaster.”Genetics,15, 205–52.PubMedGoogle Scholar
  14. —— (1932). “A comparison of triploid and diploid crossing-over for chromosome II ofDrosophila melanogaster.” Ibid.17, 137–52.PubMedGoogle Scholar
  15. Sansome, F. W. (1933). “Chromatid segregation inSolanum Lycopersicum.”Journ. Gen. 27, 105–26.CrossRefGoogle Scholar
  16. Sansome, F. W. andPhilp, J. (1932).Recent advances in plant genetics. London (Churchill).Google Scholar
  17. Sax, K. (1930). “Chromosome structure and the mechanism of crossing-over.”Journ. Arnold Arbor. 11, 193–220.Google Scholar
  18. —— (1932). “The cytological mechanism of crossing-over.” Ibid.13, 180–212.Google Scholar
  19. Stern, C. (1931). “Zytologisch-genetische Untersuchungen als Beweise für die Morgansche Theorie des Faktorenaustausches.”Biol. Zbl. 51, 81–121.Google Scholar
  20. Stone, L. H. A. andMather, K. (1932). “The origin and behaviour of chiasmata. IV. Diploid and triploidHyacinthus.”Cytologia,4, 16–25.Google Scholar

Copyright information

© Indian Academy of Sciences 1933

Authors and Affiliations

  • K. Mather
    • 1
  1. 1.John Innes Horticultural InstitutionMerton

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