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Subject: Seed Science and Technology × Author: Rana, Rakesh × End date: 2009 × Start date: 2003 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Characterization and vigour assessment of cluster bean (Cyamopsis tetragonoloba (L.) Taub.)
    (CCSHAU, 2006) Rana, Rakesh; Deswal, D.P.
    A study was conducted on “Characterization and vigour assessment of cluster bean (Cyamopsis tetragonoloba (L.) Taub.)” by applying some field and laboratory tests. Plant morphological characters like plant growth habit, leaf pubescence, leaf margin, flower colour and pod shape were found to be most important diagnostic characters for cultivar identification in cluster bean. Some other character such as number of pod per cluster, days to 50 per cent flowering and pod size were also helpful in identification but cannot be referred as reliable trait for cultivar identification because of effect of location and management. Some seed morphological characters like 100-seed weight and seed shape were also found helpful to differentiate the cluster bean cultivars. The differential response of cluster bean cultivars to different chemical tests such as phenol test, peroxidase test, KOH-bleach test and potassium hydroxide test was found to be accurate means of classification which shows the reliability and quickness of these chemical tests. The schematic diagram on the basis of morphological traits has higher resolution in terms of differentiating among the genotypes. On the other hand the laboratory tests though not so laborious but has less resolving capacity to differentiate among genotypes. The significant mean sums of squares due to genotypes for all the seed vigour parameters revealed the existence of sufficient amount of variability. The correlation study showed the significant and positive association among all the seed quality parameters except electrical conductivity, which showed negative association with other quality parameters.