Genetic Diversity and Potential High Temperature Tolerance in Barley (Hordeum vulgare)

Salah Fatouh Abou-Elwafa^1, and Karam A. Amein²

¹Agronomy Department, College of Agriculture, Assiut University, 71526 Assiut, Egypt

²Genetics Department, College of Agriculture, Assiut University, 71526 Assiut, Egypt

Cite this paper

Salah Fatouh Abou-Elwafa and Karam A. Amein. Genetic Diversity and Potential High Temperature Tolerance in Barley (Hordeum vulgare). World Journal of Agricultural Research. 2016; 4(1):1-8. doi: 10.12691/WJAR-4-1-1

Abstract

Heat stress is an important abiotic stress causing the major threat to the growth and development of most crop plants. A panel of 326 barley genotypes comprises of 320 wild barley accessions and six local cultivars were evaluated for days to heading (DTH), days to flowering (DTF), number of tillers per plant (NoT), plant height (PH), Chlorophyll content (CC), spike length (SL), thousand kernel weight (TKW) and single plant yield (SPY) under optimum sowing and heat-stressed conditions. All measured traits exhibited highly significant differences both among evaluated genotypes and between the optimum sowing and the heat-stressed conditions. Plants exposed to high temperatures flowered earlier. A drastic reduction in morphological and yield contributing traits, i.e., PH, NoT, SL, TKW, SPY and CC under heat stress conditions was observed. Cluster analysis revealed two distinct groups based on heat stress tolerance with substantial diversity among the heat tolerant genotypes.

Keywords

barley, Hordeum, heat-stress, temperature stress, cluster analysis

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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