Abstract
Four winter wheat ( Triticum aestivum ) cultivars and three two‐component cultivar mixtures were planted in a replacement series both inoculated with or protected from yellow rust ( Puccinia striiformis ) in three environments. Each cultivar was susceptible to one or two of the rust races used. Mixtures yielded, on average, 7 and 4% more than their component pure stand means under inoculated and rust‐free conditions, respectively. Though all yield components were affected by yellow rust, seed weight was the component that was most consistently influenced. The component genotypes within mixtures varied considerably with respect to yield, and the yield of the same component cultivar included in different mixtures sometimes differed significantly. The correlation between yellow rust severity/tiller and grain yield/tiller in mixture differed among cultivars and depended on their companion cultivar. Variance component analysis indicated that yellow rust was the most important experimental variable influencing grain yield. There was no relationship between yield of the cultivars in pure stands and their yields or competitive abilities in mixture. Disease did not change the competitive ranking of cultivars in mixture. Mixtures with complementary, negative, and overcompensatory interactions were identified. On average, mixtures showed no greater yield stability than did pure stands.
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Claims 11
Claim · model-written summary
Cultivar mixtures yielded on average 7% more than their component pure stands under inoculated yellow rust conditions.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Mixturese1
- Interactor
- yellow ruste0pathogen
- Outcome
- yielde1
- Direction
- moree1
- Value
- 7e1
- Qualifier
- inoculated withe0
- Comparator
- component pure stand meanse1
- Setting
- three environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e0“both inoculated with or protected from yellow rust ( Puccinia striiformis ) in three environments”
e1“Mixtures yielded, on average, 7 and 4% more than their component pure stand means”
Claim · model-written summary
Cultivar mixtures yielded on average 4% more than their component pure stands when protected from yellow rust.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Mixturese1
- Interactor
- yellow ruste0pathogen
- Outcome
- yielde1
- Direction
- moree1
- Value
- 4%e1
- Qualifier
- protected from yellow ruste0
- Comparator
- component pure stand meanse1
- Setting
- three environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e0“both inoculated with or protected from yellow rust ( Puccinia striiformis ) in three environments”
e1“Mixtures yielded, on average, 7 and 4% more than their component pure stand means”
Claim · model-written summary
Yellow rust affected all yield components of wheat, and seed weight was the component most consistently influenced.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- yellow ruste2pathogen
- Outcome
- seed weighte2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e2“Though all yield components were affected by yellow rust, seed weight was the component that was most consistently influenced”
Claim · model-written summary
The correlation between yellow rust severity per tiller and grain yield per tiller in mixtures differed among cultivars and depended on the companion cultivar.
- Taxon
- wheatTriticum aestivumt0
- Material
- cultivarse3
- Interactor
- yellow ruste3pathogen
- Outcome
- grain yield/tillere3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e3“The correlation between yellow rust severity/tiller and grain yield/tiller in mixture differed among cultivars and depended on their companion cultivar”
Claim · model-written summary
In a variance component analysis yellow rust was the most important experimental variable influencing grain yield.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- yellow ruste4pathogen
- Outcome
- grain yielde4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e4“Variance component analysis indicated that yellow rust was the most important experimental variable influencing grain yield”
Claim · model-written summary
There was no relationship between the yield of cultivars in pure stands and their competitive abilities in mixture.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- competitive abilities in mixturee5
- Comparator
- yield of the cultivars in pure standse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e5“There was no relationship between yield of the cultivars in pure stands and their yields or competitive abilities in mixture”
Claim · model-written summary
Disease did not change the competitive ranking of cultivars in mixture.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Diseasee6
- Outcome
- competitive ranking of cultivars in mixturee6
- Direction
- did not changee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e6“Disease did not change the competitive ranking of cultivars in mixture”
Claim · model-written summary
Mixtures with complementary, negative and overcompensatory interactions were identified.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- complementary, negative, and overcompensatory interactionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e7“Mixtures with complementary, negative, and overcompensatory interactions were identified”
Claim · model-written summary
On average, cultivar mixtures showed no greater yield stability than pure stands.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- mixturese1
- Outcome
- yield stabilitye1
- Direction
- no greatere1
- Comparator
- pure standse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e1“On average, mixtures showed no greater yield stability than did pure stands”
Claim · model-written summary
Each wheat cultivar was susceptible to one or two of the rust races used.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- rust racese1pathogen
- Outcome
- susceptiblee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e1“Each cultivar was susceptible to one or two of the rust races used”
Claim · model-written summary
Component genotypes varied considerably in yield within mixtures, and the yield of the same component cultivar differed significantly between mixtures in some cases.
- Taxon
- wheatTriticum aestivumt0
- Material
- component genotypese1
- Outcome
- the yield of the same component cultivar included in different mixturese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“yield and yield components of wheat”
e1“The component genotypes within mixtures varied considerably with respect to yield, and the yield of the same component cultivar included in different mixtures sometimes differed significantly”