Study on genetic variability and character association in soybean [Glycine max (L.) Merrill] germplasm at vindhyan zone of Uttar Pradesh

2016 ◽  
Vol 35 (1) ◽  
Author(s):  
Nutan Prateek Ekka ◽  
Gabrial M. Lal
Keyword(s):  
Correlation Analysis ◽  
Grain Yield ◽  
Plant Height ◽  
Seed Yield ◽  
Coefficient Of Variation ◽  
Flowering Plant ◽  
Phenotypic Correlation ◽  
Days To Maturity ◽  
Seed Index ◽  
Pod Length

The present research was conducted to analysis of variance was significant for all characters days to 50% flowering, plant height (cm), branches per plant, clusters per plant, pods per plant, days to maturity, pod length (cm), seeds per pod, seed index (100 seed weight), seed yield per plant (g). Based on the mean performance among 20 genotypes, SL-778 (17.86) followed by PS-1447 (11.54) were found to the best genotypes for seed yield per plant indicating the presence of amount of variation for these characters. High heritability was observed for grain yield per plant (95%) and number of pods per plant (94%). Moderate values of genetic advance was observed for pods per plant (13.25) followed by days to maturity (12.69). Genotypic correlation analysis indicates that pods per plant (0.748**), seed index (0.665**), clusters per plant (0.489**), plant height (0.485**) and pod length (0.481**) showed positive significant association with grain yield per plant. Phenotypic correlation analysis indicates that pods per plant (0.723**), seed index (0.586**), plant height (0.456**), clusters per plant (0.430*) and pod length (0.348*) showed positive significant association with seed yield per plant. The results indicated of phenotypic coefficient of variation (PCV) were slightly higher than those of genotypic coefficient of variation (GCV) for all the traits studied. Slight differences indicated minimum environmental influence and consequently greater role of factors on the expression of the traits.

Combining ability, heterotic grouping and patterning of mungbean [Vigna radiata (L.) Wilczek] lines for high seed yield

2016 ◽  
Author(s):  
Chandra Mohan Singh ◽  
Madhuri Arya ◽  
S. B. Mishra ◽  
Anil Pandey
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Combining Ability ◽  
Diallel Analysis ◽  
Plant Seeds ◽  
Days To Maturity ◽  
Heterotic Grouping ◽  
Seed Index ◽  
Pod Length ◽  
High Seed Yield

An investigation was done to study the combining ability, heterotic grouping and patterning of mungbean lines using diallel analysis. The parents viz DMS-03-17-2 (for days to maturity, primary branches per plant, secondary branches per plant, seeds per pod, seed index, harvest index, seed yield per plant); IPM-2K-14-9 (for plant height); Meha (for primary branches per plant, secondary branches per plant, average intermodal length, pod length, seeds per pod & seed yield per plant); DMS-01-34-2 (for secondary branches per plant & seed index) and SML 1151 (for seed index) were found best general combiners, whereas crosses namely IPM-2K-14-9/ DMS 03-17-2 (for plant height), SML 1151/ DMS 01-34-2 (seed index) and SML 1151/ Meha, IPM-2K-14-9/ Meha, IPM-2K-14-9/ DMS 03-17-2 & Meha/ DMS 01-34-2 (for seed yield/ plant) were top specific combiners and heterotic for respective traits. The pattern of heterotic grouping based on seed size and yield indicated that, heterosis was not only dependent upon the genetic distance between clusters; diversity within group was also showing remarkable heterosis.

scholarly journals Evaluation of agronomic traits and assessment of genetic variability in some popular wheat genotypes cultivated in Saudi Arabia

2019 ◽  
pp. 847-856 ◽  
Author(s):  
Soleman M. Al-Otayk
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Plant Height ◽  
Bread Wheat ◽  
Coefficient Of Variation ◽  
Agronomic Traits ◽  
Kernel Weight ◽  
Wheat Genotypes ◽  
Days To Heading ◽  
Days To Maturity

The present study was carried out to evaluate agronomic traits and assessment of genetic variability of some wheat genotypes at Qassim region, Saudi Arabia', during 2010/11 and2011/12 seasons. Fourteen wheat genotypes including five bread wheat and nine durum wheat genotypes were evaluated in randomized complete block design with three replications. The genotypes were evaluated for ten different yield contributing characters viz., days to heading, days to maturity, grain filling period, grain filling rate, plant height, number of spikes m-2, kernels spike-1, 1000-kernel weight, grain yield and straw yield. The combined analysis of variance indicated the presence of significant differences between years for most characters. The genotypes exhibited significant variation for all the characters studied indicating considerable amount of variation among genotypes for each character. Maximum coefficient of variation was observed for number of spikes m-2 (17%), while minimum value was found for days to maturity. Four genotypes produced maximum grain yield and statistically similar, out of them two bread wheat genotypes (AC-3 and SD12) and the other two were durum wheat (AC-5 and BS-1). The genotypes AC-3, AC-5 and BS-1 had higher grain yield and stable in performance across seasons. The estimation of phenotypic coefficient of variation in all the traits studied was greater than those of the genotypic coefficient of variation. High heritability estimates (> 0.5) were observed for days to heading, days to maturity, and plant height, while the other characters recorded low to moderate heritability. The high GA % for plant height and days to heading (day) was accompanied by high heritability estimates, which indicated that heritability is mainly due to genetic variance. Comparatively high expected genetic advances were observed for grain yield components such as number of kernels spike-1 and 1000-kernel weight. Grain yield had the low heritability estimate with a relatively intermediate value for expected genetic advance. The results of principle component analysis (PCA) indicated that the superior durum wheat genotypes for grain yield in the two seasons (AC-5 and BS-1) are clustered in group II (Fig. 2). Also, the superior two bread wheat genotypes (AC-3 and SD12) were in group I. Therefore, it could be future breeding program to develop new high yielding genotypes in bread and durum wheat.

scholarly journals ESTIMATING VARIABILITY, HERITABILITY, AND GENETIC ADVANCE OF RICE GENOTYPES IN MID-HILLS OF NEPAL

2021 ◽  
Vol 22 (2) ◽  
pp. 92
Author(s):  
Sashi Lamichhane ◽  
Nav Raj Adhikari ◽  
Bishwas K.C. ◽  
Sapana Thapa
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Grain Weight ◽  
Flowering Plant ◽  
Genetic Advance ◽  
Panicle Length ◽  
Breeding Programs ◽  
Significant Difference ◽  
Improvement Programs

<p>Rice is an essential staple food in Nepal but researches and varietal improvement programs are rarely carried out due to inadequate variability study. The field study was carried to diagnose the influence of genetic and environmental factors on yield traits to aid future rice breeding programs. Twelve genotypes were arranged in randomized complete block design with three replications from July to November 2019 at the research field of the Institute of Agriculture and Animal Science, Tribhuvan University, in the hilly area of Nepal. Analysis of variance showed significant difference for days to 50% booting, days to 50% flowering, plant height, panicle length, flag leaf area, filled grains per panicle, unfilled grains per panicle, fertility percentage, effective tillers m<sup>-2</sup>, straw yield, grain yield, 1000-grain weight, and harvesting index indicating the presence of variation in genotypes. LPN BR-1615 was the most promising genotype in grain yield. The values of Phenotypic Coefficient of Variation (PCV) were higher than Genotypic Coefficient of Variation (GCV) for each trait and low difference between them was found for days to 50% booting, days to 50% flowering, plant height, panicle length, grain yield, thousand-grain weight, fertility percentage, and harvesting index. Plant height, effective tillers m<sup>-2</sup>, and grain yield showed high heritability (i.e. 93.2%, 60.5% and 92.6%, respectively) and higher genetic advance as percentage of mean (i.e. 46.5, 34.6 and 50.1, respectively) . Thus, the experiment revealed that selections favoring plant height, effective tillers m<sup>-2</sup>, and grain yield would help in effective breeding programs of rice in future.</p>

Estimation of Genetic Variability, Correlation and Path analysis in short duration Rice Genotypes of Manipur

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
SUDHIR KUMAR ◽  
S. BHUVANESWARI ◽  
E. LAMALAKSHMI DEVI ◽  
S. K. SHARMA ◽  
M. A. ANSARI ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Short Duration ◽  
Coefficient Of Variation ◽  
Positive Association ◽  
Grain Weight ◽  
Days To Maturity ◽  
Spikelets Per Panicle ◽  
Correlation And Path Analysis ◽  
1000 Grain Weight

High significant variations were observed for all the traits studied under present investigation. Considering parameters, high phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were observed for the number of effective tillers per plant, grain yield per plant, plant height followed by days to 50% flowering. Heritability in broad sense was higher in all of the characters studied under present investigation. High heritability coupled with high genetic advance as percent of mean was observed in plant height, days to 50% flowering, days to maturity, number of spikelets per panicle and number of grains per panicle, indicated that these characters under additive gene control and selection for improvement might be effective. Both at the phenotypic and genotypic level, grain yield per plant had significant and positive association with plant height, panicle length,number of filled grains per panicle and number of spikelets per panicle but had significant negative association with number of effective tillers per plant and 1000- grain weight. Number of spikelets per panicle had the maximum positive and direct effect followed by days to maturity, plant height, spikelet fertility and 1000- grain weight. Based on mean performance and various genetic parameters attributes, advance line namely, MC-34-1-10-6-1-26 was observed to be promising because it is of short duration, and yielded significantly higher than the short duration check RCM-8. Promising culture would be recommended for double cropping in the valley region of the state.

Phenotypic diversity analysis and performance of elite lines of Brassica napus L.

2021 ◽  
Vol 50 (1) ◽  
pp. 1-6
Author(s):  
Muhammad Sajjad Iqbal ◽  
Muhammad Akbar
Keyword(s):  
Brassica Napus ◽  
Plant Height ◽  
Seed Yield ◽  
Large Scale ◽  
Phenotypic Diversity ◽  
Phenotypic Traits ◽  
Brassica Napus L ◽  
Days To Maturity ◽  
Pakistani Origin ◽  
Pod Length

Thirteen elite lines of Brassica napus L. were tested. Nine phenotypic traits viz., days to 50% flowering, days to maturity, plant height, branches, pods, pod length, pod width, pod weight and seed yield were studied. ANOVA revealed significant results for all the traits while summary statistics exhibited high level of genetic variability in days to 50% flowering, days to maturity, plant height and number of pods. On the other hand, number of branches, pod length, pod width, pod weight and seed yield need more attention for improvement. Coefficient of correlation revealed significant combinations among various traits which could be utilized directly. Cluster analysis based on linkage distances described grouping pattern into three clusters for dissimilarities. Elite line 24866 of Pakistani origin placed in separate cluster prominently that is due to best performance for maximum traits, hence recommended for farmers’ field large scale cultivation.

scholarly journals Genetic Diversity, Correlations and Path Coefficient Analysis among the F5 Populations of Brassica Species

2021 ◽  
pp. 20-31
Author(s):  
Sujon Kumar ◽  
Barkat Ali ◽  
A. B. M. Khaldun ◽  
Shams Shaila Islam ◽  
M. Shalim Uddin ◽  
...  
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Coefficient Of Variation ◽  
Block Design ◽  
Brassica Species ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Estimate Heritability ◽  
Positive Direct ◽  
Pod Length

The present study was carried out to estimate heritability, genetic variability, correlation and genetic advance among F5 populations of ten genotypes in Brassica species. This study was executed following randomized complete block design (RCBD) with three replications during November 2017 to February 2018 at the experimental field of College of Agricultural Sciences, International University of Business Agriculture and Technology, Dhaka, Bangladesh. Aim of the research was to evaluate and select the best segregating genotypes for the yield and yield contributing traits towards variety development programs. Analysis of variance revealed that the genotypes were significantly different for all the characters studied. The relative phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all the traits studied. The high GCV value was observed for the days to 50% flowering (FF), plant height (PH), primary branches per plant (PBP), pod per plant (PP) and seed yield per plant (SYP) that indicated a high broad-sense heritability. A significant positive correlation with seed yield per plant was found in days to 50% flowering (0.578**), the plant height, (0.787**), pod length (PL) (0.406*), seeds per plant (SP) (0.369*), pod per plant (0.697**) and hundred seeds weight (HSW) (0.500**), but significantly negative correlation found in primary branches per plant (-0.046*). The results of path coefficient analysis revealed that days to 50% flowering (0.287), plant height (0.407), pod length  (0.919), seeds per plant (0.033), pod per plant (0.035) and hundred seeds weight (0.795) had a positive direct impact on seed yield per plant and thus it was indicated that these traits could be exploited for the enhancement of yield performance of Brassica species. This study showed that based on the agronomic performance execution, genotypes G2, G5, G6 and G8 might be proposed for future hybridization programs in Bangladesh followed by variety development activities.

scholarly journals Genetic variability, character association and path analysis in maize (Zea mays L.)

2016 ◽  
Vol 41 (1) ◽  
pp. 173-182 ◽  
Author(s):  
S Begum ◽  
A Ahmed ◽  
SH Omy ◽  
MM Rohman ◽  
M Amiruzzaman
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Phenotypic Correlation ◽  
Path Coefficient ◽  
Character Association ◽  
High Heritability ◽  
Ear Height ◽  
Positive Direct ◽  
Almost All

Twenty-two maize hybrids were evaluated to find out their variability, character association and path coefficient of grain yield and its component characters. Significant differences were found among the genotypes for the characters studied. Ear length and grain yield (t/ha) had moderate genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV), but the had the low environmental co-efficient of variation (ECV). The heritability for all the characters was high. The characters viz. plant height, ear height and 1000-grain weight, showed high heritability along with high genetic advance. Ear length, ear diameter and kernel per row had highly significant positive correlation with grain yield. However, the deviations between genotypic and phenotypic correlation and magnitude of environmental correlation suggested considerable influence of growing environment in expressing almost all the characters. Path coefficient analysis revealed that plant height (0.659), ear length (0.934) and kernel-rows per ear (0.715) had highly significant positive direct effect on grain yield suggesting their importance during selection. Simultaneous restricted selection should be done for number of kernel rows per ear.Bangladesh J. Agril. Res. 41(1): 173-182, March 2016

scholarly journals Analysis of Genetic Parameters on Ethiopian Mustard (Brassica Carinata A. Braun) Genotypes in Northwestern Ethiopia

2014 ◽  
Vol 69 (1) ◽  
pp. 25-34
Author(s):  
Tesfaye Walle ◽  
Adugna Wakjira ◽  
Tewodros Mulualem
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Coefficient Of Variation ◽  
Crop Improvement ◽  
Grain Filling ◽  
Flowering Plant ◽  
Northern Ethiopia ◽  
Genetic Advance ◽  
Ethiopian Mustard ◽  
Grain Filling Period

ABSTRACT This study was carried out with the objective to estimate the genotypic variability and other yield related traits of Ethiopian mustard in North West Ethiopia. A total of 36 genotypes of Ethiopian mustard were considered for this study. Analysis of variance was computed to contrast the variability within the collected genotypes based on yield and other yield related traits. The results revealed highly significant values(p<0.01) for days to maturity, grain filling period, number of pod per plot, secondary branches per plant, harvest index, seed yield per plot, seed yield per hectare and oil content. Significant differences (p<0.05) were noted for days to flowering, plant height, primary branch per plant, biomass per plot, oil yield per plot differences among the genotypes. Genotypic coefficient of variation (GCV %) was lower than phenotypic coefficient of variation (PCV %) for all the traits studied. High genetic advance with heritability was observed in the following characters; plant height, biomass of the plant, number of secondary branch per plant and grain filling period. There are variations in the extent of genetic variability, heritability and genetic advance of traits which can facilitate selection for further improvement of important traits of Ethiopian mustard. Therefore, it can be concluded that the variability within Ethiopian mustard genotypes collected from different areas of northern Ethiopia is high and vital for better crop improvement.

Character associations between seed yield and its components traits in cowpea [Vigna unguiculata (L.) Walp.]

2015 ◽  
Vol 49 (6) ◽  
Author(s):  
H. K. Meena ◽  
K. Ram Krishna ◽  
Bhuri Singh
Keyword(s):  
Seed Yield ◽  
Seed Weight ◽  
Flowering Plant ◽  
Direct Selection ◽  
Path Coefficient ◽  
Days To Maturity ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Pod Length ◽  
100 Seed Weight

A field experiment was conducted during <italic>kharif</italic> season 2013 to estimate the correlations and path coefficients for ten quantitative characters among 72 cowpea germplasm. Seed yield per plant had positive significant correlation with days to 50% flowering, plant height, primary branches per plant, pods per plant, pod length, seeds per pod and 100-seed weight at both genotypic and phenotypic levels. Path coefficient analysis revealed that primary branches per plant and 100-seed weight had high direct positive effect on seed yield per plant at both genotypic and phenotypic levels. Pod length, days to maturity, 100 seed weight and pod wall proportion had high positive direct effects on seed yield per plant at only genotypic level. Correlation and path analysis indicated that for increasing seed yield in cowpea direct selection should be carried out for higher values of primary branches per plant, pods length, days to maturity and 100 seed weight.

scholarly journals Evaluation of the Agronomic Traits of 80 Accessions of Proso Millet (Panicum miliaceum L.) under Mediterranean Pedoclimatic Conditions

Agriculture ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 578
Author(s):  
Alessandro Calamai ◽  
Alberto Masoni ◽  
Lorenzo Marini ◽  
Matteo Dell’acqua ◽  
Paola Ganugi ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Seed Yield ◽  
World Population ◽  
Panicum Miliaceum ◽  
Continuous Increase ◽  
Proso Millet ◽  
Wide Range ◽  
Dry Biomass ◽  
Days To Maturity

The continuous increase in the world population and the associated food demands in the wake of climate change are pushing for the development and cultivation of climate-resilient crops that are able to efficiently use natural resources. Proso millet (Panicum miliaceum L.) might be a promising candidate crop thanks to its heat stress resistance and its limited water demand. To date, one of the most important strategies to increase grain yield and to improve other agronomic important traits is through an efficient breeding program based on a wide genetic variability of parental germplasm. In this study, we evaluated the agronomical traits of a world collection of 80 P. miliaceum accessions. The entire collection was evaluated over a 2 year field experiment under Mediterranean pedoclimatic conditions, which exhibited a wide range of variability for plant height (25–111 cm), grain yield (842–3125 kg ha−1), total dry biomass (2767–10,627 kg ha−1), harvest index (HI; 0.25–0.35), Growing Degree Days (GDDs; 581–899), and days to maturity (80–111 d). A non-parametric multivariate analysis of variance (Np-MANOVA) analysis indicated that GDDs to flowering, grain yield, total dry biomass, days to maturity, plant height, and seed yield per plant were useful parameters to differentiate the germplasm accessions. High heritability (>0.60) was observed in both years for plant height, leaf number, basal tiller, seed yield per plant, 100-seed weight, GDDs to flowering, and days to maturity. Grain yield, total dry biomass, and HI reported moderate heritability (0.30–0.60). The findings reported in the present study may provide valuable information that could support researchers in breeding programs to develop high grain-yielding accessions.

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