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M. Sc. Dissertations

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20111
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Subject: Seed Science and Technology × Author: Ananda, H.A. × Start date: 2009 ×
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    ThesisItemOpen Access
    Studies on seed viability and vigour in pearl millet [Pennisetum glaucum (L.)R. Br]
    (CCSHAU, 2011) Ananda, H.A.; Deswal, D.P.
    Twenty genotypes of pearl millet were evaluated for seed quality by various viability, vigour tests with three replications and observations were recorded on standard germination, seedling length, seedling dry weight, seed weight, seed density, vigour index-I, Vigour Index-II, accelerated ageing test, electrical conductivity, tetrazolium test, dehydrogenase activity test, pH exudates test, field emergence index, seedling establishment and mean emergence time .Significant mean squares values showed the wide variation among the genotypes for all studied parameters. The hybrids were superior for most of the vigour and viability parameters than their parental lines. The hybrids namely HHB 216 and HHB 226 ranked at top in almost all parameters. Among ‘R’, ‘A’, and ‘B’ lines HTP 3/13, HMS 7A and HMS 37B respectively were found superior, based on majority of viability and vigour tests.on the other hand ‘A’ line ICMA 97111 and ICMA 94555 has shown lowest rank in most of parameters. All the parameters were significantly positively correlated with standard germination except seedling dry weight, seed density and pH exudates test whereas, field emergence also showed the positive correlation with all parameters except seedling dry weight and pH exudates test. The electrical conductivity was negatively correlated with standard germination and field emergence. Tetrazolium test followed by vigour index-II showed highest reliability for prediction of standard germination whereas standard germination followed by tetrazolium showed the highest reliability for prediction of field emergence. Correlation coefficient analysis and regression analysis revealed that vigour and viability parameters viz., tetrazolium test, Dehydrogenase activity test, vigour indices, electrical conductivity and accelerated ageing, can be used as reliable predictors of standard germination and field emergence in pearl millet. The tetrazolium test and electrical conductivity test should be most preferred as they are not only quick and cost effective but also easy to perform.