Abstract
Reduced tillering cereals have been proposed as being advantageous under terminal drought conditions through their reported reduction in non-productive tiller number and reduced soil water use prior to anthesis. This study was conducted to determine whether wheat (Triticum aestivum L.) lines containing the tiller inhibition (tin) gene have a yield penalty over their commercial near-isogenic counterparts. A terminal drought was experienced in all experiments. The effects of the tin gene were investigated in 4 different near-isogenic pairs of lines grown at 2 sowing densities at 4 locations in the eastern Australian wheatbelt over a 3-year period. Averaged over all experiments and lines, grain yield was unaffected by the presence of the tin gene. However, the highest yielding line contained the tin gene and its yield was 5% higher than all other lines. Averaged across the different genetic backgrounds, the tin gene decreased fertile spike number by 11%, increased the number of kernels/spike by 9%, and there was a 2% increase in kernel weight. The tin gene increased the harvest index by an average of 0.02, whereas above-ground biomass was reduced by 7%. Increasing sowing density from 50 to 100 kg/ha had little influence on yield or yield-related characteristics in both the restricted tillering and freely tillering lines. There was an interaction between sowing rate and the presence of the tin gene on yield, with tin lines yielding 0.2 t/ha more than the freely tillering lines at the higher sowing rate, whereas there was no effect at the lower sowing rate. The response of several lines containing the tin gene to nitrogen fertiliser was also investigated at 2 sites. Nitrogen increased spike number in all lines but the number remained around 20% less than in the freely tillering cultivars. The yield of wheat lines containing the tin gene was 6% greater than their near-isogenic pairs where nitrogen status was high in the presence of terminal drought. Grain protein concentration was unaffected by the presence of the tin gene at high grain protein sites, whereas at lower grain protein sites it had a positive effect.
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Claims 14
Claim · model-written summary
The highest yielding tin line yielded 5% more than all other lines.
- Taxon
- wheat
Triticum aestivumt0 - Material
- the highest yielding linee3
- Gene
- tin genee3
- Outcome
- yielde3
- Direction
- highere3
- Value
- 5%e3
- Comparator
- all other linese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the highest yielding line contained the tin gene and its yield was 5% higher than all other lines”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
The tin gene decreased fertile spike number by 11%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- the tin genee4
- Outcome
- fertile spike numbere4
- Direction
- decreasede4
- Value
- 11%e4
- Qualifier
- Averaged across the different genetic backgroundse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Averaged across the different genetic backgrounds, the tin gene decreased fertile spike number by 11%, increased the number of kernels/spike by 9%, and there was a 2% increase in kernel weight”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
The tin gene increased the number of kernels per spike by 9%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- the tin genee4
- Outcome
- number of kernels/spikee4
- Direction
- increasede4
- Value
- 9%e4
- Qualifier
- Averaged across the different genetic backgroundse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Averaged across the different genetic backgrounds, the tin gene decreased fertile spike number by 11%, increased the number of kernels/spike by 9%, and there was a 2% increase in kernel weight”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
The tin gene increased kernel weight by 2%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- the tin genee4
- Outcome
- kernel weighte4
- Direction
- increasee4
- Value
- 2%e4
- Qualifier
- Averaged across the different genetic backgroundse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Averaged across the different genetic backgrounds, the tin gene decreased fertile spike number by 11%, increased the number of kernels/spike by 9%, and there was a 2% increase in kernel weight”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
The tin gene increased harvest index by 0.02.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- The tin genee5
- Outcome
- harvest indexe5
- Direction
- increasede5
- Value
- 0.02e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The tin gene increased the harvest index by an average of 0.02, whereas above-ground biomass was reduced by 7%”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
The tin gene reduced above-ground biomass by 7%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- The tin genee5
- Outcome
- above-ground biomasse5
- Direction
- reducede5
- Value
- 7%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The tin gene increased the harvest index by an average of 0.02, whereas above-ground biomass was reduced by 7%”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
Increasing sowing density from 50 to 100 kg/ha had little influence on yield or yield-related characteristics of restricted and freely tillering lines.
- Taxon
- wheatTriticum aestivumt0
- Material
- restricted tillering and freely tillering linese6
- Treatment
- Increasing sowing density from 50 to 100 kg/hae6
- Outcome
- yield or yield-related characteristicse6
- Direction
- had little influencee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Increasing sowing density from 50 to 100 kg/ha had little influence on yield or yield-related characteristics in both the restricted tillering and freely tillering lines”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
At the higher sowing rate, tin lines yielded 0.2 t/ha more than freely tillering lines.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- the presence of the tin genee7
- Outcome
- yielde7
- Direction
- moree7
- Value
- 0.2 t/hae7
- Qualifier
- at the higher sowing ratee7
- Comparator
- the freely tillering linese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“There was an interaction between sowing rate and the presence of the tin gene on yield, with tin lines yielding 0.2 t/ha more than the freely tillering lines at the higher sowing rate, whereas there was no effect at the lower sowing rate”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
At the lower sowing rate, the tin gene had no effect on yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- the presence of the tin genee7
- Outcome
- yielde7
- Direction
- no effecte7
- Qualifier
- at the lower sowing ratee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“There was an interaction between sowing rate and the presence of the tin gene on yield, with tin lines yielding 0.2 t/ha more than the freely tillering lines at the higher sowing rate, whereas there was no effect at the lower sowing rate”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
Nitrogen increased spike number in all lines.
- Taxon
- wheatTriticum aestivumt0
- Material
- all linese0
- Treatment
- Nitrogene0
- Outcome
- spike numbere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen increased spike number in all lines but the number remained around 20% less than in the freely tillering cultivars”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
Spike number in tin lines remained about 20% lower than in freely tillering cultivars.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- spike numbere0
- Direction
- lesse0
- Value
- around 20%e0
- Comparator
- freely tillering cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen increased spike number in all lines but the number remained around 20% less than in the freely tillering cultivars”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
Wheat lines containing the tin gene yielded 6% more than their near-isogenic pairs under high nitrogen status and terminal drought.
- Taxon
- wheatTriticum aestivume0
- Material
- lines containing the tin genee0
- Treatment
- terminal droughte0
- Outcome
- yielde0
- Direction
- greatere0
- Value
- 6%e0
- Qualifier
- where nitrogen status was highe0
- Comparator
- their near-isogenic pairse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of wheat lines containing the tin gene was 6% greater than their near-isogenic pairs where nitrogen status was high in the presence of terminal drought”
Claim · model-written summary
Grain protein concentration was unaffected by the tin gene at high grain protein sites.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- presence of the tin genee0
- Outcome
- Grain protein concentratione0
- Direction
- unaffectede0
- Qualifier
- at high grain protein sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain protein concentration was unaffected by the presence of the tin gene at high grain protein sites, whereas at lower grain protein sites it had a positive effect”
t0“tiller inhibition gene (tin) in wheat”
Claim · model-written summary
The tin gene had a positive effect on grain protein concentration at lower grain protein sites.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- presence of the tin genee0
- Outcome
- Grain protein concentratione0
- Direction
- positive effecte0
- Qualifier
- at lower grain protein sitese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain protein concentration was unaffected by the presence of the tin gene at high grain protein sites, whereas at lower grain protein sites it had a positive effect”
t0“tiller inhibition gene (tin) in wheat”
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See all 632 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.