Brittonia

, Volume 35, Issue 4, pp 341–350 | Cite as

Karyotypes of tragopogon (Compositae: Lactuceae)

  • F. Douglas Wilson
Article

Abstract

Karyotypes of 24 diploid (2n=12)Tragopogon species are similar with one long pair of chromosomes (A), two medium-length pairs (B and C), and three short pairs (D, E, and F). These species may be divided into three karyotypic groups: 1) seven species with a satellite on A and on D; 2) 14 species with a satellite on A only; and 3) three species with a satellite on D only. Most species within karyotype groups may be separated from each other either by distinctive features of certain chromosomes or by statistical differences in length of chromosome arms or long arm: short arm ratios of chromosome A. Three tetraploid (2n=24) species had two long pairs (A,A′), four medium-length pairs (B,B′;C,C′), and six short pairs (D,D′;E,E′;F,F′). Suggestions are made as to the putative diploid parents of these presumed allotetraploids.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature Cited

  1. Belzer, N. F. & M. Ownbey. 1971. Chromatographic comparison ofTragopogon species and hybrids. Amer. J. Bot. 58: 791–802.CrossRefGoogle Scholar
  2. Carmer, S. G. & M. R. Swanson. 1971. Detection of differences between means: a Monte Carlo study of five pairwise multiple comparison procedures. Agron. J. 63: 940–945.CrossRefGoogle Scholar
  3. Chadvarov, L. P. & G. N. Georgiev. 1973. Karyological study ofTragopogon porrifolius L. Compt. Rend. Acad. Bulgar. Sci. 26: 957–960.Google Scholar
  4. Feinbrun-Dothan, N. 1978.Tragopogon.In: Flora Palaestina 3: 421–423. Israel Acad. Sci. and Human. Jerusalem.Google Scholar
  5. Matthews, V. A. 1975.Tragopogon. Pages 657–668.In: Flora of Turkey and the East Aegean Islands. Univ. of Edinburgh Press, Edinburgh Scotland.Google Scholar
  6. Ownbey, M. 1950. Natural hybridization and amphiploidy in the genusTragopogon. Amer. J. Bot. 37: 487–499.CrossRefGoogle Scholar
  7. — & G. B. McCollum. 1953. Cytoplasmic inheritance and reciprocal amphiploidy inTragopogon. Amer. J. Bot. 40: 788–796.CrossRefGoogle Scholar
  8. ——. 1954. The chromosomes ofTragopogon. Rhodora 56: 7–21.Google Scholar
  9. Rechinger, K. H. 1977.Tragopogon. Pages 85–120, Tabs. 52–81. Fl. Iran. no. 122. Akademische Druck- u. Verlagsanstalt Graz, Austria.Google Scholar
  10. Richardson, J. F. 1976.Tragopogon. Pages 322–325.In: Flora Europaea. Cambridge Univ. Press, Cambridge, England.Google Scholar
  11. Stebbins, G. L., Jr. 1953. A new classification of the tribe Cichorieae, family Compositae. Madroño 12: 65–81.Google Scholar
  12. Tomb, A. S., K. L. Chambers, D. W. Kyhos, A. M. Powell & P. H. Raven. 1978. Chromosome numbers in the Compositae. XIV. Lactuceae. Amer. J. Bot. 65: 717–722.CrossRefGoogle Scholar
  13. Wilson, F. D. 1982. A cytological basis for the separation ofGeropogon fromTragopogon (Compositae, Lactuceae). Brittonia 34: 290–293.CrossRefGoogle Scholar
  14. Winge, O. 1938. Inheritance of species characters inTragopogon. A cytogenetic investigation. Compt. Rend. Lab. Carlsberg, Ser. Physiol. 22: 155–195. Plates I & II.Google Scholar

Copyright information

© the New York Botanical Garden 1983

Authors and Affiliations

  • F. Douglas Wilson
    • 1
  1. 1.USDA-ARS and Arizona Agr. Exp. Stn.Phoenix

Personalised recommendations