Advertisement

Biodiversity & Conservation

, Volume 7, Issue 6, pp 799–813 | Cite as

Phenotypic variation and stress resistance in core and peripheral populations of Hordeum spontaneum

  • Sergei Volis
  • Samuel Mendlinger
  • Linda Olsvig-Whittaker
  • Uriel N. Safriel
  • Nikolay Orlovsky
Article

Abstract

The phenotypic variation and response of plants to water stress were studied in a field trial in populations of wild barley, Hordeum spontaneum Koch. from Israel and Turkmenistan. Populations from the species distributional core and periphery were compared and contrasted for phenotypic variation in 16 phenological and morphological traits. The peripheral populations (six) were found to be phenotypically more variable and more resistant to water stress than core populations (12). The association of water-stress resistance with high phenotypic variability gives support to the hypothesis that populations that are genetically more variable are better adapted or pre-adapted to environmental changes and are thus valuable for conservation.

phenotypic variation core and peripheral populations wild barley 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Antonovics, J. (1994) Ecological genetics of metapopulations: the Silene-Ustilago Plant-Pathogen System. In Ecological Genetics (L. A. Real, ed.), pp. 146–70. New Jersey: Princeton University Press.Google Scholar
  2. Bradshaw, A.D. (1965) Evolutionary significance of phenotypic plasticity in plants. Adv. Genetics 13, 115–55.Google Scholar
  3. Brown, A.H.D., Nevo, E., Zohary, D. and Dagan, O. (1978) Genetic variation in natural populations of wild barley (Hordeum spontaneum). Genetica 49, 97–108.Google Scholar
  4. Brussard, P. (1984) Geographic patterns and environmental gradients: the central-marginal model in Drosophila revisited. Annu. Rev. Ecol. Syst. 15, 25–64.Google Scholar
  5. Carson, H.L. (1959) Genetic conditions that promote or retard the formation of species. Cold Spring Harbor Symp. Quant. Biol. 24, 87–103.Google Scholar
  6. Chalmers, K.J., Waugh, R., Watters, J., Foster, B.P., Nevo, E., Abbott, R.J. and Powell, W. (1992) Grain isozyme and ribosomal DNA variability in Hordeum spontaneum populations from Israel. Theoret. App. Genetics 84, 313–22.Google Scholar
  7. da Cunha, A.B. and Dobzhansky, T. (1954) A further study of chromosomal polymorphism in Drosophila willistoni in relation to environment. Evolution 8, 119–34.Google Scholar
  8. Fisher, R.A. (1930) The General Theory of Natural Selection. Oxford: Clarendon Press.Google Scholar
  9. Grime, J.P., Crick, J.C. and Rincon, E. (1986) The ecological significance of plasticity. In Plasticity in Plants (D.H. Jennings and A.J. Trewavas, eds), pp. 5–29. Cambridge: Company of Biologists.Google Scholar
  10. Harlan, R.J. and Zohary, D. (1966) Distribution of wild wheats and barley. Science 153, 1074–80.Google Scholar
  11. Jana, S. and Pietrzak, L.N. (1988) Comparative assessment of genetic diversity in wild and primitive cultivated barley in a center of diversity. Genetics 119, 981–90.Google Scholar
  12. Lewontin, R.C. (1957) The adaptations of populations to varying environments. Cold Spring Harbor Symp. Quant. Biol. 22, 395–408.Google Scholar
  13. Marshall, D.R. and Brown, A.H.D. (1975) Optimum sampling strategies in genetic conservation. In Crop Genetic Resources for Today and Tomorrow (O.H. Frankel and J.G. Hawks, eds), pp. 53–80. Cambridge: Cambridge University Press.Google Scholar
  14. Marshall, D.M. and Jain, S.K. (1968) Phenotypic plasticity of Avena fatua and A. barbata. Am. Nat. 102, 457–67.Google Scholar
  15. Mayr, E. (1965) Animal Species and Evolution. Cambridge, MA: Belkhap Press.Google Scholar
  16. Mayr, E. (1970) Populations, Species, and Evolution. Cambridge, MA: Belkhap Press.Google Scholar
  17. Mendlinger, S. and Zohary, D. (1995) The extent and structure of genetic variation in species of the Sitopsis group of Aegilops. Heredity 74, 616–27.Google Scholar
  18. Nevo, E., Beiles, A., Gutterman, Y., Storch, N. and Kaplan, D. (1984) Genetic resources of wild cereals in Israel and vicinity. II. Phenotypic variation within and between populations of wild barley, Hordeum spontaneum. Euphytica 33, 737–56.Google Scholar
  19. Nevo, E., Beiles, A. and Zohary, D. (1986) Genetic resources of wild barley in the Near East: structure, evolution and application in breeding. Biol. J. Linnean Soc. 27, 355–80.Google Scholar
  20. Parsons, P.A. (1980) Adaptive strategies in natural populations of Drosophila: ethanol tolerance, dessication resistance, and development times in climatically optimal and extreme environments. Theoret. Appl. Genetics 57, 257–66.Google Scholar
  21. Parsons, P.A. (1991) Evolutionary rates: stress and species boundaries. Annu. Rev. Ecol. Syst. 22, 1–18.Google Scholar
  22. Pease, C.M., Lande, R. and Bull, J.J. (1989) A model of population growth, dispersal and evolution in a changing environment. Ecology 70, 1657–64.Google Scholar
  23. Safriel, U.N., Volis, S. and Kark, S. (1994) Core and peripheral populations and global climate change. Israeli J. Plant Sci. 42, 331–45.Google Scholar
  24. Saghai Maroof, M.A. and Allard, R.W. (1990) Genetic diversity and ecogeographical differentiation among ribosomal DNA alleles in wild and cultivated barley. Proc. Natl. Acad. Sci. USA 87, 8486–90.Google Scholar
  25. Snow, L. and Brody, T. (1984) Genetic variation of Hordeum spontaneum in Israel: eco-geographical races, detected by trait measurements. Plant Syst. Evol. 145, 15–28.Google Scholar
  26. Soule, M. (1973) The epistasis cycle: a theory of marginal populations. Annu. Rev. Ecol. Syst. 4, 165–87.Google Scholar
  27. Ter Braak, C.J.F. (1987) Canoco-a Fortran Program for Canonical Community Ordination by (Partial) (Detrended) (Canonical) Correspondence Analysis, Principal Component Analysis and Redundancy Analysis. TNO Institute of Applied Computer Science, Wageningen.Google Scholar
  28. Trevis, J. (1994) Ecological genetics of life-history traits: variation and its evolutionary significance. In Ecological Genetics (L.A. Real, ed.) pp. 171–204. New Jersey: Princeton University Press.Google Scholar
  29. Zohary, D. (1973) Geobotanical Foundations to the Middle East, vols 1 and 2. Stuttgart: G. Fisher, and Amsterdam: Swets and Zeitlinger.Google Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Sergei Volis
    • 1
  • Samuel Mendlinger
    • 1
  • Linda Olsvig-Whittaker
    • 2
  • Uriel N. Safriel
    • 3
    • 4
  • Nikolay Orlovsky
    • 5
  1. 1.The Institutes for Applied ResearchBen-Gurion University of the NegevBeer ShevaIsrael
  2. 2.JerusalemIsrael
  3. 3.The Mitrani Center for Desert EcologyBen-Gurion University of the NegevSede BoqerIsrael
  4. 4.Department of Evolution, Systematics and Ecology, Alexander Silberman Institute of Life SciencesThe Hebrew University of JerusalemJerusalemIsrael
  5. 5.The Institute for Desert ResearchAshgabatTurkmenistan

Personalised recommendations