Paper · 2020 · Global Change Biology

A reduced‐tillering trait shows small but important yield gains in dryland wheat production

Alireza Houshmandfar; Noboru Ota; Garry J. O'Leary; et al.

6
claims
12
verbatim quotes
12
citations
2
research areas
✓
Open access

Abstract

Abstract Reducing the number of tillers per plant using a t iller in hibition ( tin ) gene has been considered as an important trait for wheat production in dryland environments. We used a spatial analysis approach with a daily time‐step coupled radiation and transpiration efficiency model to simulate the impact of the reduced‐tillering trait on wheat yield under different climate change scenarios across Australia's arable land. Our results show a small but consistent yield advantage of the reduced‐tillering trait in the most water‐limited environments both under current and likely future conditions. Our climate scenarios show that whilst elevated [CO 2 ] (e[CO 2 ]) alone might limit the area where the reduced‐tillering trait is advantageous, the most likely climate scenario of e[CO 2 ] combined with increased temperature and reduced rainfall consistently increased the area where restricted tillering has an advantage. Whilst long‐term average yield advantages were small (ranged from 31 to 51 kg ha −1 year −1 ), across large dryland areas the value is large (potential cost‐benefits ranged from Australian dollar 23 to 60 MIL/year). It seems therefore worthwhile to further explore this reduced‐tillering trait in relation to a range of different environments and climates, because its benefits are likely to grow in future dry environments where wheat is grown around the world.

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Claims 6

Intervention effectobservedoriginal resultpositivesimulated

Claim · model-written summary

Reduced tillering gave a small consistent wheat yield advantage in the most water-limited environments under current and likely future conditions.

Treatment
reduced‐tillering traite0
Outcome
yield advantagee0
Direction
advantagee0
Qualifier
most water‐limited environmentse0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“wheat”

✓ located verbatim in the source · title, characters 75–80 · show in text ↑
e0

“Our results show a small but consistent yield advantage of the reduced‐tillering trait in the most water‐limited environments both under current and likely future conditions.”

✓ located verbatim in the source · abstract, characters 433–607 · show in text ↑
Intervention effectobservedoriginal resultnegativeprojected

Claim · model-written summary

Elevated CO2 alone might limit the area with a reduced tillering advantage.

Treatment
elevated [CO 2 ]e0
Outcome
area where the reduced‐tillering trait is advantageouse0
Direction
limite0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“wheat”

✓ located verbatim in the source · title, characters 75–80 · show in text ↑
e0

“elevated [CO 2 ] (e[CO 2 ]) alone might limit the area where the reduced‐tillering trait is advantageous”

✓ located verbatim in the source · abstract, characters 647–751 · show in text ↑
Intervention effectobservedoriginal resultpositiveprojected

Claim · model-written summary

Elevated CO2 with increased temperature and reduced rainfall increased the area with restricted tillering advantage.

Treatment
e[CO 2 ] combined with increased temperature and reduced rainfalle0
Outcome
area where restricted tillering has an advantagee0
Direction
increasede0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“wheat”

✓ located verbatim in the source · title, characters 75–80 · show in text ↑
e0

“e[CO 2 ] combined with increased temperature and reduced rainfall consistently increased the area where restricted tillering has an advantage.”

✓ located verbatim in the source · abstract, characters 789–931 · show in text ↑
Observationobservedoriginal resultpositivesimulated

Claim · model-written summary

Long-term average wheat yield advantages ranged from 31 to 51 kg ha −1 year −1.

Outcome
long‐term average yield advantagese0
Direction
advantagese0
Value
31 to 51 kg ha −1 year −1e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“wheat”

✓ located verbatim in the source · title, characters 75–80 · show in text ↑
e0

“long‐term average yield advantages were small (ranged from 31 to 51 kg ha −1 year −1 )”

✓ located verbatim in the source · abstract, characters 939–1025 · show in text ↑
Observationobservedoriginal resultpositiveprojected

Claim · model-written summary

Potential cost benefits across dryland areas ranged from Australian dollar 23 to 60 MIL/year.

Outcome
potential cost‐benefitse0
Value
Australian dollar 23 to 60 MIL/yeare0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“wheat”

✓ located verbatim in the source · title, characters 75–80 · show in text ↑
e0

“potential cost‐benefits ranged from Australian dollar 23 to 60 MIL/year”

✓ located verbatim in the source · abstract, characters 1074–1145 · show in text ↑
Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

The authors recommend further exploration of reduced tillering across environments and climates.

Outcome
further explore this reduced‐tillering traite0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“wheat”

✓ located verbatim in the source · title, characters 75–80 · show in text ↑
e0

“It seems therefore worthwhile to further explore this reduced‐tillering trait in relation to a range of different environments and climates”

✓ located verbatim in the source · abstract, characters 1148–1287 · show in text ↑

rainfall · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results

10 papers: 3 positive, 7 negative or no effect

2 papers in the same direction as this paper · 7 in the opposite direction

  1. negative
  2. negative
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co2 · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results

97 papers: 69 positive, 28 negative or no effect

68 papers in the same direction as this paper · 28 in the opposite direction

  1. negative
  2. negative
  3. no effect

93 papers more in this group

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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.