Abstract
Breeding for salt tolerance in crop species, if possible, is an economical approach to overcoming the problem of soil salinity. However, the availability of appropriate genetic variation at the intraspecific and/or interspecific level is a prerequisite for successful progress under selection. Genetic variation for NaCl tolerance at the seedling stage was assessed in nutrient solution culture in forage rape ( Brassica napus L.), berseem clover ( Trifolium alexandrinum L.), alfalfa ( Medicago sativa L.), and red clover ( Trifolium pratense L.). Shoot growth of all species was severely inhibited after 2 weeks of growth in 200, 225, and 250 mmol L −1 NaCl, but there was considerable variability between seedlings. Ten‐thousand seeds of each species were therefore screened for shoot growth at high NaCl concentrations. Selection intensities of < 1% were achieved for all species. Selected plants in two polycrossed populations of each species allowed estimation of realized heritability and narrow‐sense heritability. Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively. It was concluded that significant responses to recurrent selection for seedling NaCl tolerance may be expected in these species.
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Claims 13
Claim · model-written summary
forage rape shoot growth was severely inhibited by sodium chloride.
- Taxon
- forage rapee1
- Treatment
- 200, 225, and 250 mmol L −1 NaCle0
- Outcome
- Shoot growthe0
- Direction
- severely inhibitede0
Not reportedComparator
Verbatim
e0“Shoot growth of all species was severely inhibited after 2 weeks of growth in 200, 225, and 250 mmol L −1 NaCl”
e1“forage rape (”
Claim · model-written summary
berseem clover shoot growth was severely inhibited by sodium chloride.
- Taxon
- berseem clovere1
- Treatment
- 200, 225, and 250 mmol L −1 NaCle0
- Outcome
- Shoot growthe0
- Direction
- severely inhibitede0
Not reportedComparator
Verbatim
e0“Shoot growth of all species was severely inhibited after 2 weeks of growth in 200, 225, and 250 mmol L −1 NaCl”
e1“berseem clover (”
Claim · model-written summary
alfalfa shoot growth was severely inhibited by sodium chloride.
- Taxon
- alfalfa
Medicago sativae1 - Treatment
- 200, 225, and 250 mmol L −1 NaCle0
- Outcome
- Shoot growthe0
- Direction
- severely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot growth of all species was severely inhibited after 2 weeks of growth in 200, 225, and 250 mmol L −1 NaCl”
e1“alfalfa (”
Claim · model-written summary
red clover shoot growth was severely inhibited by sodium chloride.
- Taxon
- red clover
Trifolium pratensee1 - Treatment
- 200, 225, and 250 mmol L −1 NaCle0
- Outcome
- Shoot growthe0
- Direction
- severely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot growth of all species was severely inhibited after 2 weeks of growth in 200, 225, and 250 mmol L −1 NaCl”
e1“red clover (”
Claim · model-written summary
forage rape realized heritability for sodium chloride tolerance was 0.62.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
forage rape narrow sense heritability for sodium chloride tolerance was 0.74.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
berseem clover realized heritability for sodium chloride tolerance was 0.34.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
berseem clover narrow sense heritability for sodium chloride tolerance was 0.50.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
alfalfa realized heritability for sodium chloride tolerance was 0.31.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- Realized heritabilitiese0
- Value
- 0.31e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
alfalfa narrow sense heritability for sodium chloride tolerance was 0.52.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- narrowsense heritabilitiese0
- Value
- 0.52e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
red clover realized heritability for sodium chloride tolerance was 0.57.
- Taxon
- red cloverTrifolium pratensee0
- Outcome
- Realized heritabilitiese0
- Value
- 0.57e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
red clover narrow sense heritability for sodium chloride tolerance was 0.98.
- Taxon
- red cloverTrifolium pratensee0
- Outcome
- narrowsense heritabilitiese0
- Value
- 0.98e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Realized heritabilities were 0.62, 0.34, 0.31, and 0.57 for forage rape, berseem clover, alfalfa, and red clover, while narrowsense heritabilities from parent‐progeny regression, were 0.74, 0.50, 0.52, and 0.98 for those species, respectively”
Claim · model-written summary
Selection intensities below one percent were achieved in all four species.
Not reportedTaxon
Verbatim
e0“Selection intensities of < 1% were achieved for all species”
t0“Four Forage Species”
The same questions in other papers
sodium chloride · growth · Brassica napus (oilseed rape)Results differ
27 papers in the same direction as this paper · 9 in the opposite direction
- positive
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See all 37 papers →sodium chloride · growth · Medicago sativa (alfalfa)Results differ
38 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
39 papers more in this group
See all 43 papers →sodium chloride · growth · Trifolium pratense (red clover)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 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.