Abstract
The genetic relationships between grain types and agronomic traits in rice (Oryza sativa L.) were studied in 6 x 6 diallel cross (excluding reciprocals) involving long-, medium-, and short-grain cultivars were studied. Combining ability analyses revealed that mean squares due to GCA were larger than those due to SCA, except for heading date. Vsca for heading date, plant height, panicle number, and grains per panicle were larger than Vgca for those traits. Panicle length, grain length, grain width, and 100-grain weight had larger Vgca than Vsca. General combining ability effects obtained in this study suggested that ‘Brazos’ was a good combiner for earliness. ‘Starbonnet’ was a good combiner for plant height, grains per panicle, and ‘Starbonnet’ and ‘Lebonnet’ were good combiners for grain length. ‘Nortai’ combined well for high panicle number and ‘Nortai’ and ‘S201’ combined well for grain width. ‘M401’ and ‘S201’ were good combiners for 100-grain weight. Phenotypic and genetic correlations followed a similar trend, except the latter was of a higher magnitude. Grain width and 100-grain weight were positively correlated with each other, but negatively correlated with the other traits. Grain length and grain width were negatively correlated. In general, heritability estimates in the broad sense were high. Moderate narrow sense heritability estimates for plant height, panicle length, grain length, grain width, and 100-grain weight suggested that these traits can be selected with the pedigree method, and the bulk method would be better for selecting heading date and grains per panicle.
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Claims 20
Claim · model-written summary
General combining ability mean squares exceeded specific combining ability mean squares except for heading date.
- Taxon
- rice
Oryza sativat0 - Outcome
- mean squares due to GCAe0
- Direction
- largere0
- Comparator
- SCAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mean squares due to GCA were larger than those due to SCA, except for heading date”
t0“Rice”
Claim · model-written summary
Specific combining ability variance exceeded general combining ability variance for heading date, plant height, panicle number, and grains per panicle.
- Taxon
- riceOryza sativat0
- Outcome
- Vsca for heading date, plant height, panicle number, and grains per paniclee0
- Direction
- largere0
- Comparator
- Vgcae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vsca for heading date, plant height, panicle number, and grains per panicle were larger than Vgca for those traits”
t0“Rice”
Claim · model-written summary
General combining ability variance exceeded specific combining ability variance for panicle length, grain length, grain width, and 100-grain weight.
- Taxon
- riceOryza sativat0
- Outcome
- Vgcae0
- Direction
- largere0
- Comparator
- Vscae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Panicle length, grain length, grain width, and 100-grain weight had larger Vgca than Vsca”
t0“Rice”
Claim · model-written summary
Brazos was a good combiner for earliness.
- Taxon
- riceOryza sativat0
- Material
- ‘Brazos’e0
- Outcome
- good combiner for earlinesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Brazos’ was a good combiner for earliness”
t0“Rice”
Claim · model-written summary
Starbonnet was a good combiner for plant height and grains per panicle.
- Taxon
- riceOryza sativat0
- Material
- ‘Starbonnet’e0
- Outcome
- good combiner for plant height, grains per paniclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Starbonnet’ was a good combiner for plant height, grains per panicle”
t0“Rice”
Claim · model-written summary
Starbonnet was a good combiner for grain length.
- Taxon
- riceOryza sativat0
- Material
- ‘Starbonnet’e0
- Outcome
- good combiners for grain lengthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Starbonnet’ and ‘Lebonnet’ were good combiners for grain length”
t0“Rice”
Claim · model-written summary
Lebonnet was a good combiner for grain length.
- Taxon
- riceOryza sativat0
- Material
- ‘Lebonnet’e0
- Outcome
- good combiners for grain lengthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Starbonnet’ and ‘Lebonnet’ were good combiners for grain length”
t0“Rice”
Claim · model-written summary
Nortai combined well for high panicle number.
- Taxon
- riceOryza sativat0
- Material
- ‘Nortai’e0
- Outcome
- high panicle numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Nortai’ combined well for high panicle number”
t0“Rice”
Claim · model-written summary
Nortai combined well for grain width.
- Taxon
- riceOryza sativat0
- Material
- ‘Nortai’e0
- Outcome
- grain widthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Nortai’ and ‘S201’ combined well for grain width”
t0“Rice”
Claim · model-written summary
S201 combined well for grain width.
- Taxon
- riceOryza sativat0
- Material
- ‘S201’e0
- Outcome
- grain widthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Nortai’ and ‘S201’ combined well for grain width”
t0“Rice”
Claim · model-written summary
M401 was a good combiner for 100-grain weight.
- Taxon
- riceOryza sativat0
- Material
- ‘M401’e0
- Outcome
- 100-grain weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘M401’ and ‘S201’ were good combiners for 100-grain weight”
t0“Rice”
Claim · model-written summary
S201 was a good combiner for 100-grain weight.
- Taxon
- riceOryza sativat0
- Material
- ‘S201’e0
- Outcome
- 100-grain weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘M401’ and ‘S201’ were good combiners for 100-grain weight”
t0“Rice”
Claim · model-written summary
Phenotypic and genetic correlations had similar trends, but genetic correlations were larger.
- Taxon
- riceOryza sativat0
- Outcome
- genetic correlationse0
- Direction
- higher magnitudee0
- Comparator
- Phenotypice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phenotypic and genetic correlations followed a similar trend, except the latter was of a higher magnitude”
t0“Rice”
Claim · model-written summary
Grain width and 100-grain weight were positively correlated.
- Taxon
- riceOryza sativat0
- Organ / stage
- Grain widthe0
- Outcome
- 100-grain weighte0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain width and 100-grain weight were positively correlated with each other”
t0“Rice”
Claim · model-written summary
Grain width and 100-grain weight were negatively correlated with other traits.
- Taxon
- riceOryza sativat0
- Organ / stage
- Grain widthe0
- Outcome
- other traitse0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain width and 100-grain weight were positively correlated with each other, but negatively correlated with the other traits”
t0“Rice”
Claim · model-written summary
Grain length and grain width were negatively correlated.
- Taxon
- riceOryza sativat0
- Organ / stage
- Grain lengthe0
- Outcome
- grain widthe0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain length and grain width were negatively correlated”
t0“Rice”
Claim · model-written summary
Broad sense heritability estimates were generally high.
- Taxon
- riceOryza sativat0
- Outcome
- heritability estimates in the broad sensee0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, heritability estimates in the broad sense were high”
t0“Rice”
Claim · model-written summary
Narrow sense heritability was moderate for plant height, panicle length, grain length, grain width, and 100-grain weight.
- Taxon
- riceOryza sativat0
- Outcome
- narrow sense heritability estimatese0
- Direction
- Moderatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate narrow sense heritability estimates for plant height, panicle length, grain length, grain width, and 100-grain weight”
t0“Rice”
Claim · model-written summary
The authors suggest pedigree selection for plant height, panicle length, grain length, grain width, and 100-grain weight.
- Taxon
- riceOryza sativat0
- Outcome
- selected with the pedigree methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these traits can be selected with the pedigree method”
t0“Rice”
Claim · model-written summary
The authors suggest bulk selection for heading date and grains per panicle.
- Taxon
- riceOryza sativat0
- Outcome
- the bulk method would be better for selecting heading date and grains per paniclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the bulk method would be better for selecting heading date and grains per panicle”
t0“Rice”