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M. Sc. Dissertations

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20151
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Subject: Horticulture × Author: Vinod Kumar × Start date: 2010 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Seed quality assessment in coriander (Coriandrum sativum L.)
    (CCSHAU, 2015) Vinod Kumar; Malik, T. P.
    Seed quality plays an important role in the crop establishment and overall performance of the crop .The present investigation was carried out on fenugreek seeds having fifteen genotypes viz., DH- 333-1, DH-336, DH-337, DH-338,DH-339, DH-340, DH-341, DH-343, DH- 344, DH-345, DH-352-1 and Hisar Anand, Hisar Sugandh, Hisar Bhoomit, Hisar Surbhi. Three seed lots of each genotype included the freshly harvested, one year old and two year old stored under ambient conditions. All the fifteen genotypes of coriander having diversity in seed size and colour were taken to evaluate the seed viability/vigour parameters, to determine the inter-relationship between laboratory and field parameters, to assess the efficacy of different seed vigour tests as a predictor of field potential and to determine the speed of germination. All the seed lots were subjected to various viability, vigour tests with four replications, and observations were recorded on standard germination, seedling length, seedling fresh weight, seedling dry weight, vigour index-I, vigour index-II, seed weight, electrical conductivity, dehydrogenase activity, tetrazolium test,pH exudates test, accelerated ageing test and field emergence(%). It was observed that freshly harvested seed lot showed highest mean value for all the parameters except electrical conductivity. Among the genotypes DH-339 and Hisar Surbhi were observed to be superior for seedling length, seedling fresh weight, seedling dry weight, vigour index-I, vigour index-II, dehydrogenase activity and tetrazolium tests. The genotypes which could bear larger stress reduced more formazan and vice versa. Simple correlation studies indicated that all the viability and vigour parameters (except test weight) were positively associated among themselves. Higher the values of above said parameters, better was the seed quality and vice-versa. Electrical conductivity test showed negative association with seed quality indicating the status of membrane integrity. Genotypes DH-339 and Hisar Surbhi show better performance while genotype DH-352-1was found to be inferior under laboratory as well as field conditions than other genotypes.The standard germination, seedling vigour index-I, tetrazolium test, dehydrogenase activity test and pH exudates test emerged as reliable predictors of field emergence(%). MAJOR