Assessment of genetic variability for quantitative characters in rice (Oryza sativa L.) under post flood situation in sali

2021 ◽  
Vol 58 (1) ◽  
pp. 43-48
Author(s):  
Dalibha Pathak ◽  
Umesh Ch. Kalita
Keyword(s):  
Grain Yield ◽  
Coefficient Of Variation ◽  
Quantitative Traits ◽  
Oryza Sativa L ◽  
Block Design ◽  
Genetic Advance ◽  
Spikelet Sterility ◽  
Rice Varieties ◽  
Randomized Block Design ◽  
Spikelets Per Panicle

Sixteen genotypes of rice (including one check) were evaluated on 18 quantitative traits during sali (August), 2018 in a randomized block design with three replications at Instruction cum Research Farm, Department of Plant Breeding and Genetics, Assam Agricultural University, Jorhat to study the nature and magnitude of variability, heritability and genetic advance under delayed sown condition. The analysis of variance for 18 quantitative traits revealed the presence of significant differences for grain yield and its component characters. The highest genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) was observed for chaffs per panicle followed by grains per panicle, spikelet sterility (%), spikelets per panicle, grain yield (kg/ha). A high heritability coupled with high genetic advance was observed for plant height (cm), spikelets per panicle, spikelet sterility (%), chaffs per panicle, grains per panicle, grain yield (g/hill), grain yield (kg/ha), biological yield (kg/ha), straw weight (kg/ha) and harvest index (%) indicating that selection might be effective for improvement of these characters under delayed sown condition with low input. From the findings of this investigation, one genotype viz., Gandhari emerged as the outstanding genotype which yielded 4170 kg/ha and could be directly used for cultivation in delayed sown situation with low inputs. Some other promising genotypes that yielded higher than the check Manoharsali under delayed sown condition were JR 29, JR 16, Basundhara and JR 60 and could be utilized as potential parental material in the hybridization programmes designed to develop suitable rice varieties for delayed sown situation.

scholarly journals Exploring the Relationship between Yield and Yield Attributing Traits in Advanced Breeding Lines of Rice (Oryza sativa L.)

2021 ◽  
pp. 350-358
Author(s):  
Danish Mushtaq ◽  
Bupesh Kumar ◽  
Praveen Singh ◽  
Manmohan Sharma ◽  
Ashish Sheera
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Oryza Sativa L ◽  
Association Studies ◽  
Block Design ◽  
Phenotypic Expression ◽  
Panicle Length ◽  
Rice Varieties ◽  
Breeding Lines

Aim: Present study endeavors to explore the genetic variability for various agro-morphological and quality traits as well as to delineate the association between grain yield and its yield attributing components Study Design: Randomized Complete Block Design Place and Duration of Study: Division of Plant Breeding and Genetics, She-e-Kashmir University of Agricultural Sciences and Technology of Jammu during kharif 2020. Methodology: A experiment was carried out to determine the association between grain yield and yield attributing components among advanced breeding lines of rice to establish a well grounded selection criteria for developing rice varieties with improved grain yield. Phenotypic coefficient of variation (PCV) was found to be relatively greater than the genotypic coefficient of variation (GCV) for most of traits indicating role of environment in the phenotypic expression of traits. Characters viz., plant height, total number of tillers per plant, number of effective tillers per plant, panicle length and grain yield per plant exhibited high heritability coupled with high genetic advance indicating their efficient inheritance from preceding generations. Results: Association studies indicated that characters viz., Plant height, total number of tillers per plant, number of effective tillers per plant, panicle length, 1000 grain weight and grain yield per plant had a significant positive relationship with grain yield per plot indicating their role in breeding rice varieties for higher grain yield. Conclusion: Cause and effect relationship revealed that traits viz., days to 50 per cent flowering, total number of tillers per plant, days to maturity, panicle length and grain yield per plant can be exploited for indirect selection for improving grain yield.

scholarly journals Assessment of Genetic Variability and Transmissibility Index in Rice Genotypes (Oryza sativa L.)

2021 ◽  
pp. 34-42
Author(s):  
Ashish Sheera ◽  
Nashra Aftab ◽  
Sandeep Rout ◽  
Udit Nandan Mishra ◽  
Bupesh Sharma ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Coefficient Of Variation ◽  
Oryza Sativa L ◽  
Block Design ◽  
Uttar Pradesh ◽  
Grain Filling ◽  
Randomized Block Design ◽  
Significant Difference ◽  
Days To Maturity

Aim: To assess the Genetic Variability among the accession/ genotype and its contributing traits. Methodology: A field experiment was conducted using 35 genotypes including 2 checks of rice during the season of kharif, 2017, at the Field Experimental Centre, Department of Genetics and Plant Breeding, SHUATS, Prayagraj, Uttar Pradesh to evaluate genetic variation and heritability of yield and related traits. The experiment was designed with a randomized block design (RBD) with three replications. Analysis of variance revealed significant difference among the genotypes for all traits indicating existence of genetic variability among the accessions. Results: Highest genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were recorded for Spikelet’s per panicle, tillers per hill, panicle per hill and grain filling. High heritability in broad sense was obtained for days to 50% flowering (99.6%), days to maturity (98.7%), test weight (97.9%), harvest index (96.9%) and grain yield per hill (96.6%) which is indicating the high heritable portion of variation. High to medium estimate of heritability in genetic advance were obtained for grain yield (38.51), spikelet’s/ panicle (37.94), panicle/ hill (36.97) were indicating the roles of additive gene action and good scope of selection using their phenotype performance. Interpretation: Considering, all of these characters, spikelet’s per panicle, days to 50% flowering and days to maturity were important yield related traits and could be used for selection in future rice breeding programme.

scholarly journals Trait Association and Path Analysis Studies of Yield Attributing Traits in Rice (Oryza sativa L.) Germplasm

2020 ◽  
Vol 11 (6) ◽  
pp. 508-517
Author(s):  
Sneha Gupta ◽  
◽  
Sameer Upadhyay ◽  
Ganesh Kumar Koli ◽  
Sanket Rajendra Rathi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Oryza Sativa L ◽  
Block Design ◽  
Rice Variety ◽  
Genetic Advance ◽  
Environmental Variance ◽  
Positive Effects ◽  
Randomized Block Design ◽  
Correlation And Path Analysis

Forty-eight Rice germplasm were undertaken for estimating variability, heritability, genetic advance, correlation and path analysis for yield and yield attributing traits. The experiments were conducted in a randomized block design with three replications during two-season viz., July-Oct, 2017 and July-Oct, 2018 at the Agriculture Research Farm, Institute of Agricultural Sciences, Banaras Hindu University Varanasi. Analysis of variance revealed that genotypes contain significant differences for all the traits. High estimates of GCV and PCV were observed for traits like filled grains panicle-1 followed by total grains panicle-1, grain yield plant-1 and number of effective tillers plant-1. High heritability coupled with high genetic advance as % of mean was observed for the traits viz. plant height, days to 50% flowering and test weight. These characters exhibited less influence of environmental variance in their inheritance and hence could be improved by means of simple selection. Path analysis revealed that characters like filled grains panicle-1, total grains panicle-1 and number of effective tillers plant-1 had prominent direct positive effects on grain yield plant-1. Genotypes LC-53, LC-55 and LC-50 and LC-59 were found to be superior for yield and contributing traits during July-Oct, 2017 and July-Oct, 2018 respectively while LC-90 was found to be consistently overling under both seasons. Genotypes LC-54 and LC-56 were earliest in flowering and maturity suggesting that they can be used as a donor in hybridization programme for evolving early maturing rice variety.

scholarly journals Genotype selection and addition of fertilizer increases grain yield in upland rice in Suriname

2017 ◽  
Vol 47 (3) ◽  
pp. 185-194 ◽  
Author(s):  
Adriano Stephan NASCENTE ◽  
Ruby KROMOCARDI
Keyword(s):  
Grain Yield ◽  
Management Practices ◽  
Upland Rice ◽  
Block Design ◽  
Field Trials ◽  
Application Rate ◽  
Rice Grain ◽  
Rice Varieties ◽  
Local Conditions ◽  
Randomized Block Design

ABSTRACT The upland rice farmers in Suriname use local varieties and low level technologies in the field. As a result, the upland rice grain yield is low, at about 1 000 kg ha-1. Our objective was to evaluate the use of upland rice cultivars from Suriname and Brazil, and the effect of nitrogen, N, phosphorus, P, and potassium, K, fertilizers on cultivation variables. We undertook four field trials in the Victoria Area, in the Brokopondo District, using a randomized block design each with four replications. The most productive rice varieties were BRS Esmeralda (grain yield 2 903 kg ha-1) and BRS Sertaneja (2 802 kg ha-1). The highest grain yield of 2 620 kg ha-1 was achieved with a top dressing application of 76.41 kg N ha-1 20 days after sowing. For P, the highest grain yield of 3 085 kg ha-1 was achieved with application of 98.06 kg ha-1 P2O5 applied at sowing. An application rate of 31.45 kg ha-1 of K2O at sowing achieved the highest grain yield of 2 952 kg ha-1. Together, these application rates of N, P and K resulted in rice grain yield of about 3 000 kg ha-1, which is three times greater than the national average for upland rice. We demonstrate that the use of improved rice varieties matched to the local conditions, and application of appropriate fertilizers, are management practices that can result in significant increases in rice grain yield in Suriname.

scholarly journals Performance of F2 Rice (Oryza sativa L.) Segregants Derived from a Cross the BPT-5204 / IR-64Drt1

2020 ◽  
pp. 31-47
Author(s):  
Anjani Kumar ◽  
D. N. Singh ◽  
Krishna Prasad ◽  
Avinash Pandey
Keyword(s):  
Grain Yield ◽  
Field Condition ◽  
Significant Variation ◽  
Oryza Sativa L ◽  
Block Design ◽  
Drought Condition ◽  
Normal Field ◽  
Randomized Block Design ◽  
Rice Genotypes ◽  
Selection Of

The present investigation was carried out with F2 plants from a cross between two parents i.e., BPT-5204 and IR-64Drt1. The selection of parents for crosses was made based on genotypes that were tolerant and susceptible to drought condition. BPT-5204 was drought susceptible and IR-64Drt1 was also tolerant to drought. In this experiment adequate amount of variability was detected for grain yield per plant and its components among 324 segregants evaluated under augmented randomized block design II in normal field condition. The analysis of variance for grain yield and its attributing characters among blocks, treatments, entries, checks and checks vs entries revealed presence of significant variation in the segregants studied. However, with respect to checks, non-significant differences were recorded for only L/B ratio. The results indicated that among 324 rice genotypes including checks, only 9 rice genotypes expressed higher yield compared to seven checks varieties under normal field condition. The segregants S-51, S-122, S-135, S-195, S-199, S-210, S-219, S-222, S-251 were top ranking genotypes with respect to all checks.

scholarly journals Organic Fertilizer Titonia Plus and Micro Nutrients Improved Rice (Oryza sativa L.) Production in Koto Panjang and Koto Tingga, Padang City, West Sumatera, Indonesia

2020 ◽  
Vol 7 (01) ◽  
pp. 22-27
Author(s):  
Nalwida Rozen ◽  
Gusnidar Gusnidar ◽  
Nurhajati Hakim
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Block Design ◽  
Organic Fertilizer ◽  
Chemical Fertilizer ◽  
Rice Grain ◽  
Randomized Block Design ◽  
On Farm

A series of on-farm fi eld experiments were conducted in two locations in Padang, Koto Panjang and Koto Tingga, West Sumatera, Indonesia in 2015. The purpose of the experiment was to establish the formula of organic fertilizer derived from Tithonia supplied with micro nutrients, Zn and Mn, on rice. The experiments were conducted using completely-randomized block design with six treatments and three replications. The treatments were P = Tithonia Organic Fertilizer Plus (TOFP) + 3.0 kg Mn.ha-1, Q = TOFP + 3.0 kg Mn.ha-1+ 3.0 kg Zn.ha-1, R = TOFP + 4.5 kg Mn.ha-1 + 6 kg Zn.ha-1, S= TOFP + 4.5 kg Mn.ha-1+ 9 kg Zn.ha-1, T = TOFP only, U = 100% chemical fertilizer only. Treatment with micro nutrients as addition to TOFP (TOFP+ 3.0 kg Mn.ha-1 and TOFP+ 3.0 kg Mn.ha-1+3.0 kg Zn.ha-1) increased rice grain yield by 80 g per clump.

scholarly journals Variability, Heritability, Genetic Advance and Interrelationships for Agronomic and Yield Traits of Sorghum B-Lines under Different Environments

2018 ◽  
pp. 1-13
Author(s):  
A. M. M. Al-Naggar ◽  
R. M. Abd El-Salam ◽  
M. R. A. Hovny ◽  
Walaa Y. S. Yaseen
Keyword(s):  
Grain Yield ◽  
Coefficient Of Variation ◽  
Block Design ◽  
Selection Criterion ◽  
Genetic Advance ◽  
Planting Dates ◽  
High Heritability ◽  
Selection For ◽  
Strength Of Association ◽  
B Lines

Information on heritability and trait association in crops assist breeders to allocate resources necessary to effectively select for desired traits and to achieve maximum genetic gain with little time and resources. The objectives of this investigation were to determine the amount of genetic variability, heritability, genetic advance and strength of association of yield related traits among sorghum lines under different environments in Egypt. Six environments with 25 sorghum B-lines were at two locations in Egypt (Giza and Shandaweel) in two years and two planting dates in one location (Giza). A randomized complete block design was used in each environment with three replications. Significant variation was observed among sorghum lines for all studied traits in all environments. Across environments, grain yield/plant (GYPP) showed positive and significant correlations with number of grains/plant (r = 0.71), days to flowering (r = 0.47), 1000-grain weight (r = 0.16) and plant height (PH) (r = 0.19). In general, the estimates of phenotypic coefficient of variation (PCV) were higher than genotypic coefficient of variation (GCV). Combined across the six environments, the highest PCV and GCV was shown by PH trait (95.14 and 43.57%) followed by GYPP (36.42 and 30.78%), respectively, indicating that selection for high values of these traits of sorghum would be effective. GYPP and PH traits showed high heritability associated with high genetic advance from selection, indicating that there are good opportunities to get success in improvement of these traits via selection procedures. Results concluded that PH is good selection criterion for GYPP and therefore selection for tall sorghum plants would increase grain yield.

Keragaman Agronomi Tanaman Padi (Oryza sativa L.) Varietas Pandan Putri pada Beberapa Sistem Tanam di Kecamatan Mundak Jaya Kabupaten Indramayu

2018 ◽  
Vol 1 (2) ◽  
pp. 1-7
Author(s):  
Yudhi Mahmud
Keyword(s):  
Oryza Sativa ◽  
Grain Yield ◽  
Plant Height ◽  
Oryza Sativa L ◽  
Block Design ◽  
Cropping System ◽  
Growth And Yield ◽  
Randomized Block Design

This reserach aims was to determine the effect of planting systems on the growth and yield of Pandan Putri  plants in several planting systems in Mundak Jaya Subdistrict, Indramayu Regency. The experiment used a randomized block design with four treatments, each treatment was six replication. The results showed that the treatment of legowo 2: 1 cropping system gave the highest effect for plant height per clump, number of tillers per clump, number of panicles per clump and dry milled grain yield per hectare and legowo 2: 1 cropping system gave the highest yield of dry unhulled rice, which is 5.19 tons / ha and was significantly different from other treatments

scholarly journals Evaluation of Growth and Physiological Responses of Three Rice (Oryza sativa L.) Varieties to Elevated Temperatures

2019 ◽  
Vol 6 (01) ◽  
pp. 17-23
Author(s):  
Dede Yudo Kurniawan ◽  
Ahmad Junaedi ◽  
Iskandar Lubis ◽  
Titi Candra Sunarti
Keyword(s):  
Elevated Temperatures ◽  
Oryza Sativa L ◽  
Block Design ◽  
Physiological Responses ◽  
Dry Weight ◽  
Maximum Temperature ◽  
Rice Varieties ◽  
Shoot Dry Weight ◽  
Randomized Block Design ◽  
Two Factors

Temperature is a primary factor that affects the rate of plant development and has great impacts on plant growth, metabolism, and yield. A study was conducted to analyze the effects of elevated temperature on rice morphological and the physiological growth. The research was arranged in a nested randomized block design consisting of two factors, temperatures and rice varieties. Elevated temperatures were provided through the uses of different materials of plastic roof and walls to have an average and maximum temperature of 27.6 °C and 41.6 °C (T1); 28.1°C and 43.8 °C (T2), and 29.5°C and 47.1 C (T3), respectively. The study used three varieties of rice, “Ciasem”, “Ciherang”, and “IR64”. All rice varieties showed signifi cant increases in tiller number per hill and shoot dry weight, but had a decrease in the stomatal conductance, transpiration rate, and SPAD values at grain fi lling stage with the increasing temperatures. The number of tiller per hill increased when temperature was elevated from 27.6 to 28.1 and 29.5°C by about 29.9 and 21.3%, respectively.

scholarly journals Genetic variability and agronomic performance studies in chilli (Capsicum annum L.)

2017 ◽  
Vol 14 (2) ◽  
pp. 56-62
Author(s):  
D Kannan ◽  
DK Singh ◽  
SK Singh ◽  
A Palanisamy
Keyword(s):  
Genetic Variability ◽  
Performance Studies ◽  
Coefficient Of Variation ◽  
Block Design ◽  
Stem Diameter ◽  
Agronomic Performance ◽  
Genetic Advance ◽  
Plant Weight ◽  
Capsicum Annum ◽  
Randomized Block Design

Eight diverse genotypes of chilli were evaluated an open field study to evaluate the genetic variability, heritability and genetic advance in randomized block design (RBD) with three replications during Kharif, 2015-16. Analysis of variance revealed significant differences among the genotypes for all the characters studied. The higher estimates of genotypic coefficient of variation (GCV) were observed for flowers per branch (21.59%), clusters per plant (19.26%), flower per branch (16.93%) and stem diameter (15.49%). While the higher estimates of phenotypic coefficient of variation (PCV) were found for flowers per branch (26.70%), fruits per branch (24.44%), clusters per plant (24.04%) and stem diameter (19.26%). The higher estimates of broad sense heritability along with genetic advance recorded for flowers per branch (65%), fruits per plant (64%), cluster per plant (64%), stem diameter (65%), plant weight (59%) and days to 50% flowering (50%) indicated the scope for improvement of these characters through selection.SAARC J. Agri., 14(2): 56-62 (2016)

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