Abstract
Improvement of tomato (Lycopersicon esculentum L.) for growth in saline soils is a major goal of tomato breeders. The aim of this study was to identify the genetic combining ability and genetics of salinity tolerance in tomato. Plant materials were grown under normal (NG) and salinity stress (SSG) conditions. Results showed that the genetic controlling mechanism of salinity-related traits and fruit weight is complex and that all genetic components of additive, non-additive and maternal are involved. The nature of gene action for fruit weight and salinity-related traits was significantly affected by salinity stress. Dominance and additive gene action were predominant under NG and SSG, respectively. Under NG, the best general combiner parent for fruit weight was P3 (salt-tolerant with moderate fruit yield). Under SSG, P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight and exhibited high genetic combining ability for K+/Na+, lipoxygenase activity, proline, relative water content, total carbohydrate and cell membrane stability. With the high frequency of genes effective in salt tolerance, the P1 parent appeared as the best specific mating partner with other parents under SSG. Simultaneous selection for fruit weight and surrogate traits (cell membrane stability, proline and relative water content) in a population derived from the P1 × P5 (susceptible with high fruit yield) cross could result in a salt-tolerant tomato genotype.
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Claims 10
Claim · model-written summary
Additive, nonadditive and maternal components contribute to salinity traits and fruit weight.
- Taxon
- tomato
Solanum lycopersicumt0 - Outcome
- additive, non-additive and maternale0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all genetic components of additive, non-additive and maternal are involved”
t0“tomato”
Claim · model-written summary
Salinity stress significantly affected gene action for fruit weight and salinity traits.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- salinity stresse0
- Outcome
- nature of gene action for fruit weight and salinity-related traitse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nature of gene action for fruit weight and salinity-related traits was significantly affected by salinity stress”
t0“tomato”
Claim · model-written summary
Dominance gene action predominated under normal growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Dominancee0
- Setting
- NGe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dominance and additive gene action were predominant under NG and SSG, respectively”
t0“tomato”
Claim · model-written summary
Additive gene action predominated under salinity stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- additive gene actione0
- Setting
- SSGe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dominance and additive gene action were predominant under NG and SSG, respectively”
t0“tomato”
Claim · model-written summary
P3 was the best general combining parent for fruit weight under normal growth.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- P3e0
- Outcome
- general combiner parent for fruit weighte0
- Direction
- beste0
- Setting
- NGe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under NG, the best general combiner parent for fruit weight was P3”
t0“tomato”
Claim · model-written summary
P1 was the best general combining parent for fruit weight under salinity stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- P1e0
- Outcome
- general combiner parent for fruit weighte0
- Direction
- beste0
- Setting
- SSGe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under SSG, P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight”
t0“tomato”
Claim · model-written summary
P1 had high combining ability for K+/Na+, lipoxygenase activity and proline.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- P1e0
- Outcome
- genetic combining ability for K+/Na+, lipoxygenase activity, prolinee0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight and exhibited high genetic combining ability for K+/Na+, lipoxygenase activity, proline, relative water content, total carbohydrate and cell membrane stability”
t0“tomato”
Claim · model-written summary
P1 had high combining ability for relative water content, total carbohydrate and membrane stability.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- P1e0
- Outcome
- relative water content, total carbohydrate and cell membrane stabilitye0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P1 (highly salt-tolerant with low fruit yield) was the best general combiner parent for fruit weight and exhibited high genetic combining ability for K+/Na+, lipoxygenase activity, proline, relative water content, total carbohydrate and cell membrane stability”
t0“tomato”
Claim · model-written summary
P1 appeared the best specific mating partner under salinity stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- P1e0
- Outcome
- best specific mating partnere0
- Direction
- beste0
- Setting
- SSGe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the P1 parent appeared as the best specific mating partner with other parents under SSG”
t0“tomato”
Claim · model-written summary
Selecting fruit weight and surrogate traits in the P1 by P5 cross may produce salt tolerant tomato.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- P1 × P5e0
- Outcome
- salt-tolerant tomato genotypee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simultaneous selection for fruit weight and surrogate traits (cell membrane stability, proline and relative water content) in a population derived from the P1 × P5 (susceptible with high fruit yield) cross could result in a salt-tolerant tomato genotype”