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Significant decrease in yield under future climate conditions: Stabilityand production of 138 spring barley accessions

Ingvordsen, Cathrine Heinz ; Backes, Gunter; Lyngkjær, M.; Peltonen-Sainio, Pirjo; Jensen, Jens D.; Jalli, Marja; Jahoor, Ahmed; Rasmussen, Morten; Mikkelsen, Tesi N.; Stockmarr, A. and Jørgensen, Rikke Bagger (2015) Significant decrease in yield under future climate conditions: Stabilityand production of 138 spring barley accessions. European Journal of Agronomy, 63, pp. 105-113.

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Online at: http://www.sciencedirect.com/science/article/pii/S1161030114001440

Summary

tThe response in production parameters to projected future levels of temperature, atmospheric carbondioxide ([CO2]), and ozone ([O3]) was investigated in 138 spring barley accessions. The comprehensive setof landraces, cultivars, and breeder-lines, were during their entire life cycle exposed to a two-factor treat-ment of combined elevated temperature (+5°C day/night) and [CO2] (700 ppm), as well as single-factortreatments of elevated temperature (+5°C day/night), [CO2] (700 ppm), and [O3] (100–150 ppb). Thecontrol treatment was equivalent to present average South Scandinavian climate (temperature: 19/12◦C(day/night), [CO2]: 385 ppm). Overall grain yield was found to decrease 29% in the two-factor treatmentwith concurrent elevation of [CO2] and temperature, and this response could not be predicted from theresults of treatments with elevated [CO2] and temperature as single factors, where grain yield increased16% and decreased 56%, respectively. Elevated [O3] was found to decrease grain yield by 15%. Substantialvariation in response to the applied climate treatments was found between the accessions. The resultsrevealed landraces, cultivars, and breeder-lines with phenotypes applicable for breeding towards stableand high yield under future climate conditions. Further, we suggest identifying resources for breedingunder multifactor climate conditions, as single-factor treatments did not accurately forecast the response,when factors were combined.


EPrint Type:Journal paper
Subjects: Crop husbandry > Production systems
Food systems > Food security, food quality and human health
Environmental aspects > Air and water emissions
Crop husbandry > Breeding, genetics and propagation
Research affiliation: European Union > CORE Organic II > COBRA
Denmark > DTU - Technical University of Denmark > DTU, RISØ - Risø National Laboratory
Deposited By: Jørgensen, Dr. Rikke Bagger
ID Code:28030
Deposited On:09 Jan 2015 16:06
Last Modified:09 Jan 2015 16:06
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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