Skip to main content
SpringerLink
Log in

Homologous somatic association in Crepis species: a critical comparison of several statistical approaches

  • Published:
Chromosoma Aims and scope Submit manuscript

Abstract

Somatic association of homologous chromosomes has been quantitatively studied in root tips of Crepis capillaris (2n=6), C. taraxicifolia (2n=8) and C. rubra (2n=10). Statistical analyses have been carried out on scattered metaphase plates. Homologous somatic association has been analyzed by applying two statistical approaches: the method of corrected distances and the method of generalized distances. Their validity and proper utilization are discussed on the basis of a comparison of results obtained when both methods are applied to the same scattered metaphase plates of material of which previous evidence of homologous somatic association had been obtained in radial metaphases. The following conclusions have been drawn: (i) in the case of the method of corrected distances the contradictory results can be attributed to an improper use of the statistical approach since the theoretical model requires the chromosomes (centromeres) to be uniformly distributed throughout a circle, (ii) since the theoretical model of the generalized distance method does not have any requirement, serious doubts about its validity arise from the negative results obtained.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Antunes-Correia, J.C.: Somatic association in BHK21 homosynkaryons. Heredity 28, 357–362 (1972)

    Google Scholar 

  • Avivi, L., Feldman, M., Bushuk, W.: The mechanism of somatic association in common wheat, Triticum aestivum L.I. Suppression of somatic association by colchicine. Genetics 62, 745–752 (1969)

    Google Scholar 

  • Brown, W.V., Stack, S.M.: Somatic pairing as a regular preliminary to meiosis. Bull. Torrey Bot. Club 95, 369–378 (1968)

    Google Scholar 

  • Comings, D.E.: The rationale for an ordered arrangement of chromatin in the interphase nucleus. Amer. J. hum. Genet. 20, 440–460 (1968)

    Google Scholar 

  • Darvey, N.L., Driscoll, C.J.: Evidence against somatic association in hexaploid wheat. Chromosoma (Berl.) 36, 140–149 (1972)

    Google Scholar 

  • Defrise-Gussenhoven, E.: Generalized distance in genetic studies. Acta Genet. med. Gemell. 17, 275–288 (1967)

    Google Scholar 

  • Deltheil, R.: Probabilités Géometriques. Paris: Gauthier-Villars 1926

    Google Scholar 

  • Dubuc, J.P., McGinnis, R.C.: Somatic association in Avena sativa L. Science 167, 999–1000 (1970)

    Google Scholar 

  • DuPraw, E.J.: DNA and chromosomes. New York: Holt, Rinehart and Winston 1970

    Google Scholar 

  • Dvorak, J., Knott, D.R.: A study of somatic association of wheat chromosomes. Canad. J. Genet. Cytol. 15, 411–416 (1973)

    Google Scholar 

  • Fedak, G., Helgason, S.B.: Somatic association of chromosomes in barley. Canad. J. Genet. Cytol. 12, 496–500 (1970)

    Google Scholar 

  • Feldman, M., Avivi, L.: Non-random arrangement of chromosomes in common wheat. In: Chromosomes today, 4, 187–196 (1973a)

    Google Scholar 

  • Feldman, M., Avivi, L.: The pattern of chromosomal arrangement in nuclei of common wheat and its genetic control. Proc. 4th Internat. Wheat Genet. Symp. Missouri Agr. Exp. Sta., Columbia, Mo., 675–684 (1973b)

  • Feldman, M., Mello-Sampayo, T., Avivi, L.: Somatic association of homoeologous chromosomes in Triticum aestivum. Chromosoma (Berl.) 37, 209–222 (1972)

    Google Scholar 

  • Feldman, M., Mello-Sampayo, T., Sears, E.R.: Somatic association in Triticum aestivum. Proc. nat. Acad. Sci. (Wash.) 56, 1192–1199 (1966)

    Google Scholar 

  • Ferrer, E., Lacadena, J.R.: Homologous somatic association in radial metaphases of Crepis species. Chromosoma (Berl.) 64, 25–36 (1977)

    Google Scholar 

  • Fox, D.P., Mello-Sampayo, T., Carter, K.C.: Chromosome distribution in neuroblast metaphase cells of Locusta migratoria L. Chromosoma (Berl.) 53, 321–333 (1975)

    Google Scholar 

  • Galperin, H.: Comparative study of the association of human acrocentic chromosomes in male and female mitoses. Cytogenetics 7, 447–454 (1968)

    Google Scholar 

  • Galperin, H.: Number of each type of acrocentric association and probability of its occurrence in human male and female metaphase cells. Cytogenetics 8, 439–446 (1969)

    Google Scholar 

  • Grell, R.F.: Meiotic and somatic pairing. In: Genetic organization. A comprehensive treatise (E.W. Caspari and A.W. Ravin, eds.), vol. 1, 361–492. New York: Academic Press 1969

    Google Scholar 

  • Hammersley, J.M.: The distribution of distance in a hypersphere. Ann. Math. Statistics 21, 447–452 (1950)

    Google Scholar 

  • Lacadena, J.R., Ferrer, E., Yañez, I.: A new approach to quantitative analysis of somatic association. Cytogenet. Cell Genet. 18, 320–326 (1977)

    Google Scholar 

  • Lacadena, J.R., Puertas, M.J.: Secondary association of bivalents in an allohexaploid, Aegilops triaristata Willd. 6 x. Genét. Ibér. 21, 191–209 (1969)

    Google Scholar 

  • Lord, R.D.: The distribution of distance in a hypersphere. Ann. Math. Statistics 25, 794–798 (1954)

    Google Scholar 

  • Mello-Sampayo, T.: Somatic association of telocentric chromosomes carrying homologous centromeres in common wheat. Theoret. appl. Genet. 43, 174–181 (1973)

    Google Scholar 

  • Metz, C.W.: Chromosome studies on the Diptera. II. The paired association of chromosomes in the Diptera and its significance. J. exp. Zool. 21, 213–279 (1916)

    Google Scholar 

  • Sadasivaiah, R.S., Watkins, R., Rajhathy, T.: Somatic association of chromosomes in diploid and hexaploid Avena. Chromosoma (Berl.) 28, 468–481 (1969)

    Google Scholar 

  • Siegel, S.: Nonparametric statistics. New York: McGraw-Hill Book Company, Inc. 1956

    Google Scholar 

  • Singh, R.J., Röbbelen, G., Okamoto, M.: Somatic association at interphase studied by Giemsa banding technique. Chromosoma (Berl.) 56, 265–273 (1976)

    Google Scholar 

  • Spaeter, M.: Nichtzufällige Verteilung homologer Chromosomen (Nr. 9 und YY) in Interphasekernen menschlicher Fibroblasten. Humangenetik 27, 111–118 (1975)

    Google Scholar 

  • Spence, M.A., Luthard, F.W.: Mitotic association patterns of nucleolar organizing chromosomes in the mouse. Cytogenet. Cell Genet. 15, 276–280 (1975)

    Google Scholar 

  • Spence-Campbell, M.A., Forsythe, A.B., Nesbitt, M.: Metaphase distribution of the mouse chromosomes. Chromosoma (Berl.) 39, 289–295 (1972)

    Google Scholar 

  • Stevens, N.M.: A study of the germ cells of certain Diptera, with reference to the heterochromosomes and the phenomena of synapsis. J. exp. Zool. 5, 359–374 (1908)

    Google Scholar 

  • Thomas, H.: Somatic association of chromosomes in asynaptic genotypes of Avena sativa L. Chromosoma (Berl.) 42, 87–94 (1973)

    Google Scholar 

  • Werry, P.P.Th.J., Stoffelsen, K., Engels, F.M., Laan, F. van der, Spanjers, A.W.: The relative arrangement of chromosomes in mitotic interphase and metaphase in Haploppapus gracilis. Chromosoma (Berl.) 62, 93–101 (1977)

    Google Scholar 

  • Yoshida, H., Yamaguchi, H., Takano, Y.: Somatic association of homologous chromosomes in rye. Jap. J. Genet. 49, 45–47 (1974)

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Departamento de Genética, Facultad de Biologia, Universidad Complutense, Madrid, Spain

    J. R. Lacadena & E. Ferrer

Authors
  1. J. R. Lacadena
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. E. Ferrer
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Lacadena, J.R., Ferrer, E. Homologous somatic association in Crepis species: a critical comparison of several statistical approaches. Chromosoma 67, 77–86 (1978). https://doi.org/10.1007/BF00285650

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00285650

Keywords

Search

Navigation