Browsing by Author "Ibrahim, K K"
Now showing 1 - 17 of 17
- Results Per Page
- Sort Options
Item Antholysis in pepper (Piper nigrum L.)(Kerala Agricultural University, 1987) Sukumara Pillai, V; Sasikumaran, S; Ibrahim, K K; Unnikrishnan Nair, P KItem Comparative genetic variability within the open-pollinated seedlings of certain varieties of black pepper (Piper nigrum L.)(Kerala Agricultural University, 1986) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SItem Correlated responses in yield and certain component characters in pepper (Piper nigrum L.)(Kerala Agricultural University, 1987) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SItem Expression and association of spike characters in black pepper(Kerala Agricultural University, 1988) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SItem Gametocidal properties of certain chemical in rice(Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara, 1996) Manjula, M; Ibrahim, K KItem Genetic variability and correlations in nine divergent varieties of coconut(Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara, 1998) Sindhumole, P; Ibrahim, K KItem Genetic variability in nine cultivars of coconut (Cocos nucifera L.)(Kerala Agricultural University, 2000) Sindhumole, P; Ibrahim, K KAn experiment conducted at the Instructional Farm, College of Horticulture, Vellanikkara, Thrissur on nine coconut cultivars during 1995-96 in RED with three replications and three palms per plot revealed the absence of significant variation among most of the characters. Economic characters showed higher genotypic coefficients of variation (16 to 22 %) compared to vegetative and reproductive characters. Among all the characters, hcritability was maximum for petiole length (52 %) followed by the economic characters, per cent oil content and nut yield (45% each).Item Genotype environment interaction in selected hybrid lines of sweet potato (Ipomoea batatas (L.) Lam.)(Department of Agricultural Botany, College of Agriculture, Vellayani, 1980) Ibrahim, K K; Mary K GeorgeItem Genotype X season interaction and stability parameters in black pepper (Piper nigrum L)(Kerala Agricultural University, 1985) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SGenotype x season interaction and stability parameters for five varieties of pepper for yield was studied at the Pepper Research Station, Panniyur, Jjy utilizing the data recorded over five seasons from 1979-80 to 1983-84. The genotype x season interaction was observed to be significant and a larger portion of it was through the non-linear component. The stability model proposed by Eberhart and Russell (1966) was resorted to in describing the stability parameters of varieties. In this study, the variety Kuthiravaly, was found to be the most stable variety. Panniyur 1 is a high yielding variety especially suited to favourable environments, but can also be considered as more stable variety than Arakkulam Munda, Kalluvally and Balankotta.Item Genotypic and phenotypic correlations among yield and its components in black pepper (Piper nigrum L)(Kerala Agricultural University, 1985) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SData on 28 genotypes of pepper recorded for three seasons, at the Pepper Research Station, Panniyur was utilized to estimate genotypic and phenotypic correfation coefficients in certain quantitative characters in pepper, in general, the characters showed higher genotypic correlation as compared to phenotypic correlation. All the component characters except berry weight were found to be significantly and positively correlated with the yield. On the other hand, berry weight had significant negative association with the yield and other components except spike length. Such relationship observed between pairs of characters will be helpful in planning breeding programmes in this crop.Item Heterosis in Panniyur 1 black pepper (Piper nigrum L.)(Kerala Agricultural University, 1987) Sukumara Pillai, V; Ibrahim, K K; Sasikumaran, SItem N, P and K requirement of black pepper(Kerala Agricultural University, 1987) Sukumara Pillai, V; Sasikumaran, S; Ibrahim, K KAn experiment, to identify the optimum levels of N, P and K for black pepper was conducted at the Pepper Research Station, Panniyur, Kerala in 33 factorial design completely confounding NPaK2. Analysis of the data collected for eight seasons showed that the economically optimum level of nutrients was 50, 100 and 150g of N, P205 and K20 respectively per vine per annum.Item Potential of the black pepper cultivar uthirenkotta in the hybridization programme(Kerala Agricultural University, 1988) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SItem Prediction of rainfall at Taliparamba by statistical methods(Kerala Agricultural University, 1986) Ibrahim, K K; Unnikrishnan Nair, P K; Mathew KurianItem Seed germination studies in panniyur-1 black pepper(Kerala Agricultural University, 1993) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SItem Variability in morphological, physiological and biochemical characters in kalmegh (Andrographis paniculata Nees.)(Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara, 2000) Laju Paul, K; Ibrahim, K KAn experiment ID kalmegh (Andrographis panicu/ata Nees.) was conducted in the Department of Plant Breeding and Genetics, College of Horticulture, Vellanikkara during 1998-2000, with the objectives of understanding the morphological variability, growth pattern, optimum stage of harvest and the variation in different biochemical compounds among the accessions. The accessions were collected from Kerala and neighbouring states. Ten accessions were compared based on 50 morphological, 16 physiological and 3 biochemical characters. In general, accessions showed uniform root, inflorescence, flower and fruit characters. However a limited variation for habit, stem and leaf characters existed among most of the accessions. In general, accessions showed variability for characters namely total plant dry weight, stem dry weight, leaf dry weight and root dry weight when observed at 1, 2, 3 and 4 months after transplanting. Ranking of the accessions was not consistent on the various dates of harvest. Optimum stage of harvest is recommended as 3 months after transplanting. At this stage maximum herbage yield was recorded by accession Ac-4. Physiological parameters namely Leaf area and LAI showed steady increase up to three months after transplanting and thereafter it declined. LAR, RGR, CGR and NAR recorded higher values at earlier dates. Heritability (broad sense) of characters showed inconsistency at various dates of harvest. However leaf dry weight showed higher heritability on all dates. At 3 months after transplanting i.e. the optimum stage of harvest, heritability was high for all the characters relating to herbage yield and most of the physiological parameters. Biochemical studies revealed that the total phenol content and andrographolide content varied considerably among the accessions. Phenol content in the plant increased with an increase in dry weight while Andrographolide content increased with a proportionate increase in moisture content.Item Variability, heritability and genetic advance for certain quantitative characters in black pepper(Kerala Agricultural University, 1985) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SData on 28 genotypes of pepper recorded for three seasons, at the Pepper Research Station, Panniyur was utilized to estimate genotypic and phenotypic variability, heritability and genetic advance in certain quantitative characters of pepper. Spike yield and spike number have shown maximum genotypic and phenotypic variability, but lowest values for heritability. Berry weight has shown highest value for heritability and minimum genotypic and phenotypic variability. The character, spike yield was found to produce highest advance in the expression on selection, whereas only a marginal improvement need be expected for berry weight.