National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Current investigation was conducted to identify the best germination indices that represents seed quality status in unaged and aged onion seeds. Fresh seeds of seventeen onion varieties were preconditioned and subjected to accelerated ageing at 42 oC and 100% RH for six days. The results showed varied response of seed germination indices to ageing; germination percent (GP), time to 50 percent germination (T50), mean germination time (MGT), coefficient of velocity of germination (CVG), Timson’s index (TI), germination index (GI) and seed vigour index-I (SVI-I). GP alone was not able to explain the performance of seeds. MGT, CVG and T50overestimated the speed of germination in aged seeds compared to control. However, the positive correlation between germination index, Timson’s index and seedling vigour index-I in control, and negative correlation in aged seeds reiterated the suitability of germination index and Timson’s index for the assessment of germination performance in aged seeds. The study concluded that the germination index and Timson’s index were the best indices for the assessment of the germination performance compared to coefficient of velocity of germination, mean germination time, time to fifty percent germination and final germination percent.
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