Climatic effects on microsatellite diversity in wild emmer wheat (Triticum dicoccoides) at the Yehudiyya microsite, Israel

Y. C. Li, M. S. Röder, T. Fahima, V. M. Kirzhner, A. Beiles, A. B. Korol, E. Nevo

Research output: Contribution to journalArticlepeer-review

Abstract

Microsatellite (SSR) diversity at 28 loci comprising seven types of tandem dinucleotide repeated motifs was analyzed in 105 individual plants of wild emmer wheat, Triticum dicoccoides, from a microsite in Yehudiyya, northeast of the Sea of Galilee, Israel. The study area was less than 1000 m2 and involved 12 paired plots distributed in a mosaic pattern. Each experiment involved very close (a few meters apart), but sharply divergent, microclimatic niches in the open park forest of Tabor oak: (1) sun, between trees, and (2) shade, under tree canopy. Significant microclimatic divergence characterized many loci displaying asymmetric and non-random distribution of repeat numbers. Niche-specific and niche-unique alleles and linkage disequilibria were found in the two sub-populations. Microsatellite diversity at both single- and two-locus levels is affected by microclimatic environment. The evidence reflects effects of ecological stresses and natural selection on SSR diversity, resulting presumably in adaptive structures.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalHeredity
Volume89
Issue number2
DOIs
StatePublished - 2002

Bibliographical note

Funding Information:
This work was supported by grants from the German-Israeli Cooperation Project (DIP project No. DIP-B 4.3) funded by the BMBF and supported by BMBF’s International Bureau at the DLR, THE ISRAEL SCIENCE FOUNDATION (No. 9030/96 and 9048/99), the Israeli Discount Bank Chair of Evolutionary Biology and the Ancell-Teicher Research Foundation for Genetics and Molecular Evolution. The authors wish to thank Dr V Korzun, Ms K Wendehake and Mrs T Krugman for their excellent help, and the Graduate School, University of Haifa for support to this study.

Keywords

  • Microclimatic selection
  • Microsatellite variation
  • Triticum dicoccoides
  • Wild emmer wheat

ASJC Scopus subject areas

  • Genetics(clinical)
  • Genetics

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