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Phenotypic variation and stress resistance in core and peripheral populations of Hordeum spontaneum |
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| Authors: | Sergei Volis Samuel Mendlinger Linda Olsvig-Whittaker Uriel N Safriel Nikolay Orlovsky |
| Institution: | (1) The Institutes for Applied Research, Ben-Gurion University of the Negev, POB 653, Beer Sheva, 84105, Israel;(2) 78 Yirmiyahu St., Jerusalem, 94467, Israel;(3) The Mitrani Center for Desert Ecology, Ben-Gurion University of the Negev, Sede Boqer, 84993, Israel;(4) Department of Evolution, Systematics and Ecology, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel;(5) The Institute for Desert Research, Ashgabat, 744000, Turkmenistan |
| Abstract: | The phenotypic variation and response of plants to water stress were studied in a field trial in populations of wild barley, Hordeum spontaneum Koch. from Israel and Turkmenistan. Populations from the species distributional core and periphery were compared and contrasted for phenotypic variation in 16 phenological and morphological traits. The peripheral populations (six) were found to be phenotypically more variable and more resistant to water stress than core populations (12). The association of water-stress resistance with high phenotypic variability gives support to the hypothesis that populations that are genetically more variable are better adapted or pre-adapted to environmental changes and are thus valuable for conservation. |
| Keywords: | phenotypic variation core and peripheral populations wild barley |
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