Abstract
Early vigour, or faster early leaf area development, has been considered an important trait for rainfed wheat in dryland regions such as Australia. However, early vigour is a genetically complex trait, and results from field experiments have been highly variable. Whether early vigour can lead to improved water use efficiency and crop yields is strongly dependent on climate and management conditions across the entire growing season. Here, we present a modelling framework for simulating the impact of early vigour on wheat growth and yield at eight sites representing the major climate types in Australia. On a typical soil with plant available water capacity (PAWC) of 147 mm, simulated yield increase with early vigour associated with larger seed size was on average 4% higher compared with normal vigour wheat. Early vigour through selection of doubled early leaf sizes could increase yield by 16%. Increase in yield was mainly from increase in biomass and grain number, and was reduced at sites with seasonal rainfall plus initial soil water <300 mm. Opportunities exists for development of early vigour wheat varieties for wetter sites. Soil PAWC could play a significant role in delivering the benefit of early vigour and would require particular attention.
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Claims 6
Claim · model-written summary
Early vigour from larger seed size increased simulated yield by 4% over normal vigour wheat on the specified soil.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- early vigour associated with larger seed sizee0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 4%e0
- Qualifier
- plant available water capacity (PAWC) of 147 mme0
- Comparator
- normal vigour wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On a typical soil with plant available water capacity (PAWC) of 147 mm, simulated yield increase with early vigour associated with larger seed size was on average 4% higher compared with normal vigour wheat.”
Claim · model-written summary
Doubling early leaf sizes could increase simulated wheat yield by 16%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- doubled early leaf sizese0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early vigour through selection of doubled early leaf sizes could increase yield by 16%.”
t0“wheat”
Claim · model-written summary
Simulated yield gains arose mainly from increased biomass and grain number.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- yielde0
- Qualifier
- increase in biomass and grain numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in yield was mainly from increase in biomass and grain number”
t0“wheat”
Claim · model-written summary
Yield gains were reduced at sites with rainfall plus initial soil water below 300 mm.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- yieldt0
- Direction
- reducede0
- Qualifier
- seasonal rainfall plus initial soil water <300 mme0
- Setting
- sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was reduced at sites with seasonal rainfall plus initial soil water <300 mm.”
t0“wheat yield”
Claim · model-written summary
The authors identify wetter sites as opportunities for early vigour wheat varieties.
- Taxon
- wheatTriticum aestivume0
- Outcome
- development of early vigour wheat varieties for wetter sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Opportunities exists for development of early vigour wheat varieties for wetter sites.”
Claim · model-written summary
The authors advise attention to soil PAWC to obtain early vigour benefits.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- particular attentione0
- Qualifier
- Soil PAWCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil PAWC could play a significant role in delivering the benefit of early vigour and would require particular attention.”
t0“wheat”
The same questions in other papers
property · yield · Triticum aestivum (wheat)Positive and negative results
10 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
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See all 14 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.