Abstract
If intraspecific variation to rising atmospheric CO 2 exists in soybean [ Glycine max (L.) Merr.], such variation could be used to select for optimal, high‐yielding cultivars. To quantify the range and determine the basis for variation in seed‐yield with increasing CO 2 , eight ancestral and one modern soybean cultivar differing in determinacy, maturity group, and morphology were grown to reproductive maturity at two CO 2 partial pressures, 40 Pa (ambient) and 71 Pa (elevated). Experiments were replicated three times in temperature controlled glasshouses during 1998 and 1999. Although all cultivars showed a significant increase in seed yield with elevated CO 2 ,(∼40%) Mandarin, an ancestral indeterminate cultivar, showed a greater relative response of seed yield to increased CO 2 than did all other cultivars (∼80%). The observed variation in seed yield response to CO 2 was not correlated with any vegetative parameter. At maturity, significant correlations in the relative response of seed yield to CO 2 were observed for both pod weight per plant and seed weight from branches. The later observation suggests that the sensitivity of seed yield response to CO 2 was associated with plasticity in the ability to form new seed in axillary branches in a high CO 2 environment. Genotypic differences in the seed yield response among existing ancestral soybeans suggests that sufficient germplasm is available for breeders to begin selecting lines which maximize soybean yield in response to increasing atmospheric CO 2
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Claims 7
Claim · model-written summary
All soybean cultivars significantly increased seed yield under elevated carbon dioxide by about 40%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all cultivars showed a significant increase in seed yield with elevated CO 2 ,(∼40%)”
t0“Soybean”
Claim · model-written summary
Mandarin increased seed yield about 80%, more than other cultivars.
- Taxon
- Soybean
Glycine maxt0 - Material
- Mandarine0
- Treatment
- increased CO 2e0
- Outcome
- relative response of seed yielde0
- Direction
- greatere0
- Value
- ∼80%e0
- Comparator
- all other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mandarin, an ancestral indeterminate cultivar, showed a greater relative response of seed yield to increased CO 2 than did all other cultivars (∼80%)”
t0“Soybean”
Claim · model-written summary
Seed yield response variation was not correlated with vegetative parameters.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- variation in seed yield response to CO 2e0
- Comparator
- vegetative parametere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The observed variation in seed yield response to CO 2 was not correlated with any vegetative parameter”
t0“Soybean”
Claim · model-written summary
Relative seed yield response to carbon dioxide correlated significantly with pod weight per plant.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- relative response of seed yield to CO 2e0
- Comparator
- pod weight per plante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant correlations in the relative response of seed yield to CO 2 were observed for both pod weight per plant and seed weight from branches”
t0“Soybean”
Claim · model-written summary
Relative seed yield response to carbon dioxide correlated significantly with seed weight from branches.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- relative response of seed yield to CO 2e0
- Comparator
- seed weight from branchese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant correlations in the relative response of seed yield to CO 2 were observed for both pod weight per plant and seed weight from branches”
t0“Soybean”
Claim · model-written summary
The authors suggested that seed yield sensitivity to carbon dioxide was associated with axillary branch seed formation plasticity.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- axillary branchese0
- Outcome
- sensitivity of seed yield response to CO 2e0
- Qualifier
- plasticity in the ability to form new seede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the sensitivity of seed yield response to CO 2 was associated with plasticity in the ability to form new seed in axillary branches in a high CO 2 environment”
t0“Soybean”
Claim · model-written summary
The authors suggested ancestral soybean germplasm could be selected to maximize yield under rising carbon dioxide.
- Taxon
- soybeanGlycine maxe0
- Outcome
- selecting lines which maximize soybean yielde0
- Qualifier
- in response to increasing atmospheric CO 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sufficient germplasm is available for breeders to begin selecting lines which maximize soybean yield in response to increasing atmospheric CO 2”
The same questions in other papers
co2 · yield · Glycine max (soybean)Positive and negative results
85 papers in the same direction as this paper · 10 in the opposite direction
- no effect
- negative
- no effect
92 papers more in this group
See all 96 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.