scholarly journals Genetic variability and heritability estimates of morphological traits in F2 populations of rapeseed (Brassica carinata L.)

2020 ◽  
pp. 184-192
Keyword(s):  
Genetic Variability ◽  
Seed Yield ◽  
Morphological Traits ◽  
Block Design ◽  
Morphological Characters ◽  
Brassica Carinata ◽  
Genetic Advance ◽  
Parental Lines ◽  
The University ◽  
Pod Length

This study aimed to estimate genetic variability, heritability, and genetic advance for morphological characters in Brassica carinata L. A total of 22 genotypes comprised of six parental lines and their 16 bulk F2 populations were evaluated in a randomized complete block design with three replications at The University of Agriculture Peshawar during 2013-14. Data were recorded on days to 50% flowering, primary branches plant-1, main raceme length, pods on main raceme, pod length, number of seeds pod-1, 100-seed weight, and seed yield plant-1. Significant genetic differences were observed for all the traits studied. Among parental lines, C-93 performed better for primary branches plant-1 (11 branches), main raceme length (59.57 cm), pods on main raceme-1 (33 pods), and seeds pod-1 (15 seeds), C-95 for pod length (4.04 cm) and seed yield plant-1 (12.26 g). Among F2 populations, C-97 x C-88 performed better for main raceme length (73.20 cm), pods on main raceme (41 pods), C-88 x C-93 for pod length (4.95 cm), seeds pod-1 (18 seeds), and seed yield plant-1 (14.71 g). Moderate (30 < h2 ≤ 60) to high (h2 > 60) broad-sense heritability was observed for all morphological traits with maximum genetic advance, hence indicated that selection could be effective in the early generation for the improvements of these studied traits. Generally, cross combinations C-88 x C-93, C-97 x C-95, C-90 x C-93, and C-97 x C-88 performed better than their parental lines for morphological (primary branches plant-1, seeds pod-1, and seed yield plant-1) traits and could be exploited for varietal development in future brassica breeding programs.

Analysis of morphological characters inter-relationships in the germplasm of mungbean [Vigna radiate (L.) Wilezek] in the hot arid climate

2016 ◽  
Vol 39 (1) ◽  
Author(s):  
Om Vir ◽  
A. K. Singh
Keyword(s):  
Genetic Variability ◽  
Short Duration ◽  
Seed Yield ◽  
Block Design ◽  
Morphological Characters ◽  
Cluster Number ◽  
Number Of Clusters ◽  
Days To Maturity ◽  
Pod Number ◽  
Number Of Seeds

The 38 indigenous and exotic accessions of mungbean were evaluated in a randomized complete block design with three replicates during <italic>summer</italic> and <italic>kharif</italic> seasons of fragile climate of Rajasthan to estimate the presence of genetic variability, inter-characters associations, to identify a suitable short duration accession for cultivation during <italic>summer</italic> and to compare the relative performance of the genotypes in two seasons. The high degree of genetic variability was estimated during both seasons for seed yield per plant (g), 100-seed weight (g.), number of seeds per pod, number of pods per plant, number of pods per cluster, number of branches per plant, number of clusters per plant, plant height (cm.), number of days to 50% flowering and number of days to maturity. The moderate to high heritabilities coupled with moderate to high expected genetic advance were observed for all studied traits. Number of seeds per pod, number of pods per plant, number of pods per cluster, number of clusters per plant, days to 50% flowering and days to maturity had positive and significant correlations with seed yield per plant. The accession IC 39289-P<sub>4</sub> had been identified to be of short duration of 50 days. The accessions PLG 62, EC 520035, IC 305291, IC 39383, IC 39333, IC 39403 during <italic>summer</italic> season and EC 511379, PLM-14, IC 324021, EC 511371, IC 370497 during <italic>kharif</italic> seasonexhibited superiority in terms of seed yield over best check.

scholarly journals Genetic Variability and Path Analysis of Groundnut (Arachis hypogaea L.)

1970 ◽  
Vol 9 (1-2) ◽  
pp. 29-36 ◽  
Author(s):  
MA Zaman ◽  
M Tuhina-Khatun ◽  
MZ Ullah ◽  
M Moniruzzamn ◽  
KH Alam
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Agricultural Research ◽  
Block Design ◽  
Positive Association ◽  
Research Station ◽  
Genetic Advance ◽  
Days To Maturity ◽  
Positive Direct

An experiment was conducted at the Research farm of Regional Agricultural Research Station, BARI, Hathazari, Chittagong during Rabi season (December to April), 2009-2010 for estimation of genetic variability, genetic parameters and correlation coefficient among different yield components in a randomized block design with three replications. Thirty four groundnut genotypes were tested in the experiment. Highly significant variations were observed among the genotypes for all the characters studied. The highest genetic coefficient of variation was observed for karnel yield per hectare, followed by karnel yield per plant, branches per plant, immature and mature nuts per plant, 100 kernal weight and plant height. The highest heritability was observed in karnel yield per pant (95.08%), followed by karnel yield per hectare (94.38%), 100 kernal weight (87.01%), immature and mature nuts per plant (82.24%, 80.32%), branches per plant (79.54%) and 100 nut weight (78.98%), while high values of genetic advance were obtained in all the characters except days to maturity and days to 50% flowering. The seed yield per plant showed the highly significant and positive association with nut size, number of nuts per plant, karnel size and days to 50% flowering. The number of mature nuts per plant had high positive direct effect on seed yield per hectare followed by nut size, shelling percentage, days to 50% flowering and days to maturity. Therefore, branches per plant, plant height, nuts per plant, nut size, karnel size, days to 50% flowering, shelling percentage and days to maturity were identified to be the important characters which could be used in selection for yield. Keywords: Genetic variability; heritability; genetic advance; groundnut DOI: http://dx.doi.org/10.3329/agric.v9i1-2.9476 The Agriculturists 2011; 9(1&2): 29-36

Extent of Genetic Variability for Quantitative Traits in Indian Clusterbean Germplasm [Cyamopsis tetragonoloba (L.) Taub]

2021 ◽  
Author(s):  
Hina M. Makwana ◽  
P.R. Patel ◽  
D.G. Patel
Keyword(s):  
Genetic Variability ◽  
Seed Yield ◽  
Environmental Influence ◽  
Block Design ◽  
Cyamopsis Tetragonoloba ◽  
Genetic Advance ◽  
Plant Seed ◽  
Days To Flowering ◽  
Effective Selection ◽  
Number Of Branches

Background: Clusterbean [Cyamopsis tetragonoloba (L.) Taub.] (2n=2x=14) is an under exploited legume belonging to the family Fabaceae. Clusterbean is a versatile legume crop cultivated mostly as vegetable, for the extraction of guar gum, animal feed cover crop. Clusterbean is a drought tolerant, hardy, deep rooted annual legume. To assess the nature and magnitude for genetic variability, heritability and genetic advance for seed yield and component characters that are useful for an effective selection programme, the present study was under taken. Methods: A set of 40 clusterbean genotypes were evaluated during Kharif 2019 in in randomized complete block design with four replications at Agronomy Instructional Farm, SardarkrushinagarDantiwada Agricultural University, Sardarkrushinagar, Gujarat, India.Result: The highest estimates of genotypic coefficient of variation was observed for the number of branches per plant followed by seed yield per plant, days to flowering and number of clusters per plant indicating the presence of wide genetic variability for these characters. High estimates of heritability coupled with high genetic advance were observed for number of branches per plant, seed yield per plant and days to flowering indicating the presence of additive genes and less environmental influence on the characters and existence of sufficient heritable variation and wider scope for effective selection.

Moth bean [Vigna aconitifolia (Jacq.) Marechal] germplasm : Evaluation for genetic variability and inter characters relationship in hot arid climate of western Rajasthan, India

2015 ◽  
Vol 38 (6) ◽  
Author(s):  
Om Vir ◽  
A. K. Singh
Keyword(s):  
Genetic Variability ◽  
Plant Height ◽  
Seed Yield ◽  
Block Design ◽  
Arid Climate ◽  
Yellow Mosaic Virus ◽  
Moth Bean ◽  
Hot Arid Climate ◽  
Pod Length ◽  
Number Of Branches

The 44 accessions which were collected from Rajasthan, Gujarat and M.P. were evaluated in a randomized complete block design with three replicates during <italic>summer</italic> and <italic>kharif</italic> seasons in the hot arid climate of western Rajasthan to estimate the presence of genetic variability, inter-characters associations, to identify a suitable accession for cultivation during <italic>summer</italic> and to compare the relative performance of the genotypes in two seasons. The high degree of genetic variability was estimated during both seasons for seed yield per plant (g), plant height (cm.), pod length (cm.), peduncle length (cm.), number of branches per plant (cm), number of clusters per plant, number of cluster per branch and cluster length (cm.). The moderate to high heritabilities coupled with moderate expected genetic advance were observed for all studied traits. The plant height, pod length, number of branches per plant exhibited positive and significant association with seed yield whereas the incidence of leaf crinkle virus and yellow mosaic virus correlated negatively and significantly with seed yield. The accession IC 39786 exhibited absolute genetic resistance to crinkle virus disease in the field conditions. The accessions IC 36245, IC-36555, IC 36667, IC 36577 and IC 36604 exhibited yield advantage over best check during <italic>summer</italic> whereas accessions IC- 39675, IC-36607, IC-251908, IC 36245 and IC-36563 performed better than best check in terms of seed yield during <italic>kharif</italic> season.

Assessment of Genetic Variability, Diversity and Trait Correlation Analysis in Common Bean (Phaseolus vulgaris L.) Genotypes

2020 ◽  
Author(s):  
T. Basavaraja ◽  
L. Manjunatha ◽  
Rahul Chandora ◽  
S. Gurumurthy ◽  
N.P. Singh
Keyword(s):  
Genetic Variability ◽  
Seed Yield ◽  
Coefficient Of Variation ◽  
Agronomic Traits ◽  
Genetic Advance ◽  
High Heritability ◽  
Augmented Design ◽  
Pod Length ◽  
Trait Correlation ◽  
Number Of Branches

The present investigation was undertaken to study the genetic variability, diversity through cluster analysis and correlation among yield attributing traits. The experimental material is comprised of 63 diverse germplasm accessions including three check varieties were evaluated in augmented design during Rabi 2015-16 at IIPR, Kanpur. In this study, totally nine traits, namely, days to fifty per cent flowering (DF), days to maturity (DM), plant height (PH), number of branches per plant (NBP), number of pods per plant (NPP), pod length (PL), seeds per pod (SPP), 100 seeds wt (g) (HSW) and seed yield per plant (g) (SYP) were recorded. The results exhibited that the analysis of variance noticed significant differences among the genotypes for all characters studied. The genetic variability parameter showed that phenotypic coefficient of variation (PCV) were higher than those of genotypic coefficient of variation (GCV) for all the traits studied. Higher GCV coupled with heritability and genetic advance as % mean was recorded for PH, NPP, HSW and SYP. Likewise, high heritability coupled with high genetic advance as % mean was recorded in DF, PH, NPP, PL, HSW and SYP. Trait association study revealed that the seed yield per plant exhibited significant positive correlation with NBP, NPP, NSP and HSW. In the same pattern, Euclidian clustering analysis displays 63 genotypes were grouped to two major clusters. From this investigation, it was observed that all genotypes showed sufficient genetic variability for the traits studied. The genotype such as EC400414, EC400398, ET8415 and EC540173 were superior to check varieties in terms of morphological and other agronomic traits. These genotypes could be utilized in breeding programme for improvement of specific traits. 

Combining ability and heterosis studies across environments in linseed (Linum usitatissimum L.)

2011 ◽  
Vol 59 (1) ◽  
pp. 87-102 ◽  
Author(s):  
S. Sood ◽  
N. Kalia ◽  
S. Bhateria
Keyword(s):  
Seed Yield ◽  
Linum Usitatissimum ◽  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Linum Usitatissimum L ◽  
Randomized Block Design ◽  
Component Traits ◽  
Parental Lines ◽  
Fibre Yield

Combining ability and heterosis were calculated for fourteen lines of linseed in a line × tester mating design using twelve lines and two diverse testers in two different environments. The hybrids and parental lines were raised in a completely randomized block design with three replications to investigate seed and fibre yield and their component traits. Genetic variation was significant for most of the traits over environments. Combining ability studies revealed that the lines KL-221 and LCK-9826 were good general combiners for seed yield and most of its components, whereas LMH-62 and LC-2323 were good general combiners for yield components only. Moreover, KL-221 was also a good general combiner for fibre yield. Similarly, B-509 and Ariane were good general combiners for fibre yield and most of its components. Among the specific cross combinations, B-509 × Flak-1 was outstanding for seed yield per plant and B-509 × KL-187 and LC-2323 × LCK-9826 for fibre yield per plant, with high SCA effects. In general, the hybrids excelled their respective parents and the standard checks for most of the characters studied. Based on the comparison of mean performance, SCA effects and the extent of heterosis, the hybrids LC-2323 × LCK-9826 and B-509 × KL-221 appeared to be the most promising for both seed and fibre yield. Other promising combinations were LC-2323 × KL-210 and B-509 × Ariane for seed and fibre yield, respectively. The superiority of LC-2323, LCK-9826, KL-221, B-509 and Ariane as good general combiners was further confirmed by the involvement of these parents in the desirable cross combinations.

Assessment of Genetic Variability and Relationship between Different Quantitative Traits in Field Pea (Pisum sativum var. arvense) Germplasm

2021 ◽  
Author(s):  
Vijay Pratap ◽  
Vijay Sharma ◽  
Kamaluddin . ◽  
Gaurav Shukla
Keyword(s):  
Genetic Variability ◽  
Correlation Coefficient ◽  
Seed Yield ◽  
Harvest Index ◽  
Quantitative Traits ◽  
Field Pea ◽  
Path Coefficient ◽  
Genetic Advance ◽  
Path Coefficient Analysis ◽  
Biological Yield

Background: Assessment of genetic variability and inter-relationship between the characters can be used in the breeding programme to evolve new varieties with wide genetic diversity to maximize the yield potential in crop improvement programmes. Eighty-four field pea genotypes were evaluated in an augmented block design for thirteen quantitative traits to study variance components, heritability, genetic advance and inter-relationship between the yield and yield contributing traits. Methods: The extent of phenotypic and genotypic variation that exist in a character was calculated by the formula suggested by Burton and de Vane (1953). Heritability in broad sense and genetic advance as per cent of mean for each character was computed using the formula suggested by Hanson et al. (1956) and Johnson et al. (1955), respectively. Correlation coefficient was calculated by method suggested by Searle (1961) and path coefficient analysis done as per method of Wright (1921) and elaborated by Dewey and Lu (1959).Result: Significant differences observed among the genotypes tested for the yield characters indicated the presence of variability. High heritability coupled with high genetic advance as percent of mean was observed for the traits viz., plant height, effective pods plant-1, harvest index and seed yield plant-1 were governed by additive gene effects which will aid in effective selection. Correlation coefficient analysis revealed that seed yield plant-1 had highly significant and positive correlation with biological yield plant-1, effective pods plant-1, harvest index, seeds pods-1 and effective nodes plant-1, indicating that these traits are strongly associated with seed yield in field pea. Path coefficient analysis identified biological yield plant-1 followed by harvest index, seed pod-1, effective nodes plant-1, 100-seed weight and day to 50% flowering as highly desirable components with great direct effects on seed yield. 

scholarly journals Genetic Variability and Association Analysis of SomeQuantitative Characters in Sweet Corn

2013 ◽  
Vol 41 (2) ◽  
pp. 404
Author(s):  
Ozlem ALAN ◽  
Gulcan KINACI ◽  
Engin KINACI ◽  
Imren KUTLU ◽  
Zekiye BUDAK BASCİFTCİ ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Yield Components ◽  
Sweet Corn ◽  
Block Design ◽  
Sugar Content ◽  
Yield Potential ◽  
Genetic Advance ◽  
Solid Concentration ◽  
Kernel Quality ◽  
Soluble Solid

The objective of this study was to determine genetic variability, heritability, genetic advance, genotypic and phenotypic correlations of yield, yield components and kernel quality traits in seven sweet corn varieties. The present research was conducted during 2009 and 2010 growing season in Eskisehir, midwestern Turkey. The trials were set up in randomised complete block design with four replications. Analysis of variance observed highly significant differences for all the examined traits in both years. Sugar content, soluble solid concentration and number of leaves per plant revealed the highest genotypic and phenotypic coefficient of variation values. The high heritability estimates coupled with high genetic advance for sugar content, soluble solid concentration and starch content. Positive correlations were revealed between yield (husked, dehusked and fresh kernel) and yield components except plant height and 1000 seed weight. Negative correlations were found between kernel quality and yield and yield related traits. It can be concluded that, husked ear weight and dehusked ear weight could be used as the main criteria for yield improvement. It should be unfeasible to develop sweet corn varieties with satisfactory yield potential and improved kernel quality for the different sweet corn markets.

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