Abstract
Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2, were monitored during late maturation and seeds of Oba Supa 1 were harvested at five times between 43 and 19% seed moisture. Physiological seed quality was evaluated in laboratory tests and field trials at three planting dates. Using differences in field performance at the different dates, index of seed ageing was computed. Except for ear diameter, differences in field emergence characteristics, post-emergence growth and performance of all stages were negligible (P > 0.05). Despite negligible differences in cob diameter, ear diameter of plants from seeds of the first two maturity stages were significantly (P < 0.05) smaller than that of other stages. Maturity of seed planted affected kernel size and consequently, grain yield, of the resultant crop. Irrespective of maturity stage, however, seedling growth traits, interval between flowering stages, morphological traits, number of harvestable ears and grain yield were the traits most affected by seed ageing. Many deteriorative changes that have been reported as occurring in seeds soon after harvest are not immediately translated into large measurable effects on all traits of subsequent maize crop. Laboratory test results correlated well with field performance and they were recommended as good indicators of seed quality for planting purposes in tropical locations with similar conditions as that of this study.
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Claims 8
Claim · model-written summary
Differences in field emergence characteristics among seed maturity stages were negligible.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e1“Except for ear diameter, differences in field emergence characteristics, post-emergence growth and performance of all stages were negligible (P > 0.05)”
Claim · model-written summary
Ear diameter of plants from seeds of the first two maturity stages was significantly smaller than that of other stages.
- Treatment
- seeds of the first two maturity stagese2
- Outcome
- ear diametere2
- Direction
- smallere2
- Qualifier
- P < 0.05e2
- Comparator
- other stagese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e2“ear diameter of plants from seeds of the first two maturity stages were significantly (P < 0.05) smaller than that of other stages”
Claim · model-written summary
Maturity of seed planted affected kernel size.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e3“Maturity of seed planted affected kernel size and consequently, grain yield, of the resultant crop”
Claim · model-written summary
Maturity of seed planted affected grain yield of the resultant crop.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e3“Maturity of seed planted affected kernel size and consequently, grain yield, of the resultant crop”
Claim · model-written summary
Seedling growth traits, interval between flowering stages and morphological traits were among the traits most affected by seed ageing.
- Treatment
- seed ageinge4
- Outcome
- seedling growth traits, interval between flowering stages, morphological traitse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e4“Irrespective of maturity stage, however, seedling growth traits, interval between flowering stages, morphological traits, number of harvestable ears and grain yield were the traits most affected by seed ageing”
Claim · model-written summary
Number of harvestable ears and grain yield were among the traits most affected by seed ageing.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e4“Irrespective of maturity stage, however, seedling growth traits, interval between flowering stages, morphological traits, number of harvestable ears and grain yield were the traits most affected by seed ageing”
Claim · model-written summary
Laboratory test results correlated well with field performance of maize.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e5“Laboratory test results correlated well with field performance and they were recommended as good indicators of seed quality for planting purposes in tropical locations with similar conditions as that of this study”
Claim · model-written summary
Laboratory tests are recommended as good indicators of seed quality for planting purposes in tropical locations.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in seed dry weight of two tropical maize hybrids, Oba Supa 1 and 2”
e5“Laboratory test results correlated well with field performance and they were recommended as good indicators of seed quality for planting purposes in tropical locations with similar conditions as that of this study”
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stage · yield · Zea mays (maize)Positive and negative results
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