Abstract
Drought is a critical constraint for legume production in semi-arid regions, yet breeding for drought tolerance in faba bean through induced mutagenesis remains largely unexplored. To our knowledge, this is the first EMS-derived mutant population in faba bean specifically developed for drought tolerance, comprising 45 M2/M3 lines derived from small-seeded cv. Zina and large-seeded cv. Aguadulce Superlonga), evaluated under two irrigation regimes—100% field capacity (well-watered control) and 40% field capacity (severe stress)—over two consecutive growing seasons in a randomized complete block design with three replications. Drought stress caused severe yield losses, reducing mean seed number per plant by 42.2% and mean seed weight per plant by 47.1%. Analysis of variance revealed highly significant effects of genotype, irrigation, and generation/year on both yield components. The non-significant genotype × irrigation interaction indicated similar proportional drought response across genotypes, while the non-significant three-way interaction suggested relatively consistent genotype rankings across generations/growing seasons. Among the ten drought tolerance indices evaluated, seed-number-based mean productivity (MPn) and stress tolerance index (STIn) were the most discriminating, whereas weight-based indices failed to differentiate genotypes due to the inherent seed-size contrast between botanical backgrounds. Dunnett’s comparisons identified genotype 23 (Zina-derived) as the top performer, significantly exceeding its parent for both MPn and STIn; genotypes 22, 24, 12, 3, and 15 similarly outperformed controls. Cluster analysis broadly distinguished three groups: a tolerant cluster dominated by Zina-derived lines, a moderately tolerant cluster (Zina wild-type), and a sensitive cluster of Aguadulce Superlonga-derived lines. These findings suggest that EMS mutagenesis generated potentially heritable and exploitable variation for drought tolerance, with selected lines representing promising candidates for further multi-environment validation.
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Claims 14
Claim · model-written summary
Drought stress reduced mean seed number per plant by 42.2%.
- Taxon
- Vicia faba L.
Vicia fabat0 - Treatment
- Drought stresse0
- Outcome
- mean seed number per plante0
- Direction
- reducinge0
- Value
- 42.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress caused severe yield losses, reducing mean seed number per plant by 42.2% and mean seed weight per plant by 47.1%.”
t0“Vicia faba L.”
Claim · model-written summary
Drought stress reduced mean seed weight per plant by 47.1%.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- Drought stresse0
- Outcome
- mean seed weight per plante0
- Direction
- reducinge0
- Value
- 47.1%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress caused severe yield losses, reducing mean seed number per plant by 42.2% and mean seed weight per plant by 47.1%.”
t0“Vicia faba L.”
Claim · model-written summary
Genotype, irrigation and generation/year each had highly significant effects on both yield components.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- irrigatione0
- Outcome
- both yield componentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of variance revealed highly significant effects of genotype, irrigation, and generation/year on both yield components.”
t0“Vicia faba L.”
Claim · model-written summary
The genotype by irrigation interaction was not significant, indicating similar proportional drought responses across genotypes.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- genotype × irrigation interactione0
- Outcome
- proportional drought responsee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The non-significant genotype × irrigation interaction indicated similar proportional drought response across genotypes”
t0“Vicia faba L.”
Claim · model-written summary
The three-way interaction was not significant, suggesting consistent genotype rankings across generations.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- three-way interactione0
- Outcome
- genotype rankingse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the non-significant three-way interaction suggested relatively consistent genotype rankings across generations/growing seasons.”
t0“Vicia faba L.”
Claim · model-written summary
seed-number-based mean productivity (MPn) was among the most discriminating drought tolerance indices.
- Taxon
- Vicia faba L.Vicia fabat0
- Outcome
- most discriminatinge0
- Comparator
- weight-based indicese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed-number-based mean productivity (MPn) and stress tolerance index (STIn) were the most discriminating”
t0“Vicia faba L.”
e1“whereas weight-based indices failed to differentiate genotypes due to the inherent seed-size contrast between botanical backgrounds.”
Claim · model-written summary
stress tolerance index (STIn) was among the most discriminating drought tolerance indices.
- Taxon
- Vicia faba L.Vicia fabat0
- Outcome
- most discriminatinge0
- Comparator
- weight-based indicese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed-number-based mean productivity (MPn) and stress tolerance index (STIn) were the most discriminating”
t0“Vicia faba L.”
e1“whereas weight-based indices failed to differentiate genotypes due to the inherent seed-size contrast between botanical backgrounds.”
Claim · model-written summary
Weight-based indices failed to differentiate genotypes because of seed-size differences.
- Taxon
- Vicia faba L.Vicia fabat0
- Outcome
- failed to differentiate genotypese0
- Comparator
- seed-size contrast between botanical backgroundse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas weight-based indices failed to differentiate genotypes due to the inherent seed-size contrast between botanical backgrounds.”
t0“Vicia faba L.”
Claim · model-written summary
Genotype 23 significantly exceeded its parent for MPn and STIn.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- genotype 23e0
- Outcome
- MPn and STIne0
- Direction
- exceedinge0
- Comparator
- its parente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dunnett’s comparisons identified genotype 23 (Zina-derived) as the top performer, significantly exceeding its parent for both MPn and STIn”
t0“Vicia faba L.”
Claim · model-written summary
Genotypes 22, 24, 12, 3 and 15 outperformed controls.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- genotypes 22, 24, 12, 3, and 15e0
- Outcome
- outperformed controlse0
- Direction
- outperformede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes 22, 24, 12, 3, and 15 similarly outperformed controls.”
t0“Vicia faba L.”
Claim · model-written summary
Cluster analysis placed Zina-derived lines predominantly in a tolerant cluster.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- Zina-derived linese0
- Outcome
- tolerant clustere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster analysis broadly distinguished three groups: a tolerant cluster dominated by Zina-derived lines, a moderately tolerant cluster (Zina wild-type), and a sensitive cluster of Aguadulce Superlonga-derived lines.”
t0“Vicia faba L.”
Claim · model-written summary
Cluster analysis placed Zina wild-type predominantly in a moderately tolerant cluster.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- Zina wild-typee0
- Outcome
- moderately tolerant clustere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster analysis broadly distinguished three groups: a tolerant cluster dominated by Zina-derived lines, a moderately tolerant cluster (Zina wild-type), and a sensitive cluster of Aguadulce Superlonga-derived lines.”
t0“Vicia faba L.”
Claim · model-written summary
Cluster analysis placed Aguadulce Superlonga-derived lines predominantly in a sensitive cluster.
- Taxon
- Vicia faba L.Vicia fabat0
- Material
- Aguadulce Superlonga-derived linese0
- Outcome
- sensitive clustere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster analysis broadly distinguished three groups: a tolerant cluster dominated by Zina-derived lines, a moderately tolerant cluster (Zina wild-type), and a sensitive cluster of Aguadulce Superlonga-derived lines.”
t0“Vicia faba L.”
Claim · model-written summary
The authors suggest EMS mutagenesis generated potentially heritable drought-tolerance variation.
- Taxon
- Vicia faba L.Vicia fabat0
- Treatment
- EMS mutagenesise0
- Outcome
- potentially heritable and exploitable variation for drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These findings suggest that EMS mutagenesis generated potentially heritable and exploitable variation for drought tolerance”
t0“Vicia faba L.”
The same questions in other papers
drought · yield · Vicia faba (faba bean)Results differ
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