Abstract
Salinity is one of the most serious issues in rice cultivation and production. Salt stress significantly reduced seedling growth performance of rice. This research was conducted to study the effects of vegetative stage salinity stress on morphological, biochemical, molecular and genetic variation of 12 rice genotypes as well as 2 check varieties, MR297 (susceptible) and Pokkali (tolerant). The experiment was arranged in a split-plot design with 3 replications. Normal freshwater at 0 dS m-1 (L1), saline water at 6 dS m-1 (L2) and saline water at 12 dS m-1 (L3) were the main plot and rice genotypes were the sub-plot. In general, morphological and biochemical traits of all genotypes showed an overall reduction of about 47.41% in L3 as compared to L1 except for the tolerant check, Pokkali. The genetics and correlation analysis indicated that plant height, leaf size and standard evaluation system (SES) score might be used as a selection criterion in developing salt tolerant rice. The multivariate analysis revealed that a Malaysian landraces, Jarom Mas was clustered together with Pokkali as tolerant genotype. Screening using tightly linked Simple Sequence Repeat (SSR) markers (RM1287, RM10748, RM493) of salinity tolerant QTL, Saltol indicated that this QTL was absence in Jarom Mas. This finding might indicate the presence of other QTL associated with salinity tolerance in Jarom Mas. Further study on identifying the speculated QTL may be conducted to confirm this postulation.
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Claims 5
Claim · model-written summary
Salt stress significantly reduced seedling growth performance of rice relative to normal freshwater.
- Taxon
- rice
Oryza sativae1 - Treatment
- Salt stresse1
- Outcome
- seedling growth performancee1
- Direction
- reducede1
- Comparator
- Normal freshwater at 0 dS m-1 (L1)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Salt stress significantly reduced seedling growth performance of rice”
e2“Normal freshwater at 0 dS m-1 (L1), saline water at 6 dS m-1 (L2) and saline water at 12 dS m-1 (L3)”
Claim · model-written summary
Morphological and biochemical traits of all rice genotypes were reduced by about 47.41% at 12 dS m-1 compared with L1, except for the tolerant check Pokkali.
- Taxon
- riceOryza sativae3
- Treatment
- saline water at 12 dS m-1 (L3)e2
- Outcome
- morphological and biochemical traitse4
- Direction
- reductione4
- Value
- 47.41%e4
- Qualifier
- except for the tolerant check, Pokkalie4
- Comparator
- L1e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“saline water at 12 dS m-1 (L3)”
e3“12 rice genotypes”
e4“morphological and biochemical traits of all genotypes showed an overall reduction of about 47.41% in L3 as compared to L1 except for the tolerant check, Pokkali”
Claim · model-written summary
Plant height, leaf size and standard evaluation system (SES) score might be used as selection criteria for salt tolerant rice.
- Taxon
- riceOryza sativae5
- Outcome
- plant height, leaf size and standard evaluation system (SES) scoree5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“plant height, leaf size and standard evaluation system (SES) score might be used as a selection criterion in developing salt tolerant rice”
Claim · model-written summary
Jarom Mas, a Malaysian landrace, clustered together with the tolerant genotype Pokkali.
- Taxon
- riceOryza sativae3
- Material
- Jarom Mase6
- Outcome
- clustered together with Pokkali as tolerant genotypee6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“12 rice genotypes”
e6“a Malaysian landraces, Jarom Mas was clustered together with Pokkali as tolerant genotype”
Claim · model-written summary
The Saltol salinity-tolerance QTL was absent in Jarom Mas, indicated by SSR marker screening.
- Taxon
- riceOryza sativae3
- Material
- Jarom Mase7
- Gene
- Saltole7
- Outcome
- this QTL was absence in Jarom Mase7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“12 rice genotypes”
e7“Screening using tightly linked Simple Sequence Repeat (SSR) markers (RM1287, RM10748, RM493) of salinity tolerant QTL, Saltol indicated that this QTL was absence in Jarom Mas”
The same questions in other papers
salinity · growth · Oryza sativa (rice)Positive and negative results
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- negative
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