Evaluation of Genetic variability, Heritability and Genetic Advance for Grain Yield components in Rice (Oryza sativa L (original) (raw)
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Assessment of Genetic Variability for Yield & Its Contributing Traits in Rice (Oryza sativa L.)
International Journal of Environment and Climate Change
The research work was executed Research cum Instructional Farm, Genetics and Plant Breeding department of IGKV Raipur (C.G.) during kharif 2021. The research material under research comprised of 50 rice germplasm lines including two checks namely Mahamaya and Rajeshwari, which were tested in RBD with two replications. The observation of research investigation were recorded for total eight characters viz. Days to 50% flowering, Number of tillers per plant, Panicle length(cm), Plant height(cm), 1000seed weight(g), Grain yield per plant(g), Biological yield per plant(g), Harvest index(%). The analysis of variance showed that there was a highly significant variation in genotypes for all of the studied characters. A small difference between PCV and GCV suggests that the environment has little impact on the concerning traits. The number of tillers per plant, 1000 seed weight, grain yield per plant, biological yield per plant and harvest index had high heritability along with high genetic ...
Genetic Variability Studies for Yield and Related Attributes in Rice Genotypes (Oryza sativa L
The present investigation was carried out during kharif 2012 at Research Farm of Genetics and Plant Breeding, Narendra Deva University of Agriculture and Technology, Narendra Nagar, Faizabad (Uttar Pradesh). The experimental material comprised of one hundred genotypes of cultivated rice and four standard check varieties (Sarjoo-52, NDR 359, PB-1 and CSR 30).Observations were obtained for days to 50% flowering, flag leaf area, plant height, panicle bearing tillers per plant, panicle length, number of spikelet's per panicle, spikelet fertility, 1000-grain weight, kernel length, kernel width, L/B ratio, biological yield per plant, harvest index, grain yield per plant. Analysis of variance showed highly significant differences due to treatments for all the characters. A wide range of phenotypic and genotypic coefficient of variability was observed. The high magnitude (>20%) of PCV along with GCV was observed for grain yield per plant, biological yield per plant, flag leaf area, number of spikelet's per panicle, panicle bearing tillers per plant, L/B ratio. Whereas, flag leaf area, 1000-grain weight, L/B ratio, kernel width and plant height showed high estimates of heritability. Harvest index, L/B ratio, flag leaf area, number of spikelet per panicle and kernel width showed high genetic advance in percent of mean. The present study revealed that there was highly genetic variability among the tested genotypes, indicating that it could be used for further improvement in rice breeding.
Journal of Pharmacognosy and Phytochemistry, 2019
The present investigation was carried out to study genetic parameters for eleven seed yield and its physiological quality contributing characters in thirty rice genotypes with three check varieties during Kharif 2016. Analysis of variance showed significant differences among all the characters under study. The phenotypic coefficient of variance was slightly higher in magnitude than that of genotypic coefficient of variance for seed yield and its physiological contributing characters indicating very less environmental influence on the expression of these traits. Higher genotypic coefficient of variation was recorded for seeds per panicle (24.22) followed by seed yield per plant (22.14) and vigour index (18.31). Heritability in broad sense estimates were higher for days to 50% flowering followed by seedling dry weight, days to maturity, plant height, vigour index and seed yield per plant. High expected genetic advances were observed for characters viz., seed yield per plant, seeds per panicle, vigour index, plant height, days to 50% flowering and seedling dry weight. High heritability along with high genetic advance as percent of mean was registered for days to 50% flowering, seedling dry weight, plant height, vigour index and seed yield per plant, this suggest that these traits can be taken as selection parameters to select elite genotypes.
Journal of Biodiversity Conservation and Bioresource Management, 2019
Genetic variability, heritability and selection response were studied among rice genotypes for yield attributing traits. Nine rice genotypes were evaluated in randomized complete block design with two replications at the University of Agriculture Peshawar-Pakistan during 2018. Significant differences were observed among the rice genotypes for all the traits. Pakhal took maximum value for Culm length (113.6 cm), Panicle length (29.05 cm), Secondary branches panicle-1 (31.4), Grain length (10 mm), Spikelets panicle-1 (162.8) and Grains panicle-1 (122.7 g). However genotype NIAB-IR-8 took maximum value for 100 grain weight (2.9 g) and Grain yield plant-1 (30.28 g). High heritability and genetic advance were observed for all the studied traits viz. Culm length (0.95 and 27.77), Panicle length (0.84 and 3.83), Grain length (0.62 and 0.78), Secondary branches panicle-1 (0.66 and 6.19), Spikelets panicle-1 (0.59 and 21.82), Grains panicle-1 (0.75 and 15.82), 100 grain weight (0.76 and 0.31...
Genetic analysis for grain yield and yield contributing traits in rice (Oryza sativa L.) Genotypes
The Pharma Innovation, 2020
The experiment was conducted during Kharif-2014 with 30 rice genotypes in Randomized Block Design having three replications at the field experimentation center of Department of Genetics and Plant Breeding, SHIATS, Allahabad, Uttar Pradesh. Pooled data of 13 quantitative and 9 qualitative characters to study genetic variability and its components. Analysis of variance among 30 genotypes showed highly significant differences for all the characters indicated the presence of substantial amount of genetic variability. On the basis of mean performance highest grain yield per hill was exhibited by the genotype HKR 08-62 followed by UPR 3425-11-1-1. Highest genotypic coefficient of variance (GCV) phenotypic coefficient variance (PCV) was observed for grain yield per hill followed by harvest index indicating that these characters could be used as selection for crop improvement. High estimates of heritability coupled with high genetic advance were observed for spikelets per panicle and biological yield per hill.
Biological Forum – An International Journal, 2023
With current trend in the population growth, the demand for food in most parts of the world is increasing year by year. However, variability in yield among the crop species may be exhausted sooner or later, limiting the potential for additional crop improvement. As a result, understanding the genetic diversity of crop species is crucial for any crop improvement programmes. Hence the present investigation was carried out at Indian Institute of Rice Research, Hyderabad during kharif 2022 with 96 rice lines to assess the genetic variability for yield and its attributing traits. Analysis of variance revealed highly significant differences for all the traits studied. The estimates of PCV were slightly higher than the corresponding GCV for days to 50% flowering, days to maturity, plant height, panicle length, number of grains/panicle, weight of grains/panicle, 1000 grain weight and SPAD indicating that direct selection can be practiced for these characters. High heritability with high genetic advance were recorded for days to 50% flowering, flag leaf length& width, number of grains/panicle, weight of grains/panicle, 1000 grain weight and SPAD before booting indicating predominance of additive gene action. Correlation studies revealed that, the grain yield/plot had a significant and positive association with number of productive tillers/meter (0.27), weight of grains/panicle (0.32), biomass/plot (0.93) and harvest index (0.40). Tocher's clustering approach was used to group all genotypes into 10 clusters in which, cluster II was found to be the largest with 47 genotypes.
Journal of Pharmacognosy and Phytochemistry, 2018
Genetic variability studies provide basic information regarding the genetic properties of the population based on which breeding methods are formulated for further improvement of the crop. The estimates of heritability, coefficients of variability and genetic advance computed for 12 yield contributing traits. Genetic parameters for yield and its correspondent characters in rice were estimated from a trial with four CMS lines, fifteen testers, three checks and sixty crosses evaluated for twelve characters related to yield. In general, the magnitude of phenotypic coefficient of variation (PCV) was higher than the corresponding genotypic coefficient of variation (GCV) for all the traits. High estimates of heritability and genetic advance in broad sense and narrow sense were recorded for all characters viz., spikelet fertility, days to 50% flowering, days to maturity, spikelets per panicle, harvest-index, L/B ratio, 1000-grain weight, plant height, grain yield per plant, biological yield per plant, panicle bearing tillers per plant, panicle length. High heritability coupled with high genetic advance in percent of mean was observed for all the traits.
Genetic Variability Analysis for Quantitative Traits in Rice (Oryza sativa L.)
Journal of Experimental Agriculture International
The present study was conducted at Agricultural and Horticultural Research station, Kathalagere, Karnataka. The experiment consisted of sixty four rice genotypes that were evaluated to study genetic variability, heritability and genetic advance for grain yield along with four yield-associated traits. The experiment was conducted using 8x8 simple lattice square design during the 2015 kharif main cropping season. The analysis of variance revealed statistically significant differences (p<0.05) indicating the existence of genetic variability among the sixty four genotypes for all the traits studied. Higher PCV and GCV values were exhibited by panicles per square meter which suggest the possibility of improving this trait through selection. The highest heritability was recorded for days to 50% flowering and plant height (cm) followed by yield kg/ha and panicles per meter square. High to medium heritability coupled with high GCV and high genetic advance as percentage of means were exhibited for plant height, panicles per square meter. High genetic advances as per cent of means were recorded by yield kg per hectare, panicles per square metre, Plant height (cm) and days to fifty per cent flowering.
Journal of Bio-Science, 2011
Context: Genetic diversity is pre-requisite for any crop improvement programme as it helps in the development of superior recombinants. Objectives: Recognizing the importance of genetic diversity in plant breeding experiments, the present research work was taken up to estimate genetic diversity in different accessions of rice for various agro-economically important characters. Materials and Methods: Experiments were carried out with 40 Rice (Oryza sativa L.) genotypes which were evaluated for yield and yield contributing traits in Kharif-2007-08. The data were recorded on 10 randomly selected plants from each replication for 12 quantitative characters studied. However days to 50% flowering was recorded on per plot basis. Mean values were subjected to analysis of variance to test the significance for each character. The genetic divergence was estimated and the grouping of the genotypes into cluster was done.Results: Sufficient amount of variability was found in the entire gene pool f...
Genetic Variability Studies for Yield and Yield Components in Rice (Oryza Sativa L.)
2015
Twenty five rice genotypes were evaluated in randomized block design with three replications to examine the nature and magnitude of variability, heritability and genetic advance. Analysis of variance revealed that differences among the genotypes were significant for all the characters studied. Further, the traits, number of tillers per plant, productive tillers per plant, number of grains per panicle and number of filled grains per panicle showed higher estimates of genotypic and phenotypic co-efficient of variation, while high estimates of heritability were recorded for all the characters under study. High heritability coupled with high genetic advance as per cent of mean was also recorded for number of tillers per plant, productive tillers per plant, number of grains per panicle and number of filled grains per panicle suggesting that these traits were more useful for targetted yield improvement programmes in rice.