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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Is there potential to adapt soybean (Glycine maxMerr.) to future [CO2]?
T2 - an analysis of the yield response of 18 genotypes in free-air CO2 enrichment
AU - Bishop, Kristen A.
AU - Betzelberger, Amy M.
AU - Long, Stephen P.
AU - Ainsworth, Elizabeth A.
PY - 2015/9
Y1 - 2015/9
N2 - Rising atmospheric [CO2] is a uniform, global change that increases C-3 photosynthesis and could offset some of the negative effects of global climate change on crop yields. Genetic variation in yield responsiveness to rising [CO2] would provide an opportunity to breed more responsive crop genotypes. A multi-year study of 18 soybean (Glycine maxMerr.) genotypes was carried out to identify variation in responsiveness to season-long elevated [CO2] (550ppm) under fully open-air replicated field conditions. On average across 18 genotypes, elevated [CO2] stimulated total above-ground biomass by 22%, but seed yield by only 9%, in part because most genotypes showed a reduction in partitioning of energy to seeds. Over four years of study, there was consistency from year to year in the genotypes that were most and least responsive to elevated [CO2], suggesting heritability of CO2 response. Further analysis of six genotypes did not reveal a photosynthetic basis for the variation in yield response. Although partitioning to seed was decreased, cultivars with the highest partitioning coefficient in current [CO2] also had the highest partitioning coefficient in elevated [CO2]. The results show the existence of genetic variation in soybean response to elevated [CO2], which is needed to breed soybean to the future atmospheric environment.This study investigated the response of 18 soybean varieties to elevated carbon dioxide concentrations ([CO2]) in the field. There was variation in the response of seed yield in the genotypes, ranging from no stimulation to a 22% increase in yield, and consistency from year to year in the varieties that were the most and least responsive to elevated [CO2]. Results support the potential to breed crops for enhanced CO2 response.
AB - Rising atmospheric [CO2] is a uniform, global change that increases C-3 photosynthesis and could offset some of the negative effects of global climate change on crop yields. Genetic variation in yield responsiveness to rising [CO2] would provide an opportunity to breed more responsive crop genotypes. A multi-year study of 18 soybean (Glycine maxMerr.) genotypes was carried out to identify variation in responsiveness to season-long elevated [CO2] (550ppm) under fully open-air replicated field conditions. On average across 18 genotypes, elevated [CO2] stimulated total above-ground biomass by 22%, but seed yield by only 9%, in part because most genotypes showed a reduction in partitioning of energy to seeds. Over four years of study, there was consistency from year to year in the genotypes that were most and least responsive to elevated [CO2], suggesting heritability of CO2 response. Further analysis of six genotypes did not reveal a photosynthetic basis for the variation in yield response. Although partitioning to seed was decreased, cultivars with the highest partitioning coefficient in current [CO2] also had the highest partitioning coefficient in elevated [CO2]. The results show the existence of genetic variation in soybean response to elevated [CO2], which is needed to breed soybean to the future atmospheric environment.This study investigated the response of 18 soybean varieties to elevated carbon dioxide concentrations ([CO2]) in the field. There was variation in the response of seed yield in the genotypes, ranging from no stimulation to a 22% increase in yield, and consistency from year to year in the varieties that were the most and least responsive to elevated [CO2]. Results support the potential to breed crops for enhanced CO2 response.
KW - atmospheric change
KW - biomass partitioning
KW - climate change
KW - crop development
KW - crop yield
KW - food security
KW - global change
KW - harvest index
KW - ATMOSPHERIC CARBON-DIOXIDE
KW - ELEVATED CO2
KW - SEED YIELD
KW - CLIMATE-CHANGE
KW - FIELD
KW - FACE
KW - PHOTOSYNTHESIS
KW - MAX
KW - PLANTS
KW - PRODUCTIVITY
U2 - 10.1111/pce.12443
DO - 10.1111/pce.12443
M3 - Journal article
VL - 38
SP - 1765
EP - 1774
JO - Plant, Cell and Environment
JF - Plant, Cell and Environment
SN - 0140-7791
IS - 9
ER -