Advertisement

The association of non-homologous parts of chromosomes in the mid-prophase of meiosis in zea mays

  • Barbara McClintock
Article

Summary

  1. 1.

    Association of chromosomes at pachytene in Zea mays is 2-by-2 whether or not the parts associated are homologous.

     
  2. 2.

    Evidence for non-homologous association of parts of chromosomes has been obtained from monoploids, diploids, monosomics, trisomics, deficiencies, inversions, translocations, ring-shaped chromosomes, “asynaptic” plants and so-called “B-type” chromosomes.

     
  3. 3.

    In many cases, the non-homologous association at pachytene appears to be as intimate as homologous association.

     
  4. 4.

    Non-homologous association, present at pachytene, rarely continues into diakinesis.

     
  5. 5.

    Translocations probably result from the association of non-homologous parts of chromosomes.

     

Keywords

Normal Chromosome Spindle Fiber Univalent Chromosome Homologous Part Text Figure 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. Belling, J.: The attachment of chromosomes at the reduction division in flowering plants. J. Genet.18 177–205 (1927).Google Scholar
  2. Brink, R. A. andD. C. Cooper: Cytological evidence for segmental interchange between non-homologus chromosomes in maize. Proc. nat. Acad. Sci. U.S.A.17, 334–338 (1931).CrossRefGoogle Scholar
  3. Burnham, C. R.: An interchange in maize giving low sterility and chain configurations. Proc. nat. Acad. Sci. U.S.A.18, 434–440 (1932a).CrossRefGoogle Scholar
  4. —: The association of non-homologous parts in a chromosomal interchange in maize. Proc. 6. internat. Congr. Genetics2, 19–20 (1932b).Google Scholar
  5. Clausen, R. E.: Inheritance inNicotiana tabacum. X. Carminecoral variegation. Cytologia1, 358–368 (1930).Google Scholar
  6. —: Inheritance inNicotiana tabacum. XI. The fluted assemblage. Amer. Naturalist65, 316–331 (1931a).CrossRefGoogle Scholar
  7. —: Inheritance inNicotiana tabacum. XII. Transmission features of carmine-coral variegation. Z. Züchtg, A. Pflanzenzüchtg17, 108–115 (1931b).Google Scholar
  8. Creighton, H. B. andB. McClintock: Cytological evidence for 4-strand crossing over inZea mays. Proc. 6. internat. Congr. Genetics2, 392 (1932).Google Scholar
  9. Frost, H. B.: Chromosome-mutant types in stocks (Matthiola incana R. Br.). I. Characters due to extra chromosomes. J. Hered.18, 475–486 (1927).Google Scholar
  10. —: Trisomic inheritance of doubleness, complicated by lethals, inMatthiola incana. Proc. nat. Acad. Sci. U.S.A.17, 499 to 509 (1931).Google Scholar
  11. Frost, H. B. andM. C. Mann: Mutant forms inMatthiola resulting from non-disjunction. Amer. Naturalist58, 569–572 (1924).CrossRefGoogle Scholar
  12. Lesley, M. M. andH. B. Frost: Two extreme “small”Matthiola plants: A haploid with one and a diploid with two additional chromosome fragments. Amer. Naturalist62, 22 to 33 (1928).CrossRefGoogle Scholar
  13. Lesley, J. W. andM. M. Lesley: Chromosome fragmentation and mutation in tomato. Genetics14, 321–336 (1929).PubMedGoogle Scholar
  14. McClintock, B.: A cytological demonstration of the location of an interchange between two non-homologous chromosomes inZea mays. Proc. nat. Acad. Sci. U.S.A.16, 791–796 (1930).CrossRefGoogle Scholar
  15. —: Cytological Observations of deficiencies involving known genes, translocations and an inversion inZea mays. Missouri Agricult exper. Stat. Bull163, 1–30 (1931).Google Scholar
  16. —: 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. 6. internat. Congr. Genetics2, 126–128 (1932a).Google Scholar
  17. —: A correlation of ring-shaped chromosomes with variegation inZea mays. Proc. nat. Acad. Sci. U.S.A.18, 677–681 (1932b).CrossRefGoogle Scholar
  18. McClintock, B. andH. E. Hill: The cytological identification of the chromosome associated with theR-g linkage group inZea mays. Genetics16, 175–190 (1931).PubMedGoogle Scholar
  19. Newton, W. C. F. andC. D. Darlington: Meiosis in polyploids. I. Triploid and pentaploid tulips. J. Genet.21, 1–15 (1929).Google Scholar
  20. Philp, J. andC. L. Huskins: The cytology ofMatthiola incana R. Br. especially in relation to the inheritance of double flowers. J. Genet.24, 359–404 (1931).CrossRefGoogle Scholar
  21. Randolph, L. F.: Types of supernumerary chromosomes in maize. Anat. Rec.41, 102 (1928).Google Scholar
  22. Rhoades, M. M.: The genetic demonstration of double strand crossing-over inZea mays. Proc. nat. Acad. Sci. U.S.A.18, 481–484 (1932).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1933

Authors and Affiliations

  • Barbara McClintock
    • 1
    • 2
  1. 1.University of MissouriMissouriUSA
  2. 2.California Institute of TechnologyCaliforniaUSA

Personalised recommendations