2. Institutional Publications

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Author: search.filters.author.Gopalakrishnan, P K

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    Variability in selected varieties of cowpea Vigna unguiculata Walp
    (Kerala Agricultural University, 1980) Ramachandran, C; Peter, K V; Gopalakrishnan, P K
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    Variability studies for biochemical traits in bitter gourd
    (Kerala Agricultural University, 1980) Ramachandran, C; Gopalakrishnan, P K
    Genetic variability was estimated for various biochemical traits in a collection of 25 diverse types of bitter gourd at the College of Horticulture, Vellsnikkara, Trichur. The differences among the types were highly significant for all the traits, The characters such as vitamin C content, phosphorus content total soluble solids and iron content having high or moderate estimates of heritability and high genetic gain are suggested to be controlled by additivegenes and the rest of the traits by non-additive genes. The association analysis among the quality factors has indicated that the improvement of total soluble solids will improve the vitamin C content, phosphorus content and potassium content in the fruits and yet maintain a reasonably high protein content.
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    Variability in some chemical constituents of pumpkin Cucurbita moschata poir.
    (Kerala Agricultural University, 1980) Gopalakrishnan, R; Gopalakrishnan, P K; Peter, K V
    Significant variability was observed for carotene, protein, phosphorus, calcium and T S S contents of fruits in pumpkin. Maximum variability associated with highest heritability and genetic advance was observed for carotene content of fruit and there is good scope for improvement of this character in pumpkin Carotene content was positively correlated with potassium content of fruit. Path analysis indicated that potassium content had maximum direct effect on carotene content of fruits.
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    Growth, yield and quality of Kaempferia galanga L. as influenced by planting time and type of seed material
    (Kerala Agricultural University, 1985) Rajagopalan, A; Gopalakrishnan, P K
    Asplit plot experiment was conducted at the College of Horticulture, Vellanikkara during 1982-83 with a view to find out the best planting time and type of seed material in Kaempferia gaianga L The treatments included were three planting time, viz., 3rd week of May, 1st week of June and 2nd week of June and two types of seed materials, viz., motherand finger rhizomes. Planting time had significant influence on the number of leaves per plant, leaf width, total leaf area and rhizome yields. Mother rhizome planted during the third week of May was significantly superior to other treatments with respect to rhizome and oleoresin yields. A net income of Rs. 4,316.00 per hectare could be obtained from the crop planted on 3rd week of May using mother rhizomes.
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    Relative susceptibility of brinjal lines resistant to bacterial wilt (Pseudomonas Solanacearum Smith)
    (Kerala Agricultural University, 1985) Gopalakrishnan, T R; Gopalakrishnan, P K
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    Response of chilli genotypes to ethephon whole plant sprays
    (Kerala Agricultural University, 1985) Indira, P; Gopalakrishnan, P K; Peter, K V
    Response of chilli genotypes to 4 levels of ethephon (0,100, 200 and 300 ppm) was studied during May-December 1981 and October-March 1981-82 seasons. The 4 levels of ethephon made significant differences for days to first fruitset and days to first red chilli harvest. Yield increased with ethephon application though it was not statistically significant. Plant stature was affected resulting in dwarf plant habit. Differential response to ethephon application was recorded only for days to first fruitset. Ethephon has only a limited use in chilli.
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    Genetic distance among five botanical varieties of Cucumis melo
    (Kerala Agricultural University, 1986) Subha Mary Mathew; Gopalakrishnan, P K; Peter, K V
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    Variability in a set of chilli lines
    (Kerala Agricultural University, 1987) Gopalakrishnan, T R; Gopalakrishnan, P K; Peter, K V
    The study was aimed to estimate variability in the existing germplasm of chilli and to study components of variation. Significant differences were observed for many of the quantitative characters. Phenotypic coefficient of variation was maximum for fruits/plant (75.16) followed by fruit length (59.21) and main stem length (55.87). Fruit yield/plant recorded only moderate value of pcv (43.54) High heritability coupled with high genetic advance was observed for fruit length and main stem length. Fruits/plant had moderately high estimates of heritability and expected genetic advance. Days to flower, days to red chilli harvest and fruit girth having high heritability estimates had only low expected genetic advance. There is scope to evolve chilli line with long fruit aTid more fruits/plant through simple selection method.
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    Effects of graded doses of nitrogen, phosphorus and potassium on yield of pumpkin (Cucurbita Moschata Poir)
    (Kerala Agricultural University, 1983) Rajendran, P C; Gopalakrishnan, P K; Gopalakrishnan, T R; Peter, K V