Genetic Variability for Pod Yield and Component Traits in Sugar Snaps (Pisum sativum var. saccharatum)

2020 ◽  
Author(s):  
Ajay Chauhan ◽  
Akhilesh Sharma ◽  
Parveen Sharma ◽  
Viveka Katoch ◽  
Sanjay Chadha ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Block Design ◽  
Internodal Length ◽  
Breeding Lines ◽  
Pod Yield ◽  
Horticultural Traits ◽  
Component Traits ◽  
Additive Gene ◽  
High Heritability ◽  
Positive Direct

Background: Edible podded pea is an oriental vegetable crop which shares the cultivation pattern with the garden pea. Fresh tender pods lacking parchment layer are consumed whole like beans. It is a newly introduced crop in India and therefore, it would be imperative to identify the most promising genotypes vis-à-vis traits of interest, those contributing towards maximization of yield. The present investigation was, therefore, planned to assess the genetic parameters of variability for pod yield and related horticultural traits in order to identify the most promising edible pod pea genotypesMethods: Thirty six genotypes comprising of 29 F7 advanced breeding lines and nine lines from different institutes including three checks namely, ‘Arka Apoorva’, ‘Arka Sampoorna’ and ‘Mithi Phali’ were evaluated in randomized complete block design over three replications during winters 2016-2017 at C.S.K. Himachal Pradesh Krishi Vishvavidyalaya, Palampur for pod yield and related horticultural traits.Result: Sufficient genetic variability was observed for all morphological and yield contributing attributes. The magnitude of phenotypic (PCV) and genotypic (GCV) coefficients of variation were high for pod yield while branches per plant, internodal length, harvest duration and pods per plant showed high PCV and moderate GCV. High heritability along with high genetic advance was observed for internodal length, plant height, average pod weight and pod yield per plant indicating the importance of additive gene action. Pod yield per plant revealed positive correlation at both phenotypic and genotypic levels with pods per plant, average pod weight, pod length and pod breadth. Pods per plant and average pod weight at both phenotypic and genotypic levels had maximum positive direct and indirect effects to the total association of component traits suggesting the importance of these traits towards pod yield. 

scholarly journals Estimates of Genetic Variability in Selected Advanced Breeding Lines of Groundnut for Morphological, Yield and Its Contributing Traits under Imposed End-of-Season Drought Stress

2020 ◽  
pp. 108-118
Author(s):  
G. Chandrashekhara ◽  
Hasanali Nadaf ◽  
B. N. Harish Babu
Keyword(s):  
Genetic Variability ◽  
Block Design ◽  
Development Stage ◽  
Direct Selection ◽  
Control Block ◽  
Breeding Lines ◽  
Pod Development ◽  
Additive Gene ◽  
High Heritability ◽  
Pod Development Stage

Aim: To study genetic variability for morphological, yield and its contributing traits in forty groundnut genotypes. Study Design: Randomized complete block design with two replications. Place and Duration of Study: College of Horticulture, Hiriyur, University of Agricultural and Horticultural Sciences, Navile, Shivamogga, Karnataka, India during Rabi 2016-17. Methodology: Forty genotypes of groundnut were evaluated under irrigated and imposed end-season drought conditions. Crop was taken care as per recommended package of practices. Stress was imposed by withholding irrigation at pod development stage (@90DAS) for 20 days in drought block. However, control block was provided with regular irrigations. Observations on different morphological, yield and its related traits were recorded on randomly sampled five plants per genotype per replication in both stress-full and stress-free environments. The mean data was subjected to statistical analysis using Genstat 14.1 software. Results: The analysis of variance revealed that highly significant differences observed for all the traits even at p <0.01 level indicating the sufficient variability exist among the entries for the traits under study. High genotypic and phenotypic co-efficient of variation, high heritability coupled with high genetic advance over mean was observed for number pods per plant, immature pods per plant, pod yield per plant and hectare, harvest index, kernel yield per plant, fresh weight of seedlings and kernels per plant under moisture deficit condition. Conclusion: It’s a clear evidence for lesser influence of environment and predominance additive gene action in germplasm for these traits which offers opportunity for selection, unvaryingly direct selection for these traits could be effective for developing high yielding drought tolerant genotypes.

scholarly journals Genetic Variability, Character Association and Path Analysis in Boro Rice (Oryza sativa L.) Germplasm from Bangladesh

2019 ◽  
Vol 22 (1) ◽  
pp. 35-43
Author(s):  
MZ Islam ◽  
T Chakrabarty ◽  
N Akter ◽  
ESMH Rashid ◽  
M Khalequzzaman ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Coefficient Of Variation ◽  
Oryza Sativa L ◽  
Block Design ◽  
Crop Improvement ◽  
Leaf Length ◽  
Component Traits ◽  
High Heritability ◽  
Positive Significant Correlation ◽  
Boro Rice

The success of varietal development programmme largely depends on the nature and magnitude of genetic variability, heritability and characters association of the crop. The objective of the present study was to estimate the extent of genetic variability and relation between yield and related characters of rice. Forty Boro rice germplasm were evaluated in a randomised complete block design with three replications. Analysis of variance indicated significant differences among the genotypes for 14 quantitative characters. The presence of slightly higher phenotypic coefficient of variation than genotypic coefficient of variation indicated the negligible influence of environment on the expression of yield and its component traits. Leaf length, days to flowering, days to maturity and 1000 grain weight showed highly positive significant correlation present with yield hill-1. High heritability had been observed for yield contributing traits during the study, suggested that these traits would respond to selection owing to their high genetic variability and transmissibility. Therefore, a thorough understanding of the inheritance of traits, their heritability and relationship with other important characteristics is important for the choice of breeding and selection methods for crop improvement. Bangladesh Rice j. 2018, 22(1): 35-43

Variability, character association and path coefficient analysis of green pod yield and its related traits in pea (Pisum sativum L.)

2017 ◽  
Author(s):  
Keshav K. Gautam ◽  
M. M. Syamal ◽  
A. K. Singh ◽  
Nakul Gupta
Keyword(s):  
Plant Height ◽  
Association Studies ◽  
Path Coefficient ◽  
Pod Yield ◽  
Wide Range ◽  
Character Association ◽  
Additive Gene ◽  
High Heritability ◽  
Positive Direct ◽  
Number Of Branches

Genetic variability, character association and path coefficient studies were carried out for yield and yield contributing characters for twenty-four diverse genotype of pea. The results revealed a wide range of phenotypic variation, along with high heritability in pea. Highest pod yield per plant was recorded in VRP-229 followed by VRP-372 and VRP-305. The characters namely, plant height and weight of seeds per pod showed high magnitude, while number of pods per plant, number of branches per plant and pod yield per plant showed moderate magnitude for phenotypic and genotypic coefficient of variation. The heritability and genetic advance were high for days to first pod initiation, plant height and pod yield per plant indicating its additive gene action for their expression. Character association studies revealed that pod yield per plant exhibit positive and highly significant correlation with number of pods per plant, number of branches per plant and days to fifty percent flowering. The path coefficient studies also revealed that maximum positive direct effect was observed through number of pods per plant followed by days to first flowering, single pod weight and pod length towards yield indicated that these characters may be considered as the most reliable selection indices while making selection for high yielding genotypes.

scholarly journals Genetic variability and yield components of yard long bean (Vigna unguiculata var. sesquipedalis L.)

2021 ◽  
Vol 82 (3) ◽  
pp. 107-122
Author(s):  
Zakia Sultana ◽  
Nahid Ahmed ◽  
Mohammad Saiful Islam ◽  
Abdur Rahim
Keyword(s):  
Genetic Variability ◽  
Vigna Unguiculata ◽  
Block Design ◽  
Pod Yield ◽  
Randomized Complete Block Design ◽  
Days To Maturity ◽  
Cluster Distance ◽  
High Heritability ◽  
Positive Effect ◽  
Pod Number

Yard long bean (Vigna unguiculata var. sesquipedalis L.) is one of the important leguminous vegetables in Bangladesh. However, yield of this vegetable is much lower in Bangladesh compared to other yard long beangrowing countries. Therefore, it is crucial to improve the yield of this vegetable. In the present study, genetic variability, heritability, character association and genetic diversity were evaluated on randomized complete block design with three replications among seven-yard-long bean genotypes. The genotypes were significantly variable for the studied characters. High genotypic and phenotypic coefficient of variation was observed in number of pods per plant and pod yield per plant. Accordingly, high heritability together with high genetic advance in percent of mean was observed in number of pod per plant, pod diameter and hundred seed weight. The correlation studies revealed that pod yield per plant showed significant positive correlation with number of seed per pod, number of pods per plant while significantly negative correlation with days to marketable harvest at both genotypic and phenotypic level. Path analysis revealed days to first flowering, days to maturity, number of pods per plant, pod weight and number of seeds per pod had direct positive effect on pod yield per plant. The studied genotypes were clustered into 3 groups with highest of inter-cluster distance between cluster I and III while lowest between cluster II and III. The genotypes of cluster I exhibited higher mean performance while lower in cluster III for important traits including pod yield per plant.

Genetic Variability, Character Association and Path Analysis for Pod Yield and its Component Characters in Groundnut [Arachis hypogaea (L.)]

2021 ◽  
Author(s):  
Giradhari Lal Yadav ◽  
S.S. Rajput ◽  
D.K. Gothwal ◽  
M.L. Jakhar
Keyword(s):  
Genetic Variability ◽  
Block Design ◽  
Crop Improvement ◽  
Kernel Weight ◽  
Direct Selection ◽  
Oilseed Crop ◽  
Pod Yield ◽  
Biological Yield ◽  
Positive Direct ◽  
Kernel Yield

Background: Groundnut is an important oilseed crop in the India. The groundnut kernels serve as a rich source of edible oil (48-50%) and quality protein (25-28%). In crop improvement programme, availability of sufficient genetic variability is of immense importance. The knowledge of nature and magnitude of genetic variance controlling yield and yield components is a prerequisite for improvement of yield in any crop. Methods: The present investigation was undertaken to assess the genetic variability and character associations for pod yield and component characters in 45 genotypes of groundnut. The genotypes were raised in randomized complete block design with three replications during kharif 2019 at SKNAU, Jobner (Rajasthan). Result: The analysis of variance revealed significant differences among the genotypes for all the characters studied indicating presence of wide genetic variation for different characters. In the present investigation, high genetic advance coupled with high heritability and GCV was observed for biological yield per plant, 100-kernel weight, kernel yield per plant, dry pod yield per plant and pods per plant which indicated prevalence of additive gene action in their expression and these traits possessed high selective value. Kernel yield per plant, pods per plant and biological yield per plant exhibited significantly positive correlation with dry pod yield per plant both at genotypic and phenotypic levels, while shelling percentage at genotypic level only. Three characters viz., kernel yield per plant, pods per plant and biological yield per plant could be considered as direct selection parameters for yield improvement in groundnut because they exerted positive direct effect on dry pod yield per plant.

scholarly journals Genetic variability analysis for various yield attributing traits in rice genotypes

2017 ◽  
Vol 15 (1) ◽  
pp. 15-19
Author(s):  
MM Rashid ◽  
M Nuruzzaman ◽  
L Hassan ◽  
SN Begum
Keyword(s):  
Genetic Variability ◽  
Coefficient Of Variation ◽  
Block Design ◽  
Direct Selection ◽  
Genetic Advance ◽  
Randomized Complete Block Design ◽  
Additive Gene ◽  
High Heritability ◽  
Rice Genotypes ◽  
Selection For

An experiment was conducted using a randomized complete block design to estimate genetic variability of ten rice genotypes. Analysis of variance for yield and yield contributing traits showed significant (p<0.01) variation among the genotypes. Results of genetic analyses showed a higher phenotypic coefficient of variation compared to their corresponding genotypic coefficient of variation for all the traits measured, which indicates that the traits were influenced by environment. The magnitude of difference between phenotypic coefficient of variance (PCV) and genotypic coefficient of variance (GCV) was less for the traits indicating little influence of environment. The higher estimates of PCV and GCV were observed for number of filled grains panicle–1 (27.53; 26.84), number of unfilled grains panicle–1 (26.76;25.28) and plant height (23.14; 23.00) indicates possibility of genetic improvement through direct selection for these traits, while days to 50% flowering, days to maturity, panicle length, number of effective tillers plant–1, fertility (%), 1000 Seed weight and yield panicle–1 showed low PCV and GCV values indicating the need for creation of variability by hybridization or mutation followed by selection. High heritability values (>60%) along with high genetic advance and genetic advance as percentage of mean were found for all the traits indicating prevalence of additive gene action, which provides good scope for further improvement by selection.J. Bangladesh Agril. Univ. 15(1): 15-19, January 2017

scholarly journals Genetic variability, character associaton and path analysis in the tamarind (Tamarindus indica L.) population of Nallur tamarind grove

2014 ◽  
Vol 12 (1) ◽  
pp. 20-25 ◽  
Author(s):  
TR Singh ◽  
R Nandini
Keyword(s):  
Genetic Variability ◽  
Seed Weight ◽  
Genetic Improvement ◽  
Fruit Weight ◽  
Direct Effects ◽  
Seed Number ◽  
Additive Gene ◽  
High Heritability ◽  
Beak Length ◽  
Positive Direct

An experiment was carried out during 2009-2010 on one hundred tamarind genotypes of the Nallur tamarind grove, a few kilometres away from Bengaluru International Airport, to investigate the genetic variability, character association and their direct and indirect effects on the fruit weight of tamarind. The genotypic coefficient of variation was high for seed weight, fibre weight, seed number, beak length and fruit weight. In all cases, phenotypic variances were higher than the genotypic variance. Moderate to high heritability as well as genetic advances were estimated for pod length, pod width, seed weight, seed number, number of ridges, number of furrows, pulp weight and fruit weight indicated that these traits was under additive gene control and selection for genetic improvement for these traits would be effective. Correlation studies revealed the highest significant association of fruit weight with seed weight followed by pulp weight, epicarp weight and seed number at genotypic and phenotypic level. Positive direct effects were produced by pulp weight and seed weight, while number of ridges had negative direct effects. The information obtained from the current studies can be used as selection criteria for genetic improvement of tamarind genotypes under study. DOI: http://dx.doi.org/10.3329/sja.v12i1.21109 SAARC J. Agri., 12(1): 20-25 (2014)

scholarly journals Enhancement of Genetic Variability for Yield and Component Traits through Recombination followed by Induced Mutagenesis in Greengram [Vigna radiata (L.) Wilczek]

2020 ◽  
pp. 38-48
Author(s):  
Prasanta Kumar Majhi ◽  
Suma C. Mogali ◽  
L. S. Abhisheka
Keyword(s):  
Genetic Variability ◽  
Gamma Rays ◽  
Agricultural Research ◽  
Mutation Breeding ◽  
Research Station ◽  
Induced Mutation ◽  
Breeding Lines ◽  
Component Traits ◽  
High Heritability ◽  
Augmented Design

Aim: Greengram is a self-pollinated crop which show very less variability to develop improved varieties through only hybridization or induced mutation breeding. Therefore, we have taken a new pace to create more variability by combining both recombinations with induced mutation through gamma rays irradiation. For this purpose, the F2 seeds were irradiated with gamma rays at BARC, Mumbai and sown to grow the F2M1 generation and subsequently the superior mutant lines with high degree variability with high GCV and genetic advances were selected from F2M2 generation of the mutant population. Methodology: The present investigation was carried out during kharif-2017 and rabi-summer 2017-18 at the experimental plot, All India Coordinated Research Projects (AICRP) on MULLaRP, main Agricultural Research Station, College of Agriculture, University of Agricultural Sciences, Dharwad, Karnataka, India. The experiment was laid out in an augmented design. Results: The mutant progenies obtained from the crosses DGGV-2 × IPM-410-3 and DGGV-2 × SML-1815 in F2M2 generation have shown high PCV and GCV for the characters like plant height, number of clusters per plant and number of seeds per pod etc. when irradiated with 100 kR gamma rays. The mutant breeding lines derived from the crosses DGGV-7 × V-02-709 and DGGV-7 × V-02-802 with irradiation dose of 20 kR, have shown higher number of pods per cluster and higher number of pods per plant with high heritability. More variability was observed with higher dose (100 kR) of mutation even though it showed higher mortality rate. Conclusion: Irradiation of F2 progeny (DGGV-2 × SML-1815) with 100 kR has generated more genetic variability for seed yield per plant (10.8 g), when compared to the check DGGV-2 (4.7 g) and SML-1815 (9.8 g). So, priority should be given to those characters which are having high heritability coupled with high genetic advance as per cent mean to get better selection gains. The breeding lines which showed higher degree of variability can be utilized in the future breeding programme for development of high yielding genotypes.

scholarly journals Genetic Diversity for Yield and Its Component Traits in Chickpea (Cicer arietinum L.)

2021 ◽  
pp. 63-70
Author(s):  
Sanganamoni Srinivas ◽  
Lakmalla Vinay ◽  
Gaibriyal M. Lal
Keyword(s):  
Genetic Diversity ◽  
Present Experiment ◽  
Block Design ◽  
Genetic Advance ◽  
Mean Values ◽  
Cluster Distance ◽  
Component Traits ◽  
Additive Gene ◽  
High Heritability ◽  
Number Of Seeds

The present experiment was carried out to study the 40 chickpea genotypes to evaluate the Genetic diversity among the chickpea genotypes for yield and yield contributing traits and to identify genetically divergent parents for future hybridization. The present experiment was carried out during rabi 2019-2020 in Randomized complete block design with three replications at Sam Higginbottom university of agriculture technology and sciences, Prayagraj, Allahabad, U.P. The data was analyzed for 13 quantitative traits to study genetic variability, heritability, genetic advance, genetic advance as percent of the mean. The magnitude of genotypic coefficient of variation and phenotypic co-efficient recorded highest for a number of seeds for plant (33.31 and 34.24), high heritability associated with high genetic advance was recorded for a number of secondary branches for plant (97.11 and 59.98) suggesting that there was greater role of additive gene action in inheritance. The distribution of 40 genotypes into six clusters was by Tocher’s method at a random with the Maximum number of genotypes were grouped into cluster I which includes 29 genotypes. The highest intra-cluster distance was observed for cluster I (59.53) which comprised of 29 genotypes. The highest inter-cluster distance (407.97) was found between clusters II and VI. Genotypes (IPC-71, IPC 04-52, JG-31416, L-550, IPCK 09-165, ICC-244263, IPC 94-94 and IPC 06-11 to these clusters may be used as parents to create transgressive segregants. Cluster VI recorded maximum mean values for the number of primary branches per plant (3.67), number of secondary branches per plant (6.47), number of pods per plant (117.13), number of seeds per plant (155.53), and seed yield per plant (g) (25.94).

scholarly journals Analysis of genetic variability, heritability and genetic advance for yield and yield associated traits in some promising advanced lines of rice

2015 ◽  
Vol 26 (1) ◽  
pp. 26-31 ◽  
Author(s):  
MA Islam ◽  
SA Raffi ◽  
MA Hossain ◽  
AK Hasan
Keyword(s):  
Genetic Variability ◽  
Block Design ◽  
Grain Weight ◽  
Genetic Advance ◽  
Thousand Grain Weight ◽  
Randomized Complete Block Design ◽  
Days To Maturity ◽  
Additive Gene ◽  
High Heritability ◽  
Grain Width

A field experiment was conducted using twenty three rice genotypes including three check varieties during the period from June to December, 2013, at the Agronomy Field Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh to study genetic variability, heritability and genetic advance (GA) for yield and yield associated traits in rice. The experiment was laid down in a randomized complete block design with three replications. Plant height, number of filled grains per panicle, days to 50% flowering, thousand grain weight, grain width and grain yield showed relatively high genotypic co-efficient of variation (GCV) and phenotypic co-efficient of variation (PCV) estimates. The PCV were higher than GCV for all eight traits indicating that they all interacted with the environment to some extent. High heritability was obtained for grain width (88.54%), followed by days to 50% flowering (87.61%), thousand grain weight (81.96%), grain length (81.94%), days to maturity (81.81%) and number of filled grains per panicle (78.19%) which indicates high heritable portion of variation. High to medium estimates of heritability and genetic advance were obtained for number of filled grains per panicle (18.97), days to 50% flowering (11.89), days to maturity (12.16) indicating the roles of additive gene action and a good scope of selection using their phenotypic performance. Considering, all of these characters, filled gains per panicle and days to 50% flowering and maturity were important yield related traits and could be used for selection in rice breeding programs.Progressive Agriculture 26:26-31, 2015

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