caa a22 4500 475794761 CHVBK 20180406123720.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1007/s001220051484 doi (NATIONALLICENCE)springer-10.1007/s001220051484 Genetic diversity in wild wheats and goat grass [Elektronische Daten] [S. G. Hegde, J. Valkoun, J. G. Waines] Abstract : The genetic structure of 35 populations of wild relatives of cultivated wheats, all collected in Syria and Lebanon, was assessed using ten isozymes. The populations consisted of diploid goat grass, Aegilops speltoides, diploid wild wheats, Triticum monococcum spp. aegilopoides and T. urartu, and tetraploid wild wheat, T. turgidum ssp. dicoccoides. The majority of the populations were polymorphic (P=0-70%) having low within-population mean genetic diversity (Hep=0.05-0.10) and relatively high within-species genetic diversity (Hes=0.14-0.31). The linkage between loci did not seem to be one of the causes for the observed polymorphism. All four species showed significant inbreeding at both the population (0.31-0.64) and species (0.77-0.96) levels, and the extent of inbreeding did not correlate with mating systems. Despite their apparent common ecological and evolutionary history, between-population or between-species level genetic identity was low (I=0.43-0.86). Among the diploid species, populations of Ae. speltoides clustered distinctly from those overlapping clusters of T. monococcum ssp. aegilopoides and T. urartu. The tetraploid species T. turgidum ssp. dicoccoides had relatively less genetic diversity (Hes=0.14) and was highly homozygous (F=0.96). The results suggest that these wild progenitors of cultivated wheats have undergone extensive local differentiation and inbreeding. We discuss the implications of our results on the management of wild wheat and goat grass populations. Springer-Verlag Berlin Heidelberg, 2000 Keywords Genetic diversity nationallicence Wild wheat nationallicence Goat grass nationallicence Isozyme nationallicence Conservation nationallicence Hegde S. G. Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA e-mail: waines@ucracl.ucr.edu, US aut Valkoun J. Genetic Resources Unit, International Center for Agricultural Research in the Dry Areas, P.O. Box 5466, Aleppo, Syria, XX aut Waines J. G. Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA e-mail: waines@ucracl.ucr.edu, US aut https://doi.org/10.1007/s001220051484 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051484 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hegde S. G. Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA e-mail: waines@ucracl.ucr.edu, US aut NATIONALLICENCE 700 1- Valkoun J. Genetic Resources Unit, International Center for Agricultural Research in the Dry Areas, P.O. Box 5466, Aleppo, Syria, XX aut NATIONALLICENCE 700 1- Waines J. G. Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA e-mail: waines@ucracl.ucr.edu, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer