Abstract
There is no reliable indicator for identifying Zn‐deficiency tolerant genotypes with high grain yield. The aim of this investigation was to compare the grain yield response of 30 spring and 20 winter bread wheat ( Triticum aestivum L.) genotypes to Zn fertilization under field condition and to select high grain yield Zn‐deficiency tolerant genotypes using a stress tolerance indicator. The stress tolerance indicator is a stress tolerance index (STI) used to identify genotypes that produce high yields under both nonstress and stress environments. Two individual trials, each consisting of two field plot experiments, were conducted during the 2006–2007 growing season. Spring wheat genotypes (Trial l) and winter wheat genotypes (Trial 2) were planted in two different locations. Two Zn rates, 0 and 40 kg Zn ha −1 , using ZnSO 4 ·7H 2 O were evaluated. Grain yield varied significantly ( P < 0.01) among wheat genotypes regardless of Zn treatment. Application of Zn fertilizer increased grain yield of spring wheat genotypes an average of 883 and 913 kg ha −1 in Karaj and Isfahan locations, respectively, although considerable variation was found among genotypes in response to Zn fertilization. Zinc efficiency (ZE) significantly differed among wheat genotypes and ranged from 69% to 95% for spring wheat and from 62% to 105% for winter wheat genotypes. Most of the wheat genotypes were placed in group A (genotypes that are not affected by stress) and D (genotypes with low yield in both stress and nonstress environments) based on the STI. The results showed that the STI could be a better selection criterion compared with ZE for identifying high‐yield stress‐tolerant genotypes.
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Claims 7
Claim · model-written summary
Grain yield differed significantly among wheat genotypes regardless of zinc treatment.
- Taxon
- wheat
Triticum aestivume0 - Material
- wheat genotypese0
- Outcome
- Grain yielde0
- Direction
- variede0
- Qualifier
- regardless of Zn treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield varied significantly ( P < 0.01) among wheat genotypes regardless of Zn treatment.”
Claim · model-written summary
Zinc fertilizer increased spring wheat yield by an average 883 kg ha −1 in Karaj.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Zn fertilizere0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 883e0
- Setting
- Karaje0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Zn fertilizer increased grain yield of spring wheat genotypes an average of 883 and 913 kg ha −1 in Karaj and Isfahan locations, respectively”
Claim · model-written summary
Zinc fertilizer increased spring wheat yield by an average 913 kg ha −1 in Isfahan.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Zn fertilizere0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 913 kg ha −1e0
- Setting
- Isfahane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Zn fertilizer increased grain yield of spring wheat genotypes an average of 883 and 913 kg ha −1 in Karaj and Isfahan locations, respectively”
Claim · model-written summary
Zinc efficiency varied significantly among spring wheat genotypes, from 69% to 95%.
- Taxon
- spring wheatTriticum aestivume0
- Outcome
- Zinc efficiencye0
- Direction
- differede0
- Value
- 69% to 95%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc efficiency (ZE) significantly differed among wheat genotypes and ranged from 69% to 95% for spring wheat”
Claim · model-written summary
Zinc efficiency varied significantly among winter wheat genotypes, from 62% to 105%.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- Zinc efficiencye0
- Direction
- differede0
- Value
- 62% to 105%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc efficiency (ZE) significantly differed among wheat genotypes and ranged from 69% to 95% for spring wheat and from 62% to 105% for winter wheat genotypes.”
Claim · model-written summary
Most wheat genotypes were assigned to stress tolerance index groups A and D.
- Taxon
- wheatTriticum aestivume0
- Outcome
- placed in group A (genotypes that are not affected by stress) and D (genotypes with low yield in both stress and nonstress environments)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of the wheat genotypes were placed in group A (genotypes that are not affected by stress) and D (genotypes with low yield in both stress and nonstress environments) based on the STI.”
Claim · model-written summary
The stress tolerance index was judged a better selection criterion than zinc efficiency for high yield under stress.
Not reportedTaxon
Verbatim
e0“The results showed that the STI could be a better selection criterion compared with ZE for identifying high‐yield stress‐tolerant genotypes.”
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See all 3,438 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.