Abstract
Twenty‐three mixtures of barley ( Hordeum vulgare L.) varieties were compared with their components for yielding ability and for yield stability at five locations in California over 2 years. The mixtures had a small advantage in yield over the average of the varieties but were inferior to their components in stability of yield. The yield advantage of mixtures decreased when environmental heterogeneity was reduced by excluding data from the most extreme location. The number or diversity of components in a mixture appeared unrelated to its yield. Certain F 2 populations, included in the second year, were higher yielding but less stable than their parents. It was concluded that simple varietal mixtures have limited commercial possibilities and that special breeding programs may be necessary if favorable inter‐genotypic interactions are to be utilized.
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Claims 8
Claim · model-written summary
Barley varietal mixtures gave a small yield advantage over the average of their component varieties
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- mixturese1
- Outcome
- yielde1
- Direction
- higherinferrede1
- Comparator
- average of the varietiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e1“The mixtures had a small advantage in yield over the average of the varieties but were inferior to their components in stability of yield”
Claim · model-written summary
Barley varietal mixtures were inferior to their components in stability of yield
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- mixturese1
- Outcome
- stability of yielde1
- Direction
- inferiore1
- Comparator
- componentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e1“The mixtures had a small advantage in yield over the average of the varieties but were inferior to their components in stability of yield”
Claim · model-written summary
The yield advantage of barley mixtures decreased when the most extreme location was excluded to reduce environmental heterogeneity
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- excluding data from the most extreme locatione2
- Outcome
- yield advantage of mixturese2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e2“The yield advantage of mixtures decreased when environmental heterogeneity was reduced by excluding data from the most extreme location”
Claim · model-written summary
The number or diversity of components in a barley mixture was unrelated to its yield
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- number or diversity of components in a mixturee3
- Outcome
- yielde3
- Direction
- no_changeinferrede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e3“The number or diversity of components in a mixture appeared unrelated to its yield”
Claim · model-written summary
Certain F2 barley populations were higher yielding than their parents
- Taxon
- BarleyHordeum vulgaret0
- Material
- F 2 populationse4
- Outcome
- yieldinge4
- Direction
- higher yieldinge4
- Comparator
- their parentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e4“Certain F 2 populations, included in the second year, were higher yielding but less stable than their parents”
Claim · model-written summary
Certain F2 barley populations were less stable than their parents
- Taxon
- BarleyHordeum vulgaret0
- Material
- F 2 populationse4
- Outcome
- stablee4
- Direction
- less stablee4
- Comparator
- their parentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e4“Certain F 2 populations, included in the second year, were higher yielding but less stable than their parents”
Claim · model-written summary
Simple varietal mixtures have limited commercial possibilities
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- limited commercial possibilitiese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e5“It was concluded that simple varietal mixtures have limited commercial possibilities”
Claim · model-written summary
Special breeding programs may be necessary to use favorable inter-genotypic interactions in barley
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- special breeding programse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“A Comparison of the Performance of Homogeneous and Heterogeneous Barley Populations1”
e6“special breeding programs may be necessary”
The same questions in other papers
climate site · yield · Hordeum vulgare (barley)Positive and negative results
9 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.