Result description
There is an increasing understanding of stress response and disease resistance pathways in model plants and how these pathways intersect and interact. These earlier studies suggest that the ClimBar study may uncover a parallel set of loci in barley, helping to provide breeding leads for resilience. In this study, two sources of plant material have been phenotyped for adaptation and resilience to two different abiotic stresses. In the first set of experiments, land races of barley (Hordeum vulgare) lines from Italy have been phenotyped for adaptation and resilience to water deprivation. The phenotypic physiological profile is based on a set of whole-plant parameters. In the second set of experiments, wild barley (H. vulgare sps. spontaneum) lines collected across Israel (The Barley1K collection; Hubner et al. 2009) were phenotyped in the Phytotron and in a Fytoscope and phenotyped for growth and circadian clock behaviour under optimal and high temperature.
This experiment therefore started as a screening procedure and found a spectrum of responses within the wild barley. It exposed a strong correlation between clock plasticity and growth stability under high temperature and prompt the generation of the first DH population within the H. vulgare spontaneum. Dissecting this relationship and identifying causal variation will be of great interest for understanding mechanism of canalization against changing temperature environments and as a source for novel alleles to increase robustness of modern varieties.
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Result submitted to Horizon Results Platform by MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT