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1970 - 197911980 - 19811
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Subject: Agriculture × Author: KAU × Author: Manikantan Nair, P × End date: 1998 × Type: Thesis ×
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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
    Cytomorphological and chemical studies on intervarietal crosses of Capsicum annuum, L.
    (Division of Agricultural Botany, Agricultural College & Research Institute, Vellayani, 1970) Manikantan Nair, P; KAU; Mary, K George
    The cytomorphological and chemical aspects of four F1 hybrids of crosses involving five varieties of Capsicum annuum L. were studied . The variety ' Local blue' which possessed mosaic resistance , prolific bearing habit , long life span and high pungency was selected as the common seed parent. The selected pollen parents were, Russian, Indian long red , Chinese giant and Oskosh which were gifted with a higher content of ascorbic acid and sucrose and larger fruit size , but lacking the qualities of the common seed parent. 2. All the four F1 hybrids manifested a marked degree of heterosis in many economically important attributes like , carliness in blooming, number of leaves, number of branches, leaf area and chemical constituents like ascorbic acid and sucrose. 3. An intermediate condition was observed with regard to height , spread, number of fruits, fruit size and number of F2 seeds