Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF)
Onion seeds are prone to rapid germination and viability losses under unfavourable storage conditions. The final germination percentage is considered the most important parameter for determining the performance of seed lots after storage, although other quantitative traits, such as the time and spee...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Seeds |
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| Online Access: | https://www.mdpi.com/2674-1024/2/2/15 |
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| author | Sunil Kumar Sudipta Basu J. Aravind Anjali Anand |
| author_facet | Sunil Kumar Sudipta Basu J. Aravind Anjali Anand |
| author_sort | Sunil Kumar |
| collection | DOAJ |
| description | Onion seeds are prone to rapid germination and viability losses under unfavourable storage conditions. The final germination percentage is considered the most important parameter for determining the performance of seed lots after storage, although other quantitative traits, such as the time and speed of germination, help in more realistic predictions of seed germination. A study was conducted on seventeen seed lots of onion seeds to delineate the most comprehensive parameter indicating seed performance after storage using the four-parameter Hill function (4-PHF) mathematical model. Seeds of seventeen onion cultivars were subjected to accelerated ageing at 42 °C and 100% RH for 48, 96 and 144 h, followed by seed germination evaluation. The germination performance was evaluated by 4-PHF based on time-related parameters, such as the time to maximum germination rate (<i>TMGR</i>), time to 50% germination (<i>T</i><sub>50</sub>), and uniformity (<i>U</i>), along with the germination percentage (<i>a</i>), shape and steepness of the Four-Parameter Hill Function (FPHF) curve (<i>b</i>), which were important determinants of the area under curve (<i>AUC</i>), and RoG (rate of germination) curves. Among the parameters, the <i>AUC</i> was found to provide the most comprehensive evaluation of the storage performance of the onion varieties and was decisive in the classification of the varieties as ‘good’ or ‘poor’ storers. A positive correlation between seed vigour index-I (<i>SVI-I)</i> and the <i>AUC</i> reiterated the suitability of using 4-PHF parameters for the assessment of the storage potential of onion varieties. |
| first_indexed | 2024-03-11T01:57:58Z |
| format | Article |
| id | doaj.art-61504827b0e94e589c5a4182a8a21f6c |
| institution | Directory Open Access Journal |
| issn | 2674-1024 |
| language | English |
| last_indexed | 2024-03-11T01:57:58Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Seeds |
| spelling | doaj.art-61504827b0e94e589c5a4182a8a21f6c2023-11-18T12:29:51ZengMDPI AGSeeds2674-10242023-04-012219520710.3390/seeds2020015Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF)Sunil Kumar0Sudipta Basu1J. Aravind2Anjali Anand3Division of Seed Science and Technology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, IndiaDivision of Seed Science and Technology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, IndiaICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, IndiaDivision of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, IndiaOnion seeds are prone to rapid germination and viability losses under unfavourable storage conditions. The final germination percentage is considered the most important parameter for determining the performance of seed lots after storage, although other quantitative traits, such as the time and speed of germination, help in more realistic predictions of seed germination. A study was conducted on seventeen seed lots of onion seeds to delineate the most comprehensive parameter indicating seed performance after storage using the four-parameter Hill function (4-PHF) mathematical model. Seeds of seventeen onion cultivars were subjected to accelerated ageing at 42 °C and 100% RH for 48, 96 and 144 h, followed by seed germination evaluation. The germination performance was evaluated by 4-PHF based on time-related parameters, such as the time to maximum germination rate (<i>TMGR</i>), time to 50% germination (<i>T</i><sub>50</sub>), and uniformity (<i>U</i>), along with the germination percentage (<i>a</i>), shape and steepness of the Four-Parameter Hill Function (FPHF) curve (<i>b</i>), which were important determinants of the area under curve (<i>AUC</i>), and RoG (rate of germination) curves. Among the parameters, the <i>AUC</i> was found to provide the most comprehensive evaluation of the storage performance of the onion varieties and was decisive in the classification of the varieties as ‘good’ or ‘poor’ storers. A positive correlation between seed vigour index-I (<i>SVI-I)</i> and the <i>AUC</i> reiterated the suitability of using 4-PHF parameters for the assessment of the storage potential of onion varieties.https://www.mdpi.com/2674-1024/2/2/15oniongermination performancestorabilityvigourfour-parameter hill function |
| spellingShingle | Sunil Kumar Sudipta Basu J. Aravind Anjali Anand Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF) Seeds onion germination performance storability vigour four-parameter hill function |
| title | Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF) |
| title_full | Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF) |
| title_fullStr | Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF) |
| title_full_unstemmed | Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF) |
| title_short | Assessment of Storage Potential of Onion Varieties Using Variables Extracted from a Mathematical Model 4-Parameter Hill Function (4-PHF) |
| title_sort | assessment of storage potential of onion varieties using variables extracted from a mathematical model 4 parameter hill function 4 phf |
| topic | onion germination performance storability vigour four-parameter hill function |
| url | https://www.mdpi.com/2674-1024/2/2/15 |
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