Abstract
The Ellis‐Roberts deterioration model depends on the assumption that the rate of seed deterioration is the same among seed lots of a crop species when stored in identical environments. The rate of deterioration of 11 corn ( Zea mays L.) seed lots from six hybrids was measured during storage in various combinations of constant temperatures (20, 30, 40, and 50°C) and seed moisture contents (100, 120, 140, and 160 g kg −1 , fresh weight basis). The seed‐survival curves were constructed by conducting successive germination tests at frequent intervals during storage. The rates of seed deterioration were estimated by probit analysis and differences among seed lots were identified by analysis of variance. The deterioration rates were significantly different among seed lots in 16 of 21 storage environments when analyzing full data sets (all data points) and in 14 of 21 storage environments when using truncated data sets (germination percentages between 5 and 95%). Both genotype and initial seed quality affected the rate of deterioration with low‐vigor seed lots generally deteriorating at a faster rate than high‐vigor seed lots. The rate of deterioration was greatly influenced by storage environment and increased with an increase in storage temperature, seed moisture, or both. The assumption of a constant rate of seed deterioration in identical storage environments was not valid for hybrid corn seed.
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Claims 7
Claim · model-written summary
Deterioration rates differed among seed lots in 16 of 21 environments using full data.
- Taxon
- corn
Zea mays subsp. mayst0 - Outcome
- deterioration ratese0
- Direction
- differente0
- Value
- 16 of 21 storage environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deterioration rates were significantly different among seed lots in 16 of 21 storage environments when analyzing full data sets (all data points)”
t0“Corn”
Claim · model-written summary
Deterioration rates differed among seed lots in 14 of 21 environments using truncated data.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- deterioration ratese0
- Direction
- differente0
- Value
- 14 of 21 storage environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The deterioration rates were significantly different among seed lots in 16 of 21 storage environments when analyzing full data sets (all data points) and in 14 of 21 storage environments when using truncated data sets (germination percentages between 5 and 95%).”
t0“Corn”
Claim · model-written summary
Genotype affected deterioration rate.
- Taxon
- CornZea mays subsp. mayst0
- Material
- genotypee0
- Outcome
- rate of deterioratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both genotype and initial seed quality affected the rate of deterioration with low‐vigor seed lots generally deteriorating at a faster rate than high‐vigor seed lots.”
t0“Corn”
Claim · model-written summary
Low-vigor seed lots deteriorated faster than high-vigor lots.
- Taxon
- CornZea mays subsp. mayst0
- Material
- low‐vigor seed lotse0
- Outcome
- rate of deterioratione0
- Direction
- fastere0
- Comparator
- high‐vigor seed lotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both genotype and initial seed quality affected the rate of deterioration with low‐vigor seed lots generally deteriorating at a faster rate than high‐vigor seed lots.”
t0“Corn”
Claim · model-written summary
Higher storage temperature increased deterioration rate.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- rate of deterioratione0
- Direction
- increasede0
- Qualifier
- storage temperaturee0
- Setting
- storage environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of deterioration was greatly influenced by storage environment and increased with an increase in storage temperature, seed moisture, or both.”
t0“Corn”
Claim · model-written summary
Higher seed moisture increased deterioration rate.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- rate of deterioratione0
- Direction
- increasede0
- Qualifier
- seed moisturee0
- Setting
- storage environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of deterioration was greatly influenced by storage environment and increased with an increase in storage temperature, seed moisture, or both.”
t0“Corn”
Claim · model-written summary
The constant deterioration-rate assumption failed for hybrid corn seed.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- assumption of a constant rate of seed deterioratione0
- Direction
- not valide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The assumption of a constant rate of seed deterioration in identical storage environments was not valid for hybrid corn seed.”