Browsing by Author "Kanakamany, M T"

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Correlation and yield component analysis in greengram (Vigna Radiata L.) in summer rice fallows
(Kerala Agricultural University, 1996) Kanakamany, M T; Gracy Mathew; Leenakumary Tessy Joseph, S; Tessy Joseph
Twelve genotypes of greengram were evaluated during summer 1995 in the rice fallows of tiie Regional Agricultural Research Station, Pattambi. WGG 62 was the highest yielder among the genotypes tested. Out of the ten characters studied the number of pods per plant, per day productivity, chlorophyll ' a' and total chlorophyll contents showed positive and significant association with grain yield. Duration of the crop was found to have no direct relation with yield.
Formulation of a key for identification of the different types of pepper, Piper nigrum L.
(Department of Agricultural Botany, College of Horticulture, Vellanikkara, 1982) Kanakamany, M T; Luckins C Babu
The studies reported herein were carried out in the Department of Agricultural Botany, College of Horticulture, Vellanikkara, during the year 1980-82 with a view to formulating a key for identification of different varieties of pepper. From the germ plasm collection maintained in the Pepper Research Scheme of the College, 45 types of uniform age were earmarked. Observations on twentyeight quantitative and seventeen qualitative characters were recorded from all the fortyfive types and the variability among the types was assessed. The study revealed that the material was highly variable with reference to many of the characters.
G x E interaction in the Fg generation of wide crosses of rice (Oryza sativa L.)
(Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara, 2003) Vidhu Francis Palathingal; Kanakamany, M T
The present study 'G x E interaction in the F6 generation of wide crosses of rice (Oryza sativa L,)' was carried out under the Department of Plant Breeding and Genetics, College of Horticulture, Kerala Agricultural University, Vellanikkara. The study was carried out for 20 characters in nine rice cultures at three locations viz., Mannuthy, Pattikkad and Adatt. The experiment estimated the variability, heritability, correlation, path coefficients and stability for the characters.High variability and heritability was noticed for most of the yield characters. The estimates of variability and heritability vaired widely between locations indicating the preponderance of the environment. Correlation and direct and indirect effects of the characters on yield also differed between the environments indicating the profound influence of location on the character. Stability analysis revealed that among the nine rice cultures studied-, culture C 26T(b) was found to be stable over locations for most of the yield traits. Culture C 26T(b) had maximum grain yield and was stable for most of the yield contributing characters like height of plant at harvest, number of productive tillers, number of spikelets per panicle, number of grains per panicle, number of days for physiological maturity, 1000 grain weight and grain yield. C 26T(b) showed superior and stable performance in the hill tracts of Pattikkad, Kole land of Adatt and at Mannuthy. Stability parameters indicated C 80 as the next stable culture. C 80 was stable for the characters total number of tillers, days to 50 per cent flowering, hulling percentage, milling percentage and amylose content.
Genetics of bruchid (Callosobruchus sp.) resistance and yield in cowpea
(Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara, 2001) Jyothi, C; Kanakamany, M T
The present study 'Genetics of bruchid (Callosobruchus sp.) resistance and yield in cowpea' was undertaken in the Department of Plant Breeding and Genetics, College of Horticulture, Kerala Agricultural University, Vellanikkara. The study was carried out to estimate the various genetic parameters of characters, to identify the yield components, to study association of characters related to pulse beetle resistance and to identify superior genotypes and hybrids having high yield and tolerance to pulse beetle. High variability among parents and hybrids was observed for most of the yield and bruchid resistance traits. The characters namely number of eggs laid, number of adult beetles emerged, number of bore holes produced, loss of weight per seed and tannin content exhibited higher values of heritability, genetic advance and genotypic coefficient of variation, indicating the preponderance of additive gene effects. A positive association was found to exist among yield attributes and also with yield in parents and hybrids. Genotypes having a thicker seed coat showed better resistance to pulse beetle attack and this character was found to be independent in gene action. Kanakamoni among the lines and EC 390231 among the testers were found to be the most promising genotypes for hybridization and selection since they recorded high positive gca. For heterosis breeding the crosses Kanakamoni x IC 201092 followed by C 152 x EC 390231 were found to be superior for pod yield. Kanakamoni and C 152 among the lines and EC 390231 and IC 201092 among the testers showed high tolerance to pulse beetle attack and are recommended for evolving resistant varieties using these genotypes through hybridization and selection. For evolving hybrids showing resistance to pulse beetle the crosses, C 152 x EC 367711 and V 240 x IC 201092 were rated supreme.
Induction of genetic variability in kacholam(Kaempferia Galanga L.)
(Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara, 1997) Kanakamany, M T; Namboodiri, K M N
Influence of storage environment and packing materials on seed germination and viability of Desmodium gangeticum (L.) DC. and Indigofera tinctoria (L.)
(Academy of Climate Change Education and Research Vellanikkara, 2017) Gayathri, P; Kanakamany, M T
Desmodium gangeticum and Indigofera tinctoria are valuable medicinal plants frequently used in the Indian System of Medicine. These crops are propagated through seeds. Seeds of these crops lose viability within 3-4 months after extraction under normal conditions. In order to get optimum plant population, uniform germination has to be assured. For that it is necessary to store the seeds at appropriate environmental conditions. By modifying the storage environment and by using apt packing materials storage life of seeds can be enhanced. The present investigation “Influence of storage environment and packing materials on seed germination and viability of Desmodium gangeticum (L.) DC. and Indigofera tinctoria (L.)” was carried out at the Academy of Climate Change Education and Research, Vellanikkara and All India Coordinated Research Project on Medicinal, Aromatic Plants and Betelvines (AICRP on MAP & B), College of Horticulture, Vellanikkara during the year 2016-2017. The experiment was laid out in a completely randomized design with 18 treatments replicated twice. Observations on micrometeorological and seed quality parameters (1000 seed weight, seed moisture content, germination percentage, seedling root length, seedling shoot length, seedling fresh weight and seedling dry weight) were recorded at weekly intervals. All the seed quality parameters were significantly influenced by the individual treatments of moisture levels, packing materials and storage environments and by the combined interaction of these three factors except seedling fresh weight, seedling dry weight and 1000 seed weight at some weeks after storage. Seeds of 8% moisture content recorded higher germination percentage for both crops, higher seedling root length and shoot length for Indigofera tinctoria. Among the packing materials, polythene bag stored seeds of Desmodium gangeticum showed higher 1000 seed weight, germination and seedling shoot length at the same time cloth bag stored Indigofera tinctoria seeds recorded higher 1000 seed weight, germination and seedling root length. Seeds stored under refrigerated condition showed higher 1000 seed weight, germination percentage, seedling root length and seedling shoot length for both crops. Significant positive and negative relationships were observed due to the influence of weather parameters (maximum temperature, minimum temperature and relative humidity) on seed quality. Maximum temperature and relative humidity showed a positive relationship with majority of the seed quality parameters except seedling fresh weight of Indigofera tinctoria and seed moisture content of Desmodium gangeticum. Most of the seed quality parameters (1000 seed weight, seed moisture content, germination percentage, seedling shoot length and seedling fresh weight) were negatively influenced by minimum temperature. Results of the investigation implies that, to enhance the germination of seeds over a period of 12 weeks of storage it is better to dry the seeds to 8% moisture content and pack in polythene bags for Desmodium gangeticum seeds , cloth bags for Indigofera tinctoria seeds and store under refrigerated environment.
Masters’ and doctoral seminar reports -2014-Volume – II-Agrl. Meteorology, Agrl. Entomology, Pathology, Agrl. Microbiology
(College of Horticulture, Kerala Agricultural University, Vellanikkara, 2014) Kanakamany, M T; Madhu Subramanian, S; Jayasree, Krishnankutty; Meagle Joseph, P
Masters’ and doctoral seminar reports -2014-Volume .I-Agronomy Soil Science and Agrl. Chemistry
(College of Horticulture, Kerala Agricultural University, vellanikkara, 2014) Kanakamany, M T; Madhu Subramanian, S; Jayasree, Krishnankutty; Meagle Joseph, P
Phenology of medicinal snake gourd (Trichosanthes cucumerina L.) under different seasons
(Academy of Climate Change Education and Research, Vellanikkara, 2015) Harsha Satheesh; Kanakamany, M T
The present study entitled “Phenology of medicinal snake gourd (Trichosanthes cucumerina L.) under different seasons” was carried out at Academy of Climate Change Education and Research (ACCER), Vellanikkara during the period 2014-2015. Field experiments were conducted at All India Coordinated Research Project on Medicinal, Aromatic Plants and Betel Vine (AICRP on MAP & B), College of Horticulture, Vellanikkara. The objective of the study was to assess the influence of weather parameters on yield and yield attributing characters of medicinal snake gourd (Trichosanthes cucumerina L.) under open and rain shelter during winter, summer and rainy seasons. The experiment was laid out in a randomized block design with six treatments and four replications each in open and rain shelter during winter, summer and rainy seasons. Observations on meteorological, growth characters, floral biology, yield and quality parameters were recorded under open and rain shelter in all the three seasons. Significant difference was observed in number of flowers, number of fruits produced, pollen fertility, fruit yield per plant, herbage yield per plant, total yield per plant and per plant cucurbitacin content for plants grown under rain shelter as well as in open condition during the three seasons. During winter, summer and rainy seasons crops grown under rain shelter recorded highest vine length, number of branches, maximum leaf area and number of male and female flowers produced, herbage yield per plant and dry yield per plant than open condition. Whereas pollen fertility, pollen viability and fruit weight were found to be highest in open condition than in rain shelter during summer season and found more in rain shelter during winter and rainy seasons. Earlier anthesis of both male and female flower was recorded during summer season under open condition. Highest herbage yield per plant, fruit yield per plant and total yield per plant were recorded under open condition during summer season. But during rainy season it is higher under rain shelter when compared to open field.Per plant cucurbitacin content was highest for the plants that grown under open environment than in rain shelter. It was found to be maximum during summer season followed by winter and rainy season. Weather parameters such as canopy air temperature, daily minimum and maximum temperature were high under rain shelter during the three cropping seasons. Relative humidity and soil moisture were high under rain shelter during winter and summer and low during rainy season. Correlation analysis with the weather parameters and crop was studied. Relative humidity and soil moisture had a significant negative correlation with the number of male flowers produced, pollen fertility, herbage yield per plant, total yield per plant and per plant cucurbitacin content. Canopy air temperature, minimum and maximum temperature showed positive correlation with the number of male flowers, produced pollen fertility, number of fruits, fruit yield per plant, herbage yield per plant, total yield per plant and per plant cucurbitacin content whereas rainfall had a negative correlation.