scholarly journals Studies on Genetic Architecture Through Variability Parameters and Association Analysis in Cowpea [Vigna Unguiculata (L.) Walp.]

2021 ◽  
Vol 50 (3) ◽  
pp. 557-564
Author(s):  
Mayuri Sahu
Keyword(s):  
Association Analysis ◽  
Seed Weight ◽  
Genetic Architecture ◽  
Forage Yield ◽  
New Variety ◽  
High Heritability ◽  
Selection For ◽  
Positive Direct ◽  
100 Seed Weight ◽  
Additive Genes

Genetic architecture through variability parameters and association analysis for green forage yield and its characters in 78 germplasm lines including 3 checks (MFC-8-14, UPC-5286 and TSFC-12-15) was carried out during Rabi 2015-2016. All the fifteen studied characters exhibited existence of variability significantly. This indicated existence of sufficient variability among the genotypes for the mentioned characters and sufficient scope for development of new variety or genotypes. High genetic advances as percentage of mean were recorded for green forage yield (q/ha/day). High heritability estimates were recorded for 100-seed weight (g) and by green forage yield (q/ha). Correlation coefficient showed significant positive correlation with dependent character green forage yield with green forage yield per day at genotypic and phenotypic level. Maximum positive direct effect was obtained for green forage yield per day. These results indicate that green forage yield can be improved much better way by selection. Selection for these traits is likely to accumulate more additive genes leading to further improvement of performance of genotypes. Bangladesh J. Bot. 50(3): 557-564, 2021 (September)

scholarly journals Variability for agromorphological traits, genetic parameters, correlation and path coefficient analyses in Lentil (Lens culinaris Medik.)

2020 ◽  
pp. 1-7
Author(s):  
Shahida Akter ◽  
Israt Jahan ◽  
Md. Amir Hossain ◽  
Mohammad Anwar Hossain
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Lens Culinaris ◽  
Significant Negative Correlation ◽  
Path Coefficient ◽  
Genetic Advance ◽  
High Heritability ◽  
Positive Direct ◽  
100 Seed Weight ◽  
Number Of Seeds

Understanding phenotypic and genotypic variability of Bangladeshi lentil (Lens culinaris Medik.) in relation to exotic lentil is important in attempting to widen the genetic base of the germplasm in the country. An experiment was conducted using 30 diverse lentil genotypes to study the agromorphological and genetic variability, heritability, expected genetic advance and inter-relationship of ten yield attributing traits. The genotypes showed highly significant (p<0.01) variations for all of the studied traits. These characters also had higher phenotypic co-efficient of variation (PCV) than those of the corresponding genotypic co-efficient of variation (GCV). High heritability (ranged from 66-98%) was found among the traits. Seed yield plant-1 and number of seeds plant-1 showed high heritability accompanied with high genetic advance (as percent mean). Correlation coefficient studies revealed that number of pods plant-1, number of seeds plant-1 and 100-seed weight contributed to highly significant (p<0.01) positive correlation with seed yield plant-1. Days to 50% flowering and days to maturity were showed highly significant negative correlation with seed yield plant-1. Path analysis showed the highest positive direct effects of 100-seed weight followed by the number of secondary branches plant-1 and number of seeds plant-1 on seed yield plant-1. Days to 50% flowering via 100-seed weight contributed the highest negative indirect effect on seed yield plant-1. Maximum negative direct effect of plant height and days to 50% flowering was observed on seed yield plant-1. Results indicated that the exotic accessions could be effective for the improvement of the yield of lentil. 

scholarly journals Characterization of lentil (Lens culinaris M.) germplasm through phenotypic marker

2013 ◽  
Vol 10 (2) ◽  
pp. 197-204
Author(s):  
R Gupta ◽  
SN Begum ◽  
MM Islam ◽  
MS Alam
Keyword(s):  
Seed Weight ◽  
Lens Culinaris ◽  
Phenotypic Marker ◽  
Weight Yield ◽  
Selection Indices ◽  
Cluster Distance ◽  
Anova Table ◽  
High Heritability ◽  
Positive Direct ◽  
100 Seed Weight

An experiment was carried out to evaluate the performance of 22 lentil (Lens culinaris M.) genotypes for their yield and yield contributing characters at phenotypic level, relationship and diversity among the individuals and characterize the germplasm through phenotypic markers. ANOVA table revealed that significant variation was found among the genotypes for the characters plant height, days to maturity, number of primary branches plant-1, number of secondary branches plant-1, height of the lowest pod and 100-seed weight. Yield plant-1 was positively correlated with pods plant-1, seeds pod-1, seeds plant-1 and 100-seed weight. Considering yield plant-1 LM-123-7 was the best followed by LM-132-7, ICARDA-2348 and LM-13-1. Days to flowering, days of maturity and 100-seed weight showed high heritability. Path analysis revealed that pods plant-1 and 100-seed weight had positive direct effects on yield plant-1. The genotypes were grouped into five clusters based on Euclidean distance following Ward’s method and the highest intra-cluster distance was found in cluster IV and inter-cluster distance between the cluster IV and cluster V. Study of selection indices through discriminate functions observed that LM-123-7 ranked as the best followed by LM-132-7, LM-21-6, LM-24-3 and LM-14-2 and suggests that the highest scoring genotypes might be recommended for farmer’s cultivation for better yield. DOI: http://dx.doi.org/10.3329/jbau.v10i2.14682 J. Bangladesh Agril. Univ. 10(2): 197-204, 2012

Genetic Variability and Inter-relationships Among Grain Physical and Hydration Traits in Chickpea

2020 ◽  
Author(s):  
A.K. Srivastava ◽  
G.P. Dixit ◽  
Mohammad Nisar ◽  
N.P. Singh
Keyword(s):  
Genetic Variability ◽  
Negative Correlation ◽  
Seed Weight ◽  
Direct Selection ◽  
Seed Density ◽  
Quality Traits ◽  
Swelling Capacity ◽  
High Heritability ◽  
100 Seed Weight ◽  
Hydration Capacity

Background: Chickpea is the major pulse crop in India accounting for nearly 43% (10.13 MT) of the total pulse production and 80% of total pulse export during 2018-19. It is a good source of carbohydrates and protein and constitutes an important component of diet of largely vegetarian Indian masses. Hydration capacity and volume expansion (after soaking in water) are important cooking quality traits in chickpea, particularly in kabuli type which are mostly cooked as ‘whole grain’ without decortication. Limited information is available on these properties of chickpea. The current study is aimed at assessing the genetic variability and inter-relationships among grain physical and hydration traits in chickpea varieties.Methods: During the period 2017-2018, a total of fifty-nine chickpea (Cicer arietinum L.) varieties including 46 desi type and 13 kabuli type varieties were evaluated for their grain physical and hydration traits viz., 100-seed weight, seed density, hydration capacity, hydration index, swelling capacity and swelling index. Result: Significant differences were observed for 100 seed weight (Range: 11.00 to 51.50 g/100 seeds; Mean: 21.8 g/100 seeds), seed density (Range: 1.19 to 1.88; Mean: 1.37), hydration capacity (Range: 0.05 to 0.62; Mean: 0.24), hydration index (Range: 0.33 to 1.51; Mean: 1.10), swelling capacity (Range: 0.08 to 0.60; Mean: 0.25) and swelling index (Range: 0.62 to 2.33; Mean: 1.59). The magnitude of PCV was moderately higher than the corresponding GCV values for most of the traits indicating that the influence of the environment on the expression of these traits was not high. High heritability coupled with high genetic advance was recorded for 100-seed weight, hydration capacity and swelling capacity in both desi and kabuli varieties. These results indicate that high heritability of these traits is predominantly due to additive gene action and hence direct selection for these traits is expected to be effective. 100-seed weight showed significant positive correlations with hydration capacity and swelling capacity and negative correlation with seed density. Seed density showed negative correlation with hydration capacity, hydration index and swelling capacity. Hydration capacity was positively correlated with hydration index, swelling capacity and swelling index. These traits are important for consumers where whole grains are consumed after soaking and cooking. Existence of sufficient variability for these quality traits suggest the scope for breeding chickpea towards improved consumer preferred quality traits.

Relative potential of seed yield component traits as selection criteria in the segregating generations of a desi × kabuli cross of chickpea

2018 ◽  
Author(s):  
H. B. Santosh ◽  
C. Bharadwaj ◽  
V. S. Hegde ◽  
S. Savitha ◽  
C. Angadi ◽  
...  
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Selection Criteria ◽  
Early Generation ◽  
Branch Number ◽  
Plant Seed ◽  
Early Generation Selection ◽  
F2 Population ◽  
Selection For ◽  
100 Seed Weight

To assess the response to early generation selection in chickpea, a total of 150 F4 progenies derived from selection for total branches per plant, pods per plant, seeds per pod, seed yield per plant and 100-seed weight as independent selection criteria in F2 population of Pusa 362 (desi) × PG 0515 (kabuli) cross were evaluated along with their parents and unselected F2 bulk. The F2 population revealed high variability for all the yield components and transgressive segregation for all traits except 100-seed weight. Mean of the F4 families relative to the corresponding F2 plants was high, indicating effectiveness of early generation selection for all characters studied except branch number per plant. Significant correlated response for seed yield was also observed in F4. Based on realized response to selection as percentage of mean, realized heritability and realized generalized response values, we suggest utilization of pods per plant, seed yield per se and 100-seed weight as selection criteria in desi-kabuli introgression breeding for higher genetic gains.

Assessment of genetic variability and inter-character association in the germplasm of cowpea (Vigna Unguiculata L. Walp) in hot arid climate

2018 ◽  
Author(s):  
Om Vir Singh ◽  
Neelam Shekhawat ◽  
Kartar Singh ◽  
R. Gowthami
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Vigna Unguiculata ◽  
Seed Weight ◽  
Number Of Clusters ◽  
Positive Direct ◽  
Pod Length ◽  
100 Seed Weight ◽  
Number Of Branches

Studies on genetic variability, correlation and path coefficient analysis were carried out with 38 accessions of cowpea (Vigna unguiculata L. Walp.) evaluated in two environments i. e. kharif 2013 (E1) and kharif 2014 (E2) at Research field of NBPGR, Regional Station Jodhpur, India. Analysis of variance revealed significant differences among the genotypes for all the traits. Genotypic coefficient of variation was highest for number of clusters per plant followed by number of pods per plant in both the environments. High broad sense heritability along with high genetic advance for seed yield per plant, 100 seed weight, pod length, number of pods per plant, peduncle length, number of clusters per plant, number of branches per plant and plant height indicated the presence of additive gene effects for these traits in cowpea. In both the environments seed yield per plant was positively correlated with 100 seed weight, pod length, number of pods per plant, number of clusters per plant, number of branches per plant and plant height. The highest positive direct effect registered by number of branches per plant followed by number of clusters per plant in E1 environment and by number of branches per plant followed by plant height in E2 environment. The traits like 100 seed weight, plant height, number of pods per plant number of clusters per plant and number of branches per plant were identified as selection criteria for obtaining good parental lines in cowpea breeding programmes.

scholarly journals Genotypic Variability and Correlation Studies in Pod and Seed Characteristics ofPongamia pinnata(L.) Pierre in Orissa, India

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Deebe Prasad Sahoo ◽  
Gyana Ranjan Rout ◽  
Swarnalata Das ◽  
Subhashree Aparajita ◽  
A. K. Mahapatra
Keyword(s):  
Coefficient Of Variation ◽  
Seed Weight ◽  
Pongamia Pinnata ◽  
Effective Parameters ◽  
Seed Length ◽  
Additive Gene ◽  
High Heritability ◽  
Pod Length ◽  
Seed Characteristics ◽  
100 Seed Weight

Pongamia pinnata(L.) Pierre is a fast growing leguminous tree with high potential for oil seed production. Fifty-three candidate plus trees (CPTs) ofPongamia pinnatawere selected from different locations in Orissa, India, on the basis of their seed and pod characteristics to identify suitable seed source with high oil content for production of quality planting seedling for use in afforestation programs. All the CPTs showed significant variation among themselves in respect to their pod and seed characters. Phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) estimates were high for pod thickness, seed thickness, 100-pod weight, and 100-seed weight. High heritability values accompanied by high genetic advance for 100-seed weight (96.1%, 59.6) and 100-pod weight (90.9%, 37.3) indicated additive gene action. High estimates of genotypic correlations than the corresponding phenotypic correlations indicated the presence of strong inherent association between pod length and pod breadth; 100-pod weight, and pod thickness; 100-pod weight and seed length; 100-seed weight and 100-pod weight. Seed length, seed breadth, seed thickness, 100-pod weight and 100-seed weight had significant positive correlation with each other, and these characters should be considered as effective parameters to select CPTs for different agroforestry programs.

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 Genetic Variability, Correlation and Path Co-Efficient Analysis for Agronomic Traits in Chickpea (Cicer arietinum L.)

2010 ◽  
pp. 12-21 ◽  
Author(s):  
AI Saki ◽  
MA Zaman ◽  
M Tuhina-Khatun ◽  
MM Kamal ◽  
Hasina Begum
Keyword(s):  
Plant Height ◽  
Cicer Arietinum ◽  
Seed Yield ◽  
Seed Weight ◽  
Agronomic Traits ◽  
Dry Weight ◽  
High Heritability ◽  
Effect On Yield ◽  
Pod Length ◽  
100 Seed Weight

Forty genotypes of chickpea (Cicer arietinum L.) were studied in a field experiment conducted at the experimental field of BARI, Joydebpur, during the year 2004-2005. Significant genetic variations were observed among the genotypes for days to flower, plant height, number of branches per plant, number of pods per plant, 100-seed weight and seed yield per plant. The highest genotypic variability was observed in number of seeds per pod and seed yield, followed by number of pods per plant and branches per plant, whereas days to maturity showed the lowest genotypic co-efficient of variability. In all cases, phenotypic variances were higher than the genotypic ones. High heritability coupled with high genetic advance was observed for seed yield per plant, pods per plant, 100-seed weight and dry weight per plant, which indicates that selection could be effective for these traits. Considerable heritability was observed in pod length, seeds per pod and days to flowering. The results showed that seed yield per plant had positive and significant relation with branches per plant and pods per plant. Number of pods per plant were positively correlated with branches per plant but negatively correlated with plant height and days to first flowering. Weight of 100-seed had significant and positive correlation with days to first flowering, dry weight per plant and pod length but had negative correlation with pods per plant and seeds per pod. Days to first flowering, pod length, pods per plant, dry weight per plant had direct effect on yield. Therefore, days to first flowering, pods per plant, pod length, branches per plant and dry weight per plant are found the important characters which could be used in selection for yield.

scholarly journals Genetic Variability and Association Analysis of Oat (Avena sativa L.) Genotypes for Green Forage Yield and Other Components

2020 ◽  
pp. 133-141
Author(s):  
Mayuri Sahu ◽  
Ajay Tiwari
Keyword(s):  
Genetic Variability ◽  
Association Analysis ◽  
Avena Sativa ◽  
Dry Matter ◽  
Forage Yield ◽  
Direct Selection ◽  
Dry Matter Yield ◽  
Green Fodder ◽  
Fodder Yield ◽  
Positive Direct

Fourteen genotypes of fodder oat (Avena sativa L.) were evaluated to assess the genetic variability and association analysis during Rabi 2018-19. The character dry matter yield (q/ha/day) had the highest heritability. GCV and PCV estimate was recorded for the days to 50% flowering. Highest genetic advance was observed for green forage yield (q/ha) were as high as percentage of mean was observed for dry matter yield (q/ha/day). In the present experiment, it is evident for the result that day to 50% flowering has a highly significant negative correlation with green forage yield. The highest positive direct effect contributing to green forage yield (q/ha) was due to low crude protein (q/ha). However indirect effect on improvement in green fodder yield was exerted by most of the traits studied. A direct selection for all these traits will help in the improvement of green fodder yield. Green fodder yield was positively correlated with most of the traits studied except days to 50% flowering and plant height (cm). The study provided the opportunity to identify suitable genotypes to be used in a future breeding programme.

scholarly journals Genetic Evaluation and Screening of Diverse Wheat Genotypes for Spot Blotch Resistance

2021 ◽  
Author(s):  
Pritam Roy ◽  
Shouvik Gorai ◽  
Sudip Bhattacharya ◽  
Mousumi Murmu ◽  
Soham Hazra ◽  
...  
Keyword(s):  
Bipolaris Sorokiniana ◽  
Negative Influence ◽  
Spot Blotch ◽  
Path Coefficient ◽  
Progress Curve ◽  
Superior Genotype ◽  
High Heritability ◽  
Main Food Source ◽  
Positive Direct ◽  
Additive Genes

Abstract Production of wheat (Triticum aestivum L.) the main food source of South Asian countries including India faces several constraints including spot blotch caused by Bipolaris sorokiniana resulting in yield loss of 25–43 % depending upon the stage of infection. Fifty genotypes were evaluated for nine quantitative characters and area under disease progress curve (AUDPC) to identify superior genotype with spot blotch resistance. High heritability coupled with moderate to high genetic advance as percent of mean was registered for grains per spike, tillers per square meter, days to 50% heading and days to 50% flowering indicating the characters to be governed by additive genes. Correlation and path coefficient analysis favored days to 50% heading, days to 50% flowering and grains per spike since they had significant positive correlation with yield and simultaneous negative correlation with AUDPC and also conferring highest positive direct effect towards yield. Multiple linear regression (MLR) analysis indicated days to 50% heading to be most sensitive with negative influence on AUDPC. D2 analysis grouped the 50 genotypes into 10 clusters suggesting presence of diversity among the genotypes. Frequency distribution of AUDPC among the genotypes showed more or less normal distribution of the character. Low AUDPC score with acceptable level of yield performance were recorded for the genotypes 29882, 29610, 29473, 29940, 29477, 29748 and 30081. Identification of high yielding and less susceptible genotypes for spot blotch disease in the present investigation offered an opportunity for wheat improvement through selective breeding.

Sign in / Sign up

Export Citation Format

Share Document