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 language | English |
|---|---|
| Pages (from-to) | 127-132 |
| Number of pages | 6 |
| Journal | Heredity |
| Volume | 89 |
| Issue number | 2 |
| DOIs | |
| State | Published - 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
- Genetics(clinical)