Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810035218
Authors: PRAMODKUMAR NAMPELLI
Advisor: Dr. NATARAJAN SEENIVASAN
Title: STUDIES ON IDENTIFICATION OF MORPHOLOGICAL AND PHYSIOLOGICAL TRAITS IN RELATION TO YIELD AND QUALITY OF SEED GUAR (Cyamopsis tetragonoloba (L.) Taub.) CULTIVARS UNDER RAINFED CONDITION
Publisher: COLLEGE OF HORTICULTURE, MOJERLA, MAHABUBNAGAR Dr. Y.S.R. HORTICULTURAL UNIVERSITY
Citation: student research farm, College of Horticulture, Mojerla,
Language: en
Type: Thesis
Pages: 1-150
Agrotags: null
Keywords: cultivars of seed guar,basis of mean performance of the cultivars,physiological traits contributing for drought tolerance,Analysis of Variance revealed significant differences among the genotypes for all the traits studied,PCV and GCV.
Abstract: A set of fifteen cultivars of seed guar (Cyamopsis tetragonoloba (L.) Taub.) was evaluated in a Completely Randomized Block Design with three replications at student research farm, College of Horticulture, Mojerla, Dr.YSRHU during kharif, 2014 with an objective to study the mean performance, genetic variability, association among traits, direct and indirect effects of yield components on yield and quality traits. On the basis of mean performance of the cultivars for all the traits studied, RGC 963, RGC 986, RGC 1033, HG 2-20 were found to be superior in terms of yield and quality characters. With respect to physiological traits contributing for drought tolerance, RGC 1066 recorded low chlorophyll stability index, HG 365 recorded high relative water content, RGC 1002 recorded high peroxidase enzyme activity and JJ-1 recorded high catalase enzyme activity, hence these cultivars may be grouped as drought tolerant based on the above traits and may be used for crop improvement programme for drought tolerance. The Analysis of Variance revealed significant differences among the genotypes for all the traits studied suggesting existence of considerable amount of variability among the cultivars. The phenotypic coefficient of variation (PCV) was slightly higher in magnitude than genotypic coefficient of variation (GCV) for all the traits indicating that, all traits had influence of environment to some degree. High PCV and GCV were recorded for morphological traits such as number of primary branches per plant, number of clusters per plant, number of pods per plant, pod yield per plant, pod yield per hectare, seed yield per plant, seed yield per hectare and for physiological traits such as chlorophyll stability index, peroxidase enzyme activity, catalase enzyme activity indicating the existence of wider genetic variability. High heritability coupled with high genetic advance as per cent of mean indicated operation of additive gene action for morphological traits such as plant height, number of primary branches per plant, number of leaves per plant, number of clusters per plant, number of pods per plant, number of seeds per pod, pod yield per plant, pod yield per hectare, seed yield per plant, seed yield per hectare and similar results were observed for physiological traits such as chlorophyll stability index, peroxidase enzyme activity, catalase enzyme activity, SPAD meter reading. Hence, directional selection for these traits could be effective for desired genetic improvement. The high heritability accompanied with low genetic advance (GA) as percent of mean was recorded by pod girth, seed to pod ratio, crude gum content, which indicated the presence of non additive gene action in inheritance of these traits. The high heritability is being exhibited due to favourable influence of environment rather than cultivar, hence, selection for these traits may not be rewarding. The correlation study indicated that the number of primary branches per plant, number of clusters per plant, number of seeds per pod and pod yield per plant had significant positive association with seed yield per plant at both genotypic and phenotypic levels and 100-seed weight had significant positive association with seed yield per plant at genotypic level. So improvement in seed yield per plant is possible by taking above characters as criteria in selection scheme. Path coefficient analysis study revealed that pod yield per plant and pod length at genotypic level exhibited high positive direct effect on seed yield per plant. However, pod yield per plant recorded significant, positive correlation with seed yield per plant. It clearly indicates that direct selection based on these traits would be effective for an increase in seed yield per plant. Among the quality parameters studied, the highest crude gum content (31.71%) was recorded with RGC 1033, while the lowest gum content (29.26%) was obtained with RGC 197. Pod colour also indicated considerable variability ranging from light green to green colour among the 15 cultivars studied.
Description: study the mean performance, genetic variability, association among traits, direct and indirect effects of yield components on yield and quality traits.
Subject: Horticulture
Theme: study the mean performance, genetic variability, association among traits, direct and indirect effects of yield components on yield and quality traits.
Research Problem: STUDIES ON IDENTIFICATION OF MORPHOLOGICAL AND PHYSIOLOGICAL TRAITS IN RELATION TO YIELD AND QUALITY OF SEED GUAR (Cyamopsis tetragonoloba (L.) Taub.) CULTIVARS UNDER RAINFED CONDITION
These Type: M.Sc
Issue Date: 2016-01-26
Appears in Collections:Thesis

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