Abstract
Anther culture response of ten rice parental genotypes and their 24 F1 crosses was studied to estimate combining ability effects for callus induction and plant regeneration under drought stress conditions. The analysis of variance showed that drought stress levels mean squares were found to be highly significant for all in vitro studied traits. The percentage of anthers that developed calli ranged from 12.92% for the IRRI 148 to 45.00% for the cross L1 × T3 among the genotypes across the four different stress levels of PEG. The control (PEG-free medium) gave the highest mean value of callus induction (41.33%). On the other hand, the medium containing 30 g/l of PEG gave the lowest one (14.28%) across all genotypes. Results showed that the three crosses (L1 × T2, L1 × T3 and L3 × T1) gave the highest mean values of plant regeneration (9.50%, 8.00 and 7.92% respectively). The percentage of plant regeneration from the control medium was 7.12%, while the medium containing 30 g/l of PEG gave the lowest one across all genotypes (3.76%). The ratio of GCA/SCA was found less than unity for all in vitro studied traits under the four stress levels, revealing the predominant role of dominance gene action in the inheritance of these traits. Results showed that the IRGC (T3) followed by Giza 177 (L1) were the best combiners for callus induction under varying concentrations of PEG due to their highly significant positive GCA values. For plant regeneration, one parental genotype Giza 177 (L1) was the best combiner for plant regeneration under varying concentrations of PEG due to their highly significant positive GCA values. The two crosses; L3 × T1 and L1 × T2 recorded the highest SCA effects for plant regeneration and green plant regeneration under the four stress levels.
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Claims 16
Claim · model-written summary
Drought stress levels varied significantly for all studied in vitro traits.
- Taxon
- rice
Oryza sativat0 - Treatment
- drought stress levelse0
- Outcome
- all in vitro studied traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress levels mean squares were found to be highly significant for all in vitro studied traits”
t0“rice”
Claim · model-written summary
IRRI 148 had 12.92% anthers forming calli, the low end across genotypes.
- Taxon
- riceOryza sativat0
- Material
- IRRI 148e0
- Outcome
- percentage of anthers that developed callie0
- Value
- 12.92%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of anthers that developed calli ranged from 12.92% for the IRRI 148 to 45.00% for the cross L1 × T3”
t0“rice”
Claim · model-written summary
L1 × T3 had 45.00% anthers forming calli, the high end across genotypes.
- Taxon
- riceOryza sativat0
- Material
- L1 × T3e0
- Outcome
- percentage of anthers that developed callie0
- Value
- 45.00%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of anthers that developed calli ranged from 12.92% for the IRRI 148 to 45.00% for the cross L1 × T3”
t0“rice”
Claim · model-written summary
PEG-free control medium had the highest mean callus induction at 41.33%.
- Taxon
- riceOryza sativat0
- Treatment
- PEG-free mediume0
- Outcome
- callus inductione0
- Direction
- higheste0
- Value
- 41.33%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The control (PEG-free medium) gave the highest mean value of callus induction (41.33%)”
t0“rice”
Claim · model-written summary
30 g/l PEG medium gave the lowest callus induction at 14.28%.
- Taxon
- riceOryza sativat0
- Treatment
- 30 g/l of PEGe0
- Outcome
- callus inductione1
- Direction
- loweste0
- Value
- 14.28%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the medium containing 30 g/l of PEG gave the lowest one (14.28%) across all genotypes”
t0“rice”
e1“mean value of callus induction”
Claim · model-written summary
L1 × T2 had 9.50% mean plant regeneration.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the three crosses (L1 × T2, L1 × T3 and L3 × T1) gave the highest mean values of plant regeneration (9.50%, 8.00 and 7.92% respectively)”
t0“rice”
Claim · model-written summary
L1 × T3 had 8.00 mean plant regeneration.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the three crosses (L1 × T2, L1 × T3 and L3 × T1) gave the highest mean values of plant regeneration (9.50%, 8.00 and 7.92% respectively)”
t0“rice”
Claim · model-written summary
L3 × T1 had 7.92% mean plant regeneration.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the three crosses (L1 × T2, L1 × T3 and L3 × T1) gave the highest mean values of plant regeneration (9.50%, 8.00 and 7.92% respectively)”
t0“rice”
Claim · model-written summary
Control medium yielded 7.12% plant regeneration.
- Taxon
- riceOryza sativat0
- Treatment
- control mediume0
- Outcome
- plant regeneratione0
- Value
- 7.12%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of plant regeneration from the control medium was 7.12%”
t0“rice”
Claim · model-written summary
30 g/l PEG medium gave the lowest regeneration at 3.76%.
- Taxon
- riceOryza sativat0
- Treatment
- 30 g/l of PEGe0
- Outcome
- plant regeneratione1
- Direction
- loweste0
- Value
- 3.76%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the medium containing 30 g/l of PEG gave the lowest one across all genotypes (3.76%)”
t0“rice”
e1“percentage of plant regeneration from the control medium”
Claim · model-written summary
GCA/SCA below one indicated predominant dominance gene action for all studied traits.
- Taxon
- riceOryza sativat0
- Gene
- GCA/SCAe0
- Outcome
- predominant role of dominance gene actione0
- Direction
- less than unitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of GCA/SCA was found less than unity for all in vitro studied traits under the four stress levels, revealing the predominant role of dominance gene action in the inheritance of these traits”
t0“rice”
Claim · model-written summary
IRGC (T3) was the best combiner for callus induction under PEG.
- Taxon
- riceOryza sativat0
- Material
- IRGC (T3)e0
- Outcome
- best combiners for callus inductione0
- Direction
- beste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the IRGC (T3) followed by Giza 177 (L1) were the best combiners for callus induction under varying concentrations of PEG due to their highly significant positive GCA values”
t0“rice”
Claim · model-written summary
Giza 177 (L1) was next best for callus induction under PEG.
- Taxon
- riceOryza sativat0
- Material
- Giza 177 (L1)e0
- Outcome
- best combiners for callus inductione0
- Direction
- beste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the IRGC (T3) followed by Giza 177 (L1) were the best combiners for callus induction under varying concentrations of PEG due to their highly significant positive GCA values”
t0“rice”
Claim · model-written summary
Giza 177 (L1) was the best plant-regeneration combiner under PEG.
- Taxon
- riceOryza sativat0
- Material
- Giza 177 (L1)e0
- Outcome
- plant regeneratione0
- Direction
- beste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Giza 177 (L1) was the best combiner for plant regeneration under varying concentrations of PEG due to their highly significant positive GCA values”
t0“rice”
Claim · model-written summary
L3 × T1 showed one of the highest SCA effects for plant and green plant regeneration.
- Taxon
- riceOryza sativat0
- Material
- L3 × T1e0
- Outcome
- SCA effects for plant regeneration and green plant regeneratione0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L3 × T1 and L1 × T2 recorded the highest SCA effects for plant regeneration and green plant regeneration under the four stress levels”
t0“rice”
Claim · model-written summary
L1 × T2 showed one of the highest SCA effects for plant and green plant regeneration.
- Taxon
- riceOryza sativat0
- Material
- L1 × T2e0
- Outcome
- SCA effects for plant regeneration and green plant regeneratione0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L3 × T1 and L1 × T2 recorded the highest SCA effects for plant regeneration and green plant regeneration under the four stress levels”
t0“rice”
The same questions in other papers
drought · growth · Oryza sativa (rice)Positive and negative results
183 papers in the same direction as this paper · 98 in the opposite direction
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