Abstract
Drought during grain filling is a common challenge for sorghum production in north-eastern Australia, central-western India, and sub-Saharan Africa. We show that the stay-green drought adaptation trait enhances sorghum grain yield under post-anthesis drought in these three regions. A positive relationship between stay-green and yield was generally found in breeding trials in north-eastern Australia that sampled 1668 unique hybrid combinations and 23 environments. Physiological studies in Australia also found that introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent background reduced water demand before flowering and hence increased water supply during grain filling, resulting in higher grain yield relative to the senescent control. Studies in India found that various Stg QTLs affected both transpiration and transpiration efficiency, although these effects depended on the interaction between genetic background (S35 and R16) and individual QTLs. The yield variation unexplained by harvest index was related to transpiration efficiency in S35 (R2 = 0.29) and R16 (R2 = 0.72), and was related to total water extracted in S35 (R2 = 0.41) but not in R16. Finally, sixty-eight stay-green enriched lines were evaluated in six countries in sub-Saharan Africa during the 2013/14 season. Analysis of the data from Kenya indicates that stay-green and grain size were positively correlated at two sites: Kiboko (high yielding, r2=0.25) and Masongaleni (low yielding, r2=0.37). Together, these studies suggest that stay-green is a beneficial trait for sorghum production in the semi-arid tropics and is a consequence of traits altering the plant water budget.
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Claims 14
Claim · model-written summary
The stay-green trait enhances sorghum grain yield under post-anthesis drought in three regions.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e0“the stay-green drought adaptation trait enhances sorghum grain yield under post-anthesis drought in these three regions”
Claim · model-written summary
In north-eastern Australian breeding trials, stay-green and yield were positively related.
- Outcome
- yielde1
- Direction
- positivee1
- Qualifier
- sampled 1668 unique hybrid combinations and 23 environmentse2
- Setting
- north-eastern Australiae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e1“A positive relationship between stay-green and yield was generally found in breeding trials in north-eastern Australia”
e2“sampled 1668 unique hybrid combinations and 23 environments”
Claim · model-written summary
Introgressing four Stg QTLs into a senescent background gave higher grain yield than the senescent control.
- Treatment
- introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent backgrounde3
- Gene
- Stg1–4e3
- Outcome
- grain yielde3
- Direction
- highere3
- Comparator
- senescent controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e3“introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent background reduced water demand before flowering and hence increased water supply during grain filling, resulting in higher grain yield relative to the senescent control”
Claim · model-written summary
Introgressing four Stg QTLs into a senescent background reduced water demand before flowering.
- Treatment
- introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent backgrounde3
- Gene
- Stg1–4e3
- Outcome
- water demand before floweringe3
- Direction
- reducede3
- Comparator
- senescent controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e3“introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent background reduced water demand before flowering and hence increased water supply during grain filling, resulting in higher grain yield relative to the senescent control”
Claim · model-written summary
Introgressing four Stg QTLs into a senescent background increased water supply during grain filling.
- Treatment
- introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent backgrounde3
- Gene
- Stg1–4e3
- Outcome
- water supply during grain fillinge3
- Direction
- increasede3
- Comparator
- senescent controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e3“introgressing four individual stay-green (Stg1–4) quantitative trait loci (QTLs) into a senescent background reduced water demand before flowering and hence increased water supply during grain filling, resulting in higher grain yield relative to the senescent control”
Claim · model-written summary
Various Stg QTLs affected transpiration and transpiration efficiency in India, depending on genetic background.
- Material
- S35 and R16e4
- Gene
- Stg QTLse4
- Outcome
- transpiration and transpiration efficiencye4
- Qualifier
- these effects depended on the interactione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e4“various Stg QTLs affected both transpiration and transpiration efficiency, although these effects depended on the interaction between genetic background (S35 and R16) and individual QTLs”
Claim · model-written summary
Yield variation unexplained by harvest index was related to transpiration efficiency in S35 (R2 = 0.29).
- Material
- S35e5
- Outcome
- yield variation unexplained by harvest indexe5
- Value
- R2 = 0.29e5
- Qualifier
- transpiration efficiencye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e5“The yield variation unexplained by harvest index was related to transpiration efficiency in S35 (R2 = 0.29) and R16 (R2 = 0.72), and was related to total water extracted in S35 (R2 = 0.41) but not in R16”
Claim · model-written summary
Yield variation unexplained by harvest index was related to transpiration efficiency in R16 (R2 = 0.72).
- Material
- R16e5
- Outcome
- yield variation unexplained by harvest indexe5
- Value
- R2 = 0.72e5
- Qualifier
- transpiration efficiencye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e5“The yield variation unexplained by harvest index was related to transpiration efficiency in S35 (R2 = 0.29) and R16 (R2 = 0.72), and was related to total water extracted in S35 (R2 = 0.41) but not in R16”
Claim · model-written summary
Yield variation unexplained by harvest index was related to total water extracted in S35 (R2 = 0.41).
- Material
- S35e5
- Outcome
- yield variation unexplained by harvest indexe5
- Value
- R2 = 0.41e5
- Qualifier
- total water extractede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e5“The yield variation unexplained by harvest index was related to transpiration efficiency in S35 (R2 = 0.29) and R16 (R2 = 0.72), and was related to total water extracted in S35 (R2 = 0.41) but not in R16”
Claim · model-written summary
Yield variation unexplained by harvest index was not related to total water extracted in R16.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e5“The yield variation unexplained by harvest index was related to transpiration efficiency in S35 (R2 = 0.29) and R16 (R2 = 0.72), and was related to total water extracted in S35 (R2 = 0.41) but not in R16”
Claim · model-written summary
In Kenya, stay-green and grain size were positively correlated at Kiboko (r2=0.25).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e6“Analysis of the data from Kenya indicates that stay-green and grain size were positively correlated at two sites: Kiboko (high yielding, r2=0.25) and Masongaleni (low yielding, r2=0.37)”
Claim · model-written summary
In Kenya, stay-green and grain size were positively correlated at Masongaleni (r2=0.37).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e6“Analysis of the data from Kenya indicates that stay-green and grain size were positively correlated at two sites: Kiboko (high yielding, r2=0.25) and Masongaleni (low yielding, r2=0.37)”
Claim · model-written summary
Stay-green is a beneficial trait for sorghum production in the semi-arid tropics.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e7“Together, these studies suggest that stay-green is a beneficial trait for sorghum production in the semi-arid tropics”
Claim · model-written summary
Stay-green is a consequence of traits altering the plant water budget.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sorghum Production”
e7“stay-green is a beneficial trait for sorghum production in the semi-arid tropics and is a consequence of traits altering the plant water budget”
The same questions in other papers
transgenic · yield · SorghumPositive and negative results
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See all 5 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.