Abstract
Abstract Drought is one of the major abiotic stresses that frequently causes severe loss in crop yield worldwide. Laboratory predictors of field drought tolerance could significantly increase the effectiveness of existing plant breeding programs. In earlier field experiments, drought tolerance of 22 cultivated barley varieties has already been quantified. In order to develop laboratory markers of drought sensitivity, field drought tolerance data were correlated with parameters obtained in laboratory tests. Root and shoot length and weight were measured on control and PEG-treated (a simple laboratory drought model) seedlings. Significant correlations were found among root growth, shoot weight in laboratory stress conditions and field drought tolerance. Interestingly, a negative correlation was found between root length of the untreated seedlings and drought tolerance. Laboratory Drought Tolerance Index (DTI) was introduced as the linear combination of those laboratory parameters which were correlated with field drought tolerance. DTI showed good predictive value (r = 0.57, p < 0.05) for drought tolerance in field experiments and we suggest it for preselection of drought tolerant barley breeding lines and for the characterization of drought tolerance in general.
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Claims 5
Claim · model-written summary
Root growth under laboratory stress correlated with field drought tolerance.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Organ / stage
- root growthe0
- Outcome
- field drought tolerancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“barley”
e0“Significant correlations were found among root growth, shoot weight in laboratory stress conditions and field drought tolerance”
Claim · model-written summary
Shoot weight under laboratory stress correlated with field drought tolerance.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- shoot weighte0
- Outcome
- field drought tolerancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“Significant correlations were found among root growth, shoot weight in laboratory stress conditions and field drought tolerance”
Claim · model-written summary
Untreated seedling root length negatively correlated with drought tolerance.
- Taxon
- barleyHordeum vulgaret0
- Organ / stage
- root lengthe0
- Outcome
- drought tolerancee0
- Direction
- negative correlatione0
- Qualifier
- untreated seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“a negative correlation was found between root length of the untreated seedlings and drought tolerance”
Claim · model-written summary
The laboratory drought tolerance index predicted field drought tolerance with r = 0.57.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- drought tolerance in field experimentse0
- Value
- r = 0.57e0
- Qualifier
- p < 0.05e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“DTI showed good predictive value (r = 0.57, p < 0.05) for drought tolerance in field experiments”
Claim · model-written summary
The authors suggest DTI for preselection of drought tolerant breeding lines.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- preselection of drought tolerant barley breeding linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“we suggest it for preselection of drought tolerant barley breeding lines and for the characterization of drought tolerance in general”