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Theses

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1981 - 19845
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Subject: Agriculture × Author: KAU × End date: 1989 × Thesis Type: Ph.D ×
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Now showing 1 - 5 of 5
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    ThesisItemOpen Access
    Cytogenetic studies on intervarietal hybrids of sesamum (Sesamum indicum L.)
    (Department of Agricultural Botany, College of Agriculture Vellayani, Trivandrum., 1984) Chandramony, D; KAU; Krishnan Nair, N
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    ThesisItemOpen Access
    Studies on heterosis and combining abilities with respect to important economic traits in Capsicum annuum, L.
    (Division of Agricultural Botany, College of Agriculture, Vellayani, 1981) Manikantan Nair, P; KAU; Mary, K George
    Sixty three varieties of Capsicum annuum representing different agroclimatic regions of the country constituted the base material of the study. Based on yield potential , adaptability and tolerance to leaf curl complex disease, thirty varieties were selected for subsequent studies. Comprehensive genetic studies including estimation of genetic parameters, cause effect relationship by path coefficient analysis, genetic divergence by Mahalanoble D2 statistic and a nine parent diallel analysis to causes the combining ability, to unravel the pattern of inheritance and also to examine the level of heterosis manifested with respect to eighteen economic characters including four nutritiveand quality attributes namely Vitamin A, Vitamin C, Capsaicin and Oleoresin content were conducted during the year 1976-79. Analysis of plot means exhibited highly significant differences among varieties except for Capsaicin content. The high degres of variability in economic attributes offers scope for recombining desirable genes from different varieties.
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    ThesisItemOpen Access
    Biometric analysis of yield and certain yield attributes in the para rubber tree: Hevea Brasiliensis Muell. Arg.
    (Department of Agricultural Botany, College of Agriculture, Vellayani, 1984) Markose, V C; KAU; Mary, K George
    The para rubber tree, Hevea brasiliensis, is the commercial source of natural rubber. Introduced into the Far East in 1876, from Brazil, commercial cultivation started in India during 1902. The tree has a gestation period of six to seven years. A large number of clones have been evolved through ortet selection and through hybridisation, which show variability for different characters. The present study was undertaken to estimate (1) productivity (2) yield pattern (3) variability (4) correlations (5) effect of yield attributes (6) genetic diversity of twenty clones, and (7) early growth vigour of open pollinated seedlings of selected clones.
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    ThesisItemOpen Access
    Seed germination and tissue culture studies in orchids
    (Division of Horticulture, University of Agricultural Sciences, Bangalore, 1982) Ramachandran Nair, S; KAU; Foja Singh
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    ThesisItemOpen Access
    Genetic studies in brlnjal with relation to bacterial wilt resistance
    (Department of Agricultural Botany, College of Agriculture, Vellayani, 1983) Gopimony, R; KAU; Krishnan, Nair N