Abstract
Abstract Development of a standard evaluation protocol has been a pressing problem for the selection of drought‐resistant genotypes of tall fescue ( Festuca arundinacea ). This study was conducted to evaluate the association of forage yield with specific phenological and morphological traits to find a proper model for indirect selection under irrigated (normal) and drought‐stress conditions in tall fescue. A random sample of seventy‐five genotypes were clonally propagated and evaluated in normal and drought‐stress environments in the field during 2009 and 2010. Results showed that water stress had a negative effect on forage yield and most of the morphological traits measured and reduced genotypic variation for most of them. Forage yield had the highest genotypic variation, whereas days to pollination had the lowest variation. Low broad‐sense heritability estimates were obtained for dry‐matter yield, but heritability for the traits of number of stems per plant, plant height and crown diameter was moderately high. These traits were identified as the main components of forage yield. The importance of these components and their direct and indirect effects on forage yield was different in normal and drought‐stress conditions. This suggests that indirect selection for developing high‐yielding, drought‐tolerant varieties should be performed under drought‐stress conditions with a specific model.
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Claims 8
Claim · model-written summary
Water stress reduced forage yield and most measured morphological traits.
- Taxon
- tall fescue
Lolium arundinaceumt0 - Treatment
- water stresse0
- Outcome
- forage yield and most of the morphological traitse0
- Direction
- negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress had a negative effect on forage yield and most of the morphological traits measured”
t0“tall fescue”
Claim · model-written summary
Water stress reduced genotypic variation for most measured traits.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- water stresse0
- Outcome
- genotypic variatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress had a negative effect on forage yield and most of the morphological traits measured and reduced genotypic variation for most of them”
t0“tall fescue”
Claim · model-written summary
Forage yield had the highest genotypic variation, while days to pollination had the lowest.
- Taxon
- tall fescueLolium arundinaceumt0
- Outcome
- genotypic variatione0
- Direction
- higheste0
- Qualifier
- days to pollination had the lowest variatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage yield had the highest genotypic variation, whereas days to pollination had the lowest variation”
t0“tall fescue”
Claim · model-written summary
Dry matter yield had low broad sense heritability.
- Taxon
- tall fescueLolium arundinaceumt0
- Organ / stage
- dry‐matter yielde0
- Outcome
- broad‐sense heritabilitye0
- Direction
- Lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low broad‐sense heritability estimates were obtained for dry‐matter yield”
t0“tall fescue”
Claim · model-written summary
Stem number, height and crown diameter had moderately high heritability.
- Taxon
- tall fescueLolium arundinaceumt0
- Outcome
- heritabilitye0
- Direction
- moderately highe0
- Qualifier
- number of stems per plant, plant height and crown diametere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heritability for the traits of number of stems per plant, plant height and crown diameter was moderately high”
t0“tall fescue”
Claim · model-written summary
Stem number, height and crown diameter were main components of forage yield.
- Taxon
- tall fescueLolium arundinaceumt0
- Outcome
- main components of forage yielde0
- Qualifier
- These traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These traits were identified as the main components of forage yield”
t0“tall fescue”
Claim · model-written summary
The direct and indirect effects of yield components differed between normal and drought conditions.
- Taxon
- tall fescueLolium arundinaceumt0
- Treatment
- drought‐stress conditionse0
- Outcome
- effects on forage yielde0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The importance of these components and their direct and indirect effects on forage yield was different in normal and drought‐stress conditions”
t0“tall fescue”
Claim · model-written summary
The authors recommend indirect selection for high yielding drought tolerant varieties under drought stress.
- Taxon
- tall fescueLolium arundinaceumt0
- Outcome
- indirect selectione0
- Qualifier
- under drought‐stress conditions with a specific modele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indirect selection for developing high‐yielding, drought‐tolerant varieties should be performed under drought‐stress conditions with a specific model”
t0“tall fescue”
The same questions in other papers
drought · yield · Lolium arundinaceum (tall fescue)Results differ
12 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- negative
10 papers more in this group
See all 14 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.