Abstract
Yield trials of advanced lines of pearl millet were grown under midseason (panicle initiation to flowering) and terminal (flowering to maturity) drought stresses in the dry seasons of 1981, 1982, and 1983. Grain yield and its components were severely reduced by the terminal stress, but were little affected by the midseason drought, as there was compensation by later tillers for yield lost on the earlier shoots. The major factor determining grain yield of a genotype in both stress treatments was its time to flowering. Because of this, yield-yield component relationships under stress were a result of yield component-phenology relationships. Yield potential (measured in an irrigated treatment in the same field) was generally positively related to yield under stress, but accounted for a much smaller fraction of yield variation than time to flowering. These two factors together accounted for more than 50% of the total variation in grain yield under stress, suggesting that genotype drought response (drought resistance/susceptibility) was a secondary rather than a primary factor in differences in yield under stress among the genotypes tested.
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Claims 7
Claim · model-written summary
Terminal drought severely reduced grain yield and its components in pearl millet.
- Taxon
- pearl millet
Cenchrus americanust0 - Treatment
- terminal stresse0
- Outcome
- Grain yield and its componentse0
- Direction
- severely reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield and its components were severely reduced by the terminal stress”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
Claim · model-written summary
Midseason drought had little effect on grain yield and components because later tillers compensated for losses on earlier shoots.
- Taxon
- pearl milletCenchrus americanust0
- Treatment
- midseason droughte0
- Outcome
- yielde0
- Direction
- little affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but were little affected by the midseason drought, as there was compensation by later tillers for yield lost on the earlier shoots”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
Claim · model-written summary
Time to flowering was the major determinant of grain yield under both drought treatments.
- Taxon
- pearl milletCenchrus americanust0
- Organ / stage
- time to floweringe0
- Outcome
- grain yielde0
- Qualifier
- both stress treatmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The major factor determining grain yield of a genotype in both stress treatments was its time to flowering”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
Claim · model-written summary
Yield and yield component relationships under stress reflected relationships between components and phenology.
- Taxon
- pearl milletCenchrus americanust0
- Organ / stage
- phenologye0
- Outcome
- yield-yield component relationshipse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield-yield component relationships under stress were a result of yield component-phenology relationships”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
Claim · model-written summary
Irrigated yield potential was generally positively related to yield under stress, but explained less variation than flowering time.
- Taxon
- pearl milletCenchrus americanust0
- Outcome
- yield under stresse0
- Direction
- positively relatede0
- Comparator
- time to floweringe0
- Setting
- same fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield potential (measured in an irrigated treatment in the same field) was generally positively related to yield under stress, but accounted for a much smaller fraction of yield variation than time to flowering”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
Claim · model-written summary
Yield potential and flowering time together accounted for over half of the variation in grain yield under stress.
- Taxon
- pearl milletCenchrus americanust0
- Treatment
- stresse0
- Outcome
- variation in grain yield under stresse0
- Value
- more than 50%e0
- Qualifier
- These two factorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These two factors together accounted for more than 50% of the total variation in grain yield under stress”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
Claim · model-written summary
Genotype drought response was interpreted as secondary to flowering time and yield potential in explaining stressed yield differences.
- Taxon
- pearl milletCenchrus americanust0
- Material
- genotypes testede0
- Outcome
- differences in yield under stresse0
- Qualifier
- secondary rather than a primary factore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that genotype drought response (drought resistance/susceptibility) was a secondary rather than a primary factor in differences in yield under stress among the genotypes tested”
t0“Assessment of drought resistance in pearl millet [ Pennisetum americanum (L.) Leeke]. I. Factors affecting yields under stress”
The same questions in other papers
drought · yield · Cenchrus americanus (pearl millet)Positive and negative results
16 papers in the same direction as this paper · 7 in the opposite direction
- positive
- negative
- negative
20 papers more in this group
See all 24 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.