Chromosome Research

, Volume 1, Issue 1, pp 53–61 | Cite as

Aneuploidy, structural chromosome changes, and DNA amounts in the annual taxa of theHaplopappus spinulosus complex

  • R. C. Jackson
  • C. F. Crane
  • J. S. Johnston
  • J. R. Ellison
  • H. J. Price
Research Papers


Haplopappus gracilis (n=2),Haplopappus revenil (n=4), andHaplopappus wigginsii (n=4) are isolated by F1 hybrid sterility due mainly to translocation heterozygosity. There is no evidence that this can be overcome at the diploid level so that introgression can occur among them. They are also separated geographically, but occasional populations ofH. gracilis andH. ravenil may be brought together along roadways to form sterile hybrids. There were no statistically significant differences in nuclear DNA content among the same or structurally different aneuploidn=2 andn=3 chromosome races or ecotypes ofH. gracilis. Some of theH. gracilis races were not significantly different from one race of the ancestralH. ravenii, and these samples of both species were from plants growing on poor soils in contrast to accessions from normal habitats. How much and which classes of DNA in these species are subject to changes induced by environmental effects is not known. There were no correlations between DNA amounts and altitude, latitude, and longitude.H. wigginsii had a greater amount of DNA per nucleus than eitherH. ravenii orH. gracilis, and its increased DNA content may reflect a more rapid accumulation of noncoding sequences due to facultative self-compatibility not found in the other two species.

Key words

aneuploidy DNA content inversion translocation 


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  1. Bennett MD (1985) Intraspecific variation in DNA amount and the nucleotypic dimension in plant genetics. In: Freeling M, ed.Plant Genetics. New York: Alan R. Liss, Inc., 283–302.Google Scholar
  2. Bennett ST, Bennett MD (1992) Variation in nuclear DNA amounts between wild and cultivated populations ofMilium effusum (2n=28).Genome 35: 1050–1053.Google Scholar
  3. Bretting PK, Goodman MM (1989) Karyotypic variation in Mesoamerican races of maize and its systematic significance.Econ Bot 43: 107–124.Google Scholar
  4. Cullis C, Cleary W (1985) Fluidity of the flax genome. In: Freeling M, ed.Plant Genetics. New York: Alan R. Liss. Inc., 303–310.Google Scholar
  5. Cullis C, Cleary W (1986) Rapidly varying DNA sequences in flax.Can J Genet Cytol 28: 252–259.Google Scholar
  6. Darlington CD (1937)Recent Advances in Cytology, 2nd edn. Philadelphia: Blakiston CO.Google Scholar
  7. Dickenson EE, Arumuganthan K, Kresovitch S, Doyle JJ (1992) Nuclear DNA content variation within the Rosaceae.Am J Bot 79: 1081–1086.Google Scholar
  8. Freiley KJ (1988). Allozyme and quantitative life history variation among populations and ecological races ofHaplopappus gracilis. PhD Dissertation. Texas Tech University.Google Scholar
  9. Jackson RC (1957) New low chromosome number for plants.Science 25: 1115–1116.Google Scholar
  10. Jackson RC (1959) A study of meiosis inHaplopappus gracilis.Am J Bot 46: 550–554.Google Scholar
  11. Jackson RC (1960) Supernumeray chromosomes inHaplopappus gracilis.Evolution 14: 135.Google Scholar
  12. Jackson RC (1962) Interspecific hybridization inHaplopappus and its bearing on chromosome evolution in theBlepharodon section.Am J Bot 49: 119–132.Google Scholar
  13. Jackson RC (1963) Variation in the short arm of chromosome B ofHaplopappus gracilis.Can J Genet Cytol 5: 421–426.Google Scholar
  14. Jackson RC (1964) Preferential segregation of chromosomes from a trivalent inHaplopappus gracilis.Science 145: 511–513.Google Scholar
  15. Jackson RC (1965) A cytogenetic study of a three-paired race ofHaplopappus gracilis.Am J Bot 52: 946–953.Google Scholar
  16. Jackson RC (1973) Chromosomal evolution inHaplopappus gracilis: A centric transposition race.Evolution 27: 243–256.Google Scholar
  17. Jackson RC (1985) Genomic differentiation and its effect on gene flow.Syst Bot 10: 391–405.Google Scholar
  18. Jackson RC (1988) A quantitative cytogenetic analysis of an intersectional hybrid inHelianthus (Compositae).Am J Bot 75: 609–614.Google Scholar
  19. Jackson RC, Crovello TJ (1970) A comparison of numerical and biosystematic studies inHaplopappus.Brittonia 23: 54–70.Google Scholar
  20. Jackson RC, Dimas CT (1981) Experimental evidence for the systematic placement of theHaplopappus phyllocephalus complex (Compositae).Syst Bot 6: 8–14.Google Scholar
  21. Michaelson MJ, Price HJ, Ellison JR, Johnston JS (1991a) Comparison of plant DNA contents determined by Feulgen microspectrophotometry and laser flow cytometry.Am J Bot 78: 183–188.Google Scholar
  22. Michaelson MJ, Price HJ, Johnston JS, Ellison JR (1991b) Variation of nuclear DNA content inHelianthus annuus (Asteraceae).Am J Bot 78: 1238–1243.Google Scholar
  23. Price HJ (1988) Nuclear DNA content variation within and among angiosperm species.Evol Trends Plants 2: 53–60.Google Scholar
  24. Price HJ, Chambers KL, Bachman K, Riggs J (1983) Inheritance of nuclear 2C DNA content variation in intraspecific hybrids ofMicroseris (Asteraceae).Am J Bot 70: 1133–1138.Google Scholar
  25. Pritchard E (1968) A cytogenetic study of supernumerary chromosomes inHaplopappus gracilis.Can J Cytol Genet 10: 928–936.Google Scholar
  26. Rayburn AL (1990) Genome size variation inZea mays ssp.mays adapted to different altitudes.Theor Appl Genet 79: 470–474.Google Scholar
  27. Rayburn AL, Price HJ, Smith JD, Gold JR (1985) C-banded heterochromatin and DNA content inZea mays.Am J Bot 72: 1610–1617.Google Scholar
  28. Riven CJ, Cullis CA, Walbot V (1986) Evaluating quantitative variation in the genome ofZea mays.Genetics 113: 1009–1019.Google Scholar
  29. Spohn RT (1978) Variability inHaplopappus gracilis (Compositae) and related species. PhD dissertation. Texas Tech University.Google Scholar
  30. Tito CM, Poggio L, Naranjo CA (1991) Cytogenetic studies of the genusZea.Theor Appl Genet 83: 58–64.Google Scholar
  31. Walbot V, Cullus C (1983) The plasticity of the plant genome—is it a requirement for success?Plant Mol Biol Rep 1: 3–11.Google Scholar
  32. Walbot V, Cullis C (1985) Rapid genome change in higher plants.Annu Rev Plant Physiol 36: 367–396.Google Scholar

Copyright information

© Rapid Communications of Oxford Ltd 1993

Authors and Affiliations

  • R. C. Jackson
    • 1
  • C. F. Crane
    • 2
  • J. S. Johnston
    • 3
  • J. R. Ellison
    • 4
  • H. J. Price
    • 2
  1. 1.the Department of Biological SciencesTexas Tech UniversityLubbockUSA
  2. 2.the Department of Soil & Crop SciencesTexas A & M UniversityCollege StationUSA
  3. 3.the Department of EntomologyTexas A & M UniversityCollege StationUSA
  4. 4.the Department of Biochemistry and BiophysicsTexas A & M UniversityCollege StationUSA

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