Abstract
Acidic soils constrain wheat yield in some parts of central and southern New South Wales. This paper describes research designed to evaluate the usefulness of aluminium (Al) tolerance, manganese (Mn) tolerance and the interaction of lime use and Al tolerance in improving wheat yields. Closely related pairs of wheat lines with tolerance and sensitivity of Al and Mn were bred. Carazinho (a Brazilian wheat cultivar) was used as a source of Al tolerance in a backcrossing, recurrent selection program to introduce tolerance into an Egret background (a locally adapted Australian cultivar). Aluminium tolerance was determined using the haematoxylin root tip test and Mn tolerance was determined using a subirrigated gravel bed system. Eight pairs divergent in tolerance of Al were evaluated for their yield on 3 acidic soil types in 5 field experiments. Grain yield increased in Egret-derived lines when Al tolerance from Carazinho was introduced. Yield from the Al-sensitive genotypes (averaged over the 8 pairs) compared with the Al-tolerant genotypes was 0.43 to 0.98 t/ha and 0.88 to 1.38 t/ha respectively on an acid earthy sand in central western New South Wales (Binnaway) in 2 seasons, and 1.08 to 1.96 t/ha and 1.29 to 1.88 t/ha on an acid podsolic soil in southern New South Wales (Borambola). On a moderately acidic red earth site (pH Ca 4.8) at Wagga Wagga, no such advantage accrued to the Al-tolerant group with the average yield for the sensitive and tolerant pairs being 5.00 and 4.78 t/ha, respectively. Manganese tolerance was assessed in only 1 of these experiments (Borambola) using 6 pairs of lines tolerant of Al but with contrasting Mn tolerance. No advantage of Mn tolerance was apparent at this site. At Binnaway the tolerant and sensitive lines responded to lime application with the tolerant lines yielding on average about 0.42 t/ha of grain more than the sensitive lines even when 5 t/ha of lime was applied. At Borambola the tolerant lines yielded 0.59 t/ha of grain more than the sensitive lines when no lime was applied. With lime application this difference in performance disappeared and Al-tolerant and sensitive lines yielded equally. At the Wagga Wagga site, the addition of lime did not affect the yield of the sensitive lines, while the tolerant lines showed a yield depression of 0.32 t/ha of grain with lime application. Three different relationships between lime application and Al tolerance were observed. While 2 relationships fit with our previous understanding, grain yield depression resulting from the combined use of Al tolerance and lime at our least acidic site remains poorly understood.
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Claims 10
Claim · model-written summary
Introducing Carazinho aluminium tolerance increased yield in Egret-derived wheat lines.
Verbatim
e0“Grain yield increased in Egret-derived lines when Al tolerance from Carazinho was introduced.”
Claim · model-written summary
Al-tolerant wheat lines yielded 0.88 to 1.38 t/ha against 0.43 to 0.98 t/ha for sensitive lines at Binnaway.
- Taxon
- wheat
Triticum aestivumt0 - Material
- Al-tolerant genotypese0
- Outcome
- Yielde0
- Direction
- Al-tolerante0
- Value
- 0.88 to 1.38 t/hae0
- Qualifier
- 0.43 to 0.98 t/hae0
- Comparator
- Al-sensitive genotypese0
- Setting
- Binnawaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield from the Al-sensitive genotypes (averaged over the 8 pairs) compared with the Al-tolerant genotypes was 0.43 to 0.98 t/ha and 0.88 to 1.38 t/ha respectively on an acid earthy sand in central western New South Wales (Binnaway) in 2 seasons”
t0“wheat yield”
Claim · model-written summary
At Borambola, tolerant wheat genotypes yielded 1.29 to 1.88 t/ha versus 1.08 to 1.96 t/ha for sensitive genotypes.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- 1.29 to 1.88 t/hae0
- Value
- 1.29 to 1.88 t/hae0
- Setting
- Borambolae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1.08 to 1.96 t/ha and 1.29 to 1.88 t/ha on an acid podsolic soil in southern New South Wales (Borambola)”
t0“wheat yield”
Claim · model-written summary
Al tolerance conferred no yield advantage at Wagga Wagga; sensitive and tolerant pairs averaged 5.00 and 4.78 t/ha.
- Taxon
- wheatTriticum aestivumt0
- Material
- Al-tolerant groupe0
- Outcome
- yielde0
- Direction
- no such advantagee0
- Value
- 4.78 t/hae0
- Qualifier
- 5.00e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no such advantage accrued to the Al-tolerant group with the average yield for the sensitive and tolerant pairs being 5.00 and 4.78 t/ha”
t0“wheat yield”
Claim · model-written summary
Manganese tolerance gave no apparent yield advantage at Borambola.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- advantage of Mn tolerancee0
- Direction
- No advantagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No advantage of Mn tolerance was apparent at this site.”
t0“wheat yield”
Claim · model-written summary
At Binnaway, tolerant wheat lines yielded about 0.42 t/ha more than sensitive lines even with 5 t/ha lime.
- Taxon
- wheatTriticum aestivumt0
- Material
- tolerant linese0
- Treatment
- 5 t/ha of limee0
- Outcome
- graine0
- Direction
- moree0
- Value
- about 0.42 t/hae0
- Comparator
- sensitive linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerant lines yielding on average about 0.42 t/ha of grain more than the sensitive lines even when 5 t/ha of lime was applied”
t0“wheat yield”
Claim · model-written summary
At Borambola without lime, tolerant lines yielded 0.59 t/ha more than sensitive lines.
- Taxon
- wheatTriticum aestivumt0
- Material
- tolerant linese0
- Outcome
- graine0
- Direction
- moree0
- Value
- 0.59 t/hae0
- Qualifier
- no limee0
- Comparator
- sensitive linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerant lines yielded 0.59 t/ha of grain more than the sensitive lines when no lime was applied”
t0“wheat yield”
Claim · model-written summary
Lime eliminated the yield difference between tolerant and sensitive lines at Borambola.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- lime applicatione0
- Outcome
- yielded equallye0
- Direction
- disappearede0
- Comparator
- Al-tolerant and sensitive linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With lime application this difference in performance disappeared and Al-tolerant and sensitive lines yielded equally.”
t0“wheat yield”
Claim · model-written summary
At Wagga Wagga lime did not affect sensitive-line yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- addition of limee0
- Outcome
- yield of the sensitive linese0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of lime did not affect the yield of the sensitive lines”
t0“wheat yield”
Claim · model-written summary
At Wagga Wagga lime depressed tolerant-line grain yield by 0.32 t/ha.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- lime applicatione0
- Outcome
- yielde0
- Direction
- depressione0
- Value
- 0.32 t/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tolerant lines showed a yield depression of 0.32 t/ha of grain with lime application”
t0“wheat yield”
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lime · yield · Triticum aestivum (wheat)Positive and negative results
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