Journal article
Significant decrease in yield under future climate conditions: Stability and production of 138 spring barley accessions
Department of Chemical and Biochemical Engineering, Technical University of Denmark1
University of Kassel2
University of Copenhagen3
MTT Agrifood Research4
Nordic Seed A/S5
Nordic Genetic Resource Center6
Ecosystems Programme, Department of Chemical and Biochemical Engineering, Technical University of Denmark7
Department of Applied Mathematics and Computer Science, Technical University of Denmark8
Statistics and Data Analysis, Department of Applied Mathematics and Computer Science, Technical University of Denmark9
The 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.
Language: | English |
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Publisher: | Elsevier BV |
Year: | 2015 |
Pages: | 105-113 |
ISSN: | 11610301 and 18737331 |
Types: | Journal article |
DOI: | 10.1016/j.eja.2014.12.003 |
ORCIDs: | Mikkelsen, Teis Nørgaard , Stockmarr, Anders , Bagger Jørgensen, Rikke and 0000-0003-2179-7090 |