Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Genetic Diversity and Environmental Associations of Wild Barley, Hordeum spontaneum, in Israel

Eviatar Nevo, Daniel Zohary, A. H. D. Brown and Michael Haber
Evolution
Vol. 33, No. 3 (Sep., 1979), pp. 815-833
DOI: 10.2307/2407648
Stable URL: http://www.jstor.org/stable/2407648
Page Count: 19
  • Read Online (Free)
  • Download ($4.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Genetic Diversity and Environmental Associations of Wild Barley, Hordeum spontaneum, in Israel
Preview not available

Abstract

Genetic structure of populations of the wild progenitor of barley was studied by electrophoretically discernible allozymic variation in proteins encoded by 28 gene loci in 1,179 individuals representing 28 populations of wild barley, Hordeum spontaneum, in Israel; for comparison the same test was conducted on 100 random seeds of Composite Cross XXI (generation 17) of cultivated barley, Hordeum vulgare. Likewise, four spikelet traits were measured in 26 of the aforementioned populations of wild barley. The results indicate that: (a) Hordeum spontaneum in Israel is extremely rich genetically but because of predominant self-pollination the variation is carried primarily by different homozygotes in the population; (b) genetic differentiation of populations includes clinal, regional and local patterns, sometimes displaying sharp geographic differentiation over short distances; (c) the patterns of genetic and spikelet variation in the wild gene pool are significantly correlated with the environment and are predictable ecologically, chiefly by combinations of temperature and humidity variables but also by soil types and vegetation; (d) natural populations are on average more variable than the tested Composite Cross generation; (e) distinct geographic variation is shown also by all four morphological traits examined (statistically significant amount of variation is present between localities within regions and between regions); and (f) allozymic variation is largely not correlated with spikelet variation. The spatial patterns and environmental correlates and predictors of genetic variation of H. spontaneum in Israel indicate that genetic variation in wild barley populations is not only common but also at least partly adaptive. Therefore a much fuller exploitation of these genetic resources by breeding is warranted.

Page Thumbnails

  • Thumbnail: Page 
815
    815
  • Thumbnail: Page 
816
    816
  • Thumbnail: Page 
817
    817
  • Thumbnail: Page 
818
    818
  • Thumbnail: Page 
819
    819
  • Thumbnail: Page 
820
    820
  • Thumbnail: Page 
821
    821
  • Thumbnail: Page 
822
    822
  • Thumbnail: Page 
823
    823
  • Thumbnail: Page 
824
    824
  • Thumbnail: Page 
825
    825
  • Thumbnail: Page 
826
    826
  • Thumbnail: Page 
827
    827
  • Thumbnail: Page 
828
    828
  • Thumbnail: Page 
829
    829
  • Thumbnail: Page 
830
    830
  • Thumbnail: Page 
831
    831
  • Thumbnail: Page 
832
    832
  • Thumbnail: Page 
833
    833