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Diversity of germination and seedling traits in a spring barley (Hordeum vulgare L.) collection under drought simulated conditions

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Abstract

This research evaluated the genotypic variation in a diverse set of 233 barley genotypes including 57 landraces in the context of early drought tolerance using polyethylene glycol-(PEG) induced osmotic stress on germinating seeds. The effect of PEG treatment ranged from accelerating to delaying the germination rate. PEG showed inhibitory effects on all seedling traits. Expressions of root and shoot traits recorded under optimum and under PEG-induced drought stress were positively and significantly correlated. Combined analysis of variance over experiments and treatments showed intermediate to high broad sense heritability values ranging from 0.42 to 0.76 for germination rate and seedling traits. Higher heritability values were obtained under optimum conditions as compared to PEG-induced drought stress conditions, indicating that the selection for genotypes with a more vigorous root system would be more efficient under optimum conditions. The extensive genetic variation for root morphology-related traits found in this diverse collection opens the opportunity to further investigate the analyzed root traits as selection criteria to improve barley performance under drought stress and to reveal the genetic basis for the observed stress tolerance by a genome-wide association study.

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Acknowledgments

The authors are very thankful to Maximilian Rembe, Axel Aßfalg, Christiane Kehler, Ute Krajewski, Heike Harms, Birgit Dubsky, Marita Nix, Kerstin Wolf, Fatemeh Nasernakai and Enk Geyer and for their technical assistance.We thank Manuela Nagel, Ben Gruber, Nicolaus von Wirén, Helmy Youssef and Ahmad Alqudah for discussions and support. We thank the GABI-GENOBAR and the CROP.SENSe.net consortium, for collaboration. Adel Abdel-Ghani was a visiting scientist at Leibniz Institute of Plant Genetics and Crop Plant, Research (IPK) in 2012—based on the scientific agreement cooperation between the Deutsche Forschungsgemeinschaft (DFG) and the Higher Council for Science and Technology (HCST) of Jordan. The authors wish to thank the Deutsche Forschungsgemeinschaft for financial support (KI 1465/8-1).

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Authors and Affiliations

  1. Department of Plant Production, Faculty of Agriculture, Mu’tah University, Mu’tah, Karak, 61710, Jordan

    Adel H. Abdel-Ghani & Saed J. Owais

  2. Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Diversity, Corrensstrasse 3, 06466, Gatersleben, Germany

    Kerstin Neumann, Celestine Wabila, Rajiv Sharma, Sidram Dhanagond, Andreas Börner, Andreas Graner & Benjamin Kilian

  3. Innovation Center, BCS R&D - Trait Research - Physiology, Bayer CropScience NV, Technologiepark 38, 9052, Zwijnaarde (Gent), Belgium

    Benjamin Kilian

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  1. Adel H. Abdel-Ghani
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Correspondence to Adel H. Abdel-Ghani.

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Adel H. Abdel-Ghani and Kerstin Neumann have contributed equally to this work.

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Abdel-Ghani, A.H., Neumann, K., Wabila, C. et al. Diversity of germination and seedling traits in a spring barley (Hordeum vulgare L.) collection under drought simulated conditions. Genet Resour Crop Evol 62, 275–292 (2015). https://doi.org/10.1007/s10722-014-0152-z

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