Abstract
A study was undertaken to evaluate cause effect relationships among quantitative traits in upland rice genotypes in biennial experiment i.e. Kharif 2013 and 2014 of SG College of Agriculture and Research Station, Jagdalpur, Chhattisgarh. A total of 18 local and exotic genotypes were studied under complete rainfed treatment. Analysis of variance revealed significance in all traits indicating presence of considerable amount of genetic variation. In first experimental season (E 01), biological yield per plot had the maximum positive effect (1.0836) on grain yield followed by harvest index (0.8311) and panicle length (0.1176). Positive direct effects of these traits on grain yield indicated their importance in determining this complex character and therefore, should be kept in mind while practicing selection aimed at the improvement of grain yield. In present study (pooled over environments), biological yield has maximum direct effect on grain yield (0.9485) and indirect effect was 0.2200 mainly due to plant height (0.3018), panicles per square meter (0.3071) positively and harvest index negatively (-0.3788). Hence, biological yield should be higher in upland genotypes, which will in turn increase plant height, panicle length.
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Claims 10
Claim · model-written summary
All assessed traits showed significant variation.
- Taxon
- upland rice
Oryza sativat0 - Outcome
- all traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of variance revealed significance in all traits indicating presence of considerable amount of genetic variation”
t0“upland rice”
Claim · model-written summary
In the first season biological yield per plot had the largest positive direct effect on grain yield, 1.0836.
- Taxon
- upland riceOryza sativat0
- Outcome
- grain yielde0
- Direction
- positivee0
- Value
- 1.0836e0
- Qualifier
- biological yield per plote0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological yield per plot had the maximum positive effect (1.0836) on grain yield”
t0“upland rice”
Claim · model-written summary
In the first season harvest index had a positive direct effect of 0.8311 on grain yield.
- Taxon
- upland riceOryza sativat0
- Outcome
- harvest indexe0
- Direction
- positivee1
- Value
- 0.8311e0
- Qualifier
- panicle lengthe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“harvest index (0.8311) and panicle length (0.1176)”
e1“biological yield per plot had the maximum positive effect (1.0836) on grain yield”
t0“upland rice”
Claim · model-written summary
In the first season panicle length had a positive direct effect of 0.1176 on grain yield.
- Taxon
- upland riceOryza sativat0
- Outcome
- panicle lengthe0
- Direction
- positivee1
- Value
- 0.1176e0
- Qualifier
- harvest indexe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“harvest index (0.8311) and panicle length (0.1176)”
e1“biological yield per plot had the maximum positive effect (1.0836) on grain yield”
t0“upland rice”
Claim · model-written summary
Pooled biological yield had maximum direct effect of 0.9485 on grain yield.
- Taxon
- upland riceOryza sativat0
- Outcome
- grain yielde0
- Direction
- maximume0
- Value
- 0.9485e0
- Qualifier
- biological yielde0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological yield has maximum direct effect on grain yield (0.9485)”
t0“upland rice”
Claim · model-written summary
Pooled biological yield had an indirect effect of 0.2200 on grain yield.
- Taxon
- upland riceOryza sativat0
- Outcome
- indirect effecte0
- Direction
- positivelye0
- Value
- 0.2200e0
- Qualifier
- plant heighte0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indirect effect was 0.2200 mainly due to plant height (0.3018), panicles per square meter (0.3071) positively and harvest index negatively (-0.3788)”
t0“upland rice”
Claim · model-written summary
Plant height contributed positively, 0.3018, to the indirect effect.
- Taxon
- upland riceOryza sativat0
- Outcome
- plant heighte0
- Direction
- positivelye0
- Value
- 0.3018e0
- Qualifier
- panicles per square metere0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height (0.3018), panicles per square meter (0.3071) positively”
t0“upland rice”
Claim · model-written summary
Panicles per square meter contributed positively, 0.3071, to the indirect effect.
- Taxon
- upland riceOryza sativat0
- Outcome
- panicles per square metere0
- Direction
- positivelye0
- Value
- 0.3071e0
- Qualifier
- plant heighte0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant height (0.3018), panicles per square meter (0.3071) positively”
t0“upland rice”
Claim · model-written summary
Harvest index contributed negatively, -0.3788, to the indirect effect.
- Taxon
- upland riceOryza sativat0
- Outcome
- harvest indexe0
- Direction
- negativelye0
- Value
- -0.3788e0
- Qualifier
- harvest indexe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“harvest index negatively (-0.3788)”
t0“upland rice”
Claim · model-written summary
Authors recommend selecting for higher biological yield.
- Taxon
- upland riceOryza sativat0
- Outcome
- biological yield should be highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological yield should be higher in upland genotypes”
t0“upland rice”