TY - JOUR
T1 - Significant decrease in yield under future climate conditions
T2 - stability and production of 138 spring barley accessions
AU - Ingvordsen, Cathrine Heinz
AU - Backes, Gunter
AU - Lyngkjær, Michael Foged
AU - Peltonen-Sainio, Pirjo
AU - Jensen, Jens Due
AU - Jalli, Marja
AU - Jahoor, Ahmed
AU - Rasmussen, Morten
AU - Mikkelsen, Teis Nørgaard
AU - Stockmarr, Anders
AU - Bagger Jørgensen, Rikke
PY - 2015/2/1
Y1 - 2015/2/1
N2 - The response in production parameters to projected future levels of temperature, atmospheric carbon dioxide ([CO2]), and ozone ([O3]) was investigated in 138 spring barley accessions. The comprehensive set of landraces, cultivars, and breeder-lines, were during their entire life cycle exposed to a two-factor treatment of combined elevated temperature (+5°C day/night) and [CO2] (700ppm), as well as single-factor treatments of elevated temperature (+5°C day/night), [CO2] (700ppm), and [O3] (100-150ppb). The control treatment was equivalent to present average South Scandinavian climate (temperature: 19/12°C (day/night), [CO2]: 385ppm). Overall grain yield was found to decrease 29% in the two-factor treatment with concurrent elevation of [CO2] and temperature, and this response could not be predicted from the results of treatments with elevated [CO2] and temperature as single factors, where grain yield increased 16% and decreased 56%, respectively. Elevated [O3] was found to decrease grain yield by 15%. Substantial variation in response to the applied climate treatments was found between the accessions. The results revealed landraces, cultivars, and breeder-lines with phenotypes applicable for breeding towards stable and high yield under future climate conditions. Further, we suggest identifying resources for breeding under multifactor climate conditions, as single-factor treatments did not accurately forecast the response, when factors were combined.
AB - The response in production parameters to projected future levels of temperature, atmospheric carbon dioxide ([CO2]), and ozone ([O3]) was investigated in 138 spring barley accessions. The comprehensive set of landraces, cultivars, and breeder-lines, were during their entire life cycle exposed to a two-factor treatment of combined elevated temperature (+5°C day/night) and [CO2] (700ppm), as well as single-factor treatments of elevated temperature (+5°C day/night), [CO2] (700ppm), and [O3] (100-150ppb). The control treatment was equivalent to present average South Scandinavian climate (temperature: 19/12°C (day/night), [CO2]: 385ppm). Overall grain yield was found to decrease 29% in the two-factor treatment with concurrent elevation of [CO2] and temperature, and this response could not be predicted from the results of treatments with elevated [CO2] and temperature as single factors, where grain yield increased 16% and decreased 56%, respectively. Elevated [O3] was found to decrease grain yield by 15%. Substantial variation in response to the applied climate treatments was found between the accessions. The results revealed landraces, cultivars, and breeder-lines with phenotypes applicable for breeding towards stable and high yield under future climate conditions. Further, we suggest identifying resources for breeding under multifactor climate conditions, as single-factor treatments did not accurately forecast the response, when factors were combined.
U2 - 10.1016/j.eja.2014.12.003
DO - 10.1016/j.eja.2014.12.003
M3 - Journal article
SN - 1161-0301
VL - 63
SP - 105
EP - 113
JO - European Journal of Agronomy
JF - European Journal of Agronomy
ER -
