Abstract
Rice (Oryza sativa L.) production is increasingly threatened by abiotic stresses, notably salinity and phosphorus (P) deficiency which constrain crop performance in vulnerable agro-ecosystems. The current study was designed to assess the combining ability of four Saltol 1 introgressed backcross inbred lines and two Pup1 introgressed testers through a Line × Tester mating design with the objective of identifying the nature of gene action of yield traits and superior parental genotypes and cross combinations for the genetic enhancement under stress-prone conditions. Eight F₁ hybrids along with six parental lines were assessed using a randomized complete block design with two replications during Rabi 2023-24. Analysis of variance revealed considerable genetic variability across all the traits studied. Combining ability analysis demonstrated that BIL 33, D5-1-3-2-1 and C16-1-2-8 were superior general combiners, particularly for grain yield and associated component traits while cross combinations such as BIL 33 × C16-1-2-8 and BIL 1102 × D5-1-3-2-1 exhibited significant specific combining ability effects reflecting the yield potential of hybrids. Variance component analysis further indicated that traits such as days to 50% flowering, plant height and grain yield were chiefly administered by additive gene action whereas traits viz., flag leaf length, spikelet fertility and grain number were influenced by non-additive action. These findings provide valuable insights into the genetic construction of key agronomic traits and offer a strong basis for breeding stress-resilient, high-yielding rice hybrids.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
BIL 33 was a superior general combiner, particularly for grain yield and associated component traits.
- Taxon
- rice
Oryza sativat0 - Material
- BIL 33e1
- Outcome
- general combinerse1
- Direction
- superiore1
- Qualifier
- particularly for grain yield and associated component traitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Combining ability analysis demonstrated that BIL 33, D5-1-3-2-1 and C16-1-2-8 were superior general combiners, particularly for grain yield and associated component traits”
t0“rice”
Claim · model-written summary
D5-1-3-2-1 was a superior general combiner, particularly for grain yield and associated component traits.
- Taxon
- riceOryza sativat0
- Material
- D5-1-3-2-1e1
- Outcome
- general combinerse1
- Direction
- superiore1
- Qualifier
- particularly for grain yield and associated component traitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Combining ability analysis demonstrated that BIL 33, D5-1-3-2-1 and C16-1-2-8 were superior general combiners, particularly for grain yield and associated component traits”
t0“rice”
Claim · model-written summary
C16-1-2-8 was a superior general combiner, particularly for grain yield and associated component traits.
- Taxon
- riceOryza sativat0
- Material
- C16-1-2-8e1
- Outcome
- general combinerse1
- Direction
- superiore1
- Qualifier
- particularly for grain yield and associated component traitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Combining ability analysis demonstrated that BIL 33, D5-1-3-2-1 and C16-1-2-8 were superior general combiners, particularly for grain yield and associated component traits”
t0“rice”
Claim · model-written summary
The cross BIL 33 x C16-1-2-8 showed significant specific combining ability effects reflecting the yield potential of hybrids.
- Taxon
- riceOryza sativat0
- Material
- BIL 33 × C16-1-2-8e2
- Outcome
- specific combining ability effectse2
- Qualifier
- reflecting the yield potential of hybridse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“cross combinations such as BIL 33 × C16-1-2-8 and BIL 1102 × D5-1-3-2-1 exhibited significant specific combining ability effects reflecting the yield potential of hybrids”
t0“rice”
Claim · model-written summary
The cross BIL 1102 x D5-1-3-2-1 showed significant specific combining ability effects reflecting the yield potential of hybrids.
- Taxon
- riceOryza sativat0
- Material
- BIL 1102 × D5-1-3-2-1e2
- Outcome
- specific combining ability effectse2
- Qualifier
- reflecting the yield potential of hybridse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“cross combinations such as BIL 33 × C16-1-2-8 and BIL 1102 × D5-1-3-2-1 exhibited significant specific combining ability effects reflecting the yield potential of hybrids”
t0“rice”
Claim · model-written summary
Days to 50% flowering, plant height and grain yield were chiefly governed by additive gene action in rice.
- Taxon
- riceOryza sativat0
- Outcome
- days to 50% flowering, plant height and grain yielde3
- Qualifier
- chiefly administered by additive gene actione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“traits such as days to 50% flowering, plant height and grain yield were chiefly administered by additive gene action”
t0“rice”
Claim · model-written summary
Flag leaf length, spikelet fertility and grain number were influenced by non-additive gene action in rice.
- Taxon
- riceOryza sativat0
- Outcome
- flag leaf length, spikelet fertility and grain numbere4
- Qualifier
- influenced by non-additive actione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“traits viz., flag leaf length, spikelet fertility and grain number were influenced by non-additive action”
t0“rice”
Claim · model-written summary
Analysis of variance revealed considerable genetic variability across all the traits studied in rice.
- Taxon
- riceOryza sativat0
- Outcome
- genetic variabilitye5
- Qualifier
- across all the traits studiede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Analysis of variance revealed considerable genetic variability across all the traits studied”
t0“rice”