Abstract
Genetic variability within and between populations of the wild progenitor of barley was studied electrophoretically. Thirty enzyme loci were assayed in 437 individuals representing 11 populations ofH. spontaneum in Turkey. The results indicated that: (a)H. spontaneum in Turkey is genetically rich in allozyme variation, but because of predominant self-pollination the variation is maintained as 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) overall indices of allozymic diversity and some allele frequencies of wild barley are significantly correlated with the environment and are predictable ecologically, chiefly by combinations of temperature and humidity variables; (d) a high percentage of alleles (66%) occur in local areas or are distributed sporadically rather than widespread; (e) Wright Fixation index was very high, F=0.995; (f) genetic distance was high (D=0.11, ranging from 0.031 to 0.288) between populations, and (g) average relative genetic differentiation was high among populations (Gst=0.47, ranging from 0.02 to 0.66).
The spatial patterns and environmental correlates and predictors of genetic variation ofH. spontaneum in Turkey, indicated 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.
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References
Anonymous, 1983. SPSS-x, User's guide. New York, McGraw Hill Co.
Brown, A. H. D., 1978. Isozymes, plant population genetic structure and genetic conservation. Theor. appl. Genet. 52: 145–157.
Brown, A. H. D., Nevo, E. & Zohary, D., 1977. Associations of alleles at esterase loci in wild barley Hordeum spontaneum. Nature 268: 430–431.
Brown, A. H. D., Zohary, D. & Nevo, E., 1978a. Outcrossing rates and heterozygosity in natural populations of Hordeum spontaneum Koch in Israel. Heredity 41: 49–62.
Brown, A. H. D., Nevo, E., Zohary, D. & Dagan, O., 1978b. Genetic variation in natural populations of wild barley Hordeum spontaneum. Genetics 49: 97–108.
Brown, A. H. D., Feldman, M. W. & Nevo, E., 1980. Multilocus structure of natural populations of Hordeum spontaneum. Genetics 96: 523–536.
Harlan, J. R. & Zohary, D., 1966. Distribution of wild wheat and barley. Science 153: 1074–1080.
Marshall, D. K. & Brown, A. H. D., 1975. Optimum sampling strategies in genetic conservation. In: Crop genetic resources for today and tomorrow (eds O. H. Frankel, & J. G. Hawkes) pp. 53–70. Cambridge University Press. Cambridge.
Moseman, J. G., Nevo, E. & Zohary, D., 1983. Resistance of Hordeum spontaneum collected in Israel to infection with Erysiphe graminis hordei. Crop Science 23: 1115–1119.
Moseman, J. G., Nevo, E., El-Morshidy, M. A. & Zohary, D., 1985. Reactions of Hordeum spontaneum to infection with Israeli and United-States cultures of Puccinia hordei. Euphytica (in press).
Nei, M., 1972. Genetic distance between populations. Amer. Nat. 106: 283–292.
Nei, M., 1973. Analysis of gene deversity in subdivided populations. Proc. natn. Acad. Sci. USA. 70: 3321–3323.
Nevo, E., Brown, A. H. D. & Zohary, D., 1979a. Genetic diversity in the wild progenitor of barley in Israel. Experientia 35: 1027–1029.
Nevo, E., Zohary, D., Brown, A. H. D. & Haber, M., 1979b. Genetic diversity and environmental associations of wild barley, Hordeum spontaneum, in Israel. Evolution 33: 815–833.
Nevo, E., Brown, A. H. D., Zohary, D., Storch, N. & Beiles, A., 1981. Microgeographic edaphic differentiation of allozyme polymorphisms of wild barley. Pl. Syst. Evol. 138: 287–292.
Nevo, E., Beiles, A., Storch, N., Doll, H. & Anderson, B., 1983. Microgeographic edaphic differentiation in hordein polymorphisms of wild barley. Theor. appl Genet. 64: 123–132.
Nevo, E., Beiles, A. & Ben Shlomo, R., 1984a. The evolutionary significance of genetic diversity: Ecological, demographic and life history correlates. In: Evolutionary dynamics of genetic diversity, (ed. G. S. Mani). Lecture Notes Biomath. 53: 13–213.
Nevo, E., Moseman, J. G., Beiles, A. & Zohary, D., 1984b. Correlation of ecological factors and allozymic variations with resistance to Erysiphe graminis hordei in Hordeum spontaneum in Israel: patterns and application. Pl. Syst. Evol. 145: 79–96.
Nevo, E., Beiles, A., Gutterman, Y., Storch, N. & Kaplan, D., 1984c. Genetic resources of wild cereals in Israel: II. Phenotypic variation within and between populations of wild barley, Hordeum spontaneum. Euphytica 33: 737–756.
Nevo, E., Moseman, J. G., Beiles, A. & Zohary, D., 1985a. Patterns of resistance in wild wheat to pathogens in Israel: I. Predictive method by ecology and allozyme genotypes for powdery mildew and leaf rust. Genetica 67: 209–222.
Nevo, E., Zohary, D., Beiles, A., Kaplan, D. & Storch, N., 1985b. Genetic diversity and environmental associations of wild barley, Hordeum spontaneum, in Iran. Pl. Syst. Evol. (in press).
Wright, S., 1965. The interpretation of population structure by F-statistics with special regard to systems of mating. Evolution 19: 395–420.
Zohary, D., 1969. The progenitors of wheat and barley in relation to domestication and agricultural dispersal in the Old World, p. 47–66. In: The domestication and exploitation of plants and animals, (eds P. J. Ucko & G. W. Dimbleby). Duckworth, London.
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Nevo, E., Zohary, D., Beiles, A. et al. Genetic diversity and environmental associations of wild barley,Hordeum spontaneum, in Turkey. Genetica 68, 203–213 (1986). https://doi.org/10.1007/BF02424444
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DOI: https://doi.org/10.1007/BF02424444