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Subject: Vegetable Science × Author: B. R, Chandana × End date: 2023 × Start date: 2020 ×
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    ThesisItemOpen Access
    Quality analysis of naturally and artificially aged seeds of Kasuri Methi (Trigonella corniculata L.)
    (CCSHAU, Hisar, 2021-08) B. R, Chandana; Tehlan, S K
    Seed is the basic input of any cultivation system and its quality significantly contributes for better yielding of the crop. The present investigation was carried out during 2019-20 on seven genotypes of Kasuri methi (Trigonella corniculata L.) viz., KM 139-1, HM 538, HM 557, GC 208, GC 209, Kasuri Selection and KM Hosiyarpur. Four seed lots were used under natural ageing viz. freshly harvested seed lot, one year, two year and three years ambient stored seeds. For artificial ageing, freshly harvested seed lot was accelerated aged at 40±10C temperature and 100% relative humidity for 48, 72 and 96 hours. All the fenugreek genotypes were taken to evaluate the seed viability/vigour parameters, to determine the inter-relationship among various seed quality parameters and to determine correlation among natural and artificial ageing. All the seed lots were subjected to vigour and viability test with three replications and observation were recorded on standard germination, seedling length, seedling fresh weight, seedling dry weight, vigour index I &II, electrical conductivity, dehydrogenase activity, catalase activity, peroxidase activity, tetrazolium test, pH of seed leachates and field emergence. The results of the study indicates that, all the seed quality parameters reduced with increase in ageing period in both natural and artificial ageing except for electrical conductivity which increased with advancement in ageing period. Decrease in values of all the seed quality parameters and increase in electrical conductivity values with advancement of ageing represent decrease in vigour and viability of seed lots. A reduction of 21.8% in germination was observed after three years of natural ageing. Genotype K Selection and HM 557 were found to be more vigorous and genotype K M Hosiyarpur was found to be least vigorous and evaluated to be a poor storer. The standard germination, seed vigour index I & II, tetrazolium test, pH of seed leachates, and enzyme activity (Dehydrogenase, catalase and peroxidase activity) emerged as reliable predictors of seed quality and field emergence. Correlation studies revealed that all the seed quality parameters were positively associated among themselves. Electrical conductivity showed negative association with all seed quality parameters. Values observed from 48 hours artificially aged seed reported results equivalent to three years naturally aged seeds. Assessment of seed lot at 48 hours of artificial ageing can be used to determine seed lot field performance after storage.