Studies on genetic variability, correlation and path analysis inpearl millet (Pennisetum glaucum L.) germplasm lines

2017 ◽  
Author(s):  
A. M. Talawar ◽  
G. Girish ◽  
A. S. Channabasavanna ◽  
M.S. Kitturmath
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Path Analysis ◽  
Pennisetum Glaucum ◽  
Panicle Length ◽  
Plant Seed ◽  
Quantitative Characters ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Positive Significant Correlation

The 52 germplasm lines of pearl millet (Pennisetum glaucum L.) were evaluated for eight quantitative characters with a view to study the genetic variability, correlation and path analysis. The High values of GCV, PCV and heritability estimates coupled with maximum genetic advance over mean were obtained for the characters like productive tillers per plant, grain yield per plant, seed weight, seed yield per ear head and panicle length traits. The results of correlation and path analysis revealed that grain yield per plant exhibited positive significant correlation with panicle length and panicle girth. The plant height, panicle girth and panicle length traits contributed the highest positive direct effect on grain yield.

scholarly journals Some Genetic Parameters and Path Coefficient of Three-Way Crosses in Maize

2021 ◽  
Vol 910 (1) ◽  
pp. 012099
Author(s):  
Banan Hassan Hadi ◽  
Wajeeha Abed Hassan ◽  
Majid S.H. Hamdalla
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Leaf Area ◽  
Correlation Coefficients ◽  
Direct Selection ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Positive Significant Correlation

Abstract Correlation and path coefficient analysis were worked out for ten morphological traits in 30 three-way crosses of maize. Phenotypic and genotypic correlation analysis indicated that ear length; row numbers per ear, grain numbers per row, leaf area and leaves numbers had a positive significant correlation with grain yield per plant. Further partitioning of correlation coefficients into direct and indirect effects showed that traits days to silking, row numbers per row and leaves numbers had a positive direct effect on grain yield per plant. The traits ear length, grain numbers per row and leaf area had a maximum total effect on grain yield. Furthermore, PCA analysis has gave interested results and it supported the results of correlation and path analysis. The correlation and path analysis obviously indicated that direct selection based on these attributes may be useful in raising grain yield in maize.

scholarly journals Correlation and path analysis of yield and its components and plant traits in wheat

2004 ◽  
Vol 34 (6) ◽  
pp. 1701-1708 ◽  
Author(s):  
Lauro Akio Okuyama ◽  
Luiz Carlos Federizzi ◽  
José Fernandes Barbosa Neto
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Plant Traits ◽  
Flag Leaf ◽  
Phenotypic Correlation ◽  
Path Coefficient ◽  
Above Ground Biomass ◽  
Ground Biomass ◽  
Correlation And Path Analysis ◽  
Positive Direct

This study was aimed to characterize yield components and plant traits related to grain yield. Correlation and path analysis were carried out in wheat genotypes grown under irrigated and non-irrigated field conditions. In the path coefficient analysis, grain yield represented the dependent variable and the number of spikes m-2, number of grains spike-1, kernel weight, days to anthesis, above-ground biomass m-2 and plant height were the independent ones. In both years, periods without rain occurred from early milk to grain ripening and from flag leaf sheath opening to grain ripening for first and second sowing dates, respectively. Character associations were similar in both water regimes. Grain yield showed positive phenotypic correlation with above-ground biomass, number of spikes m-2 and number of grains per spike. Path analysis revealed positive direct effect and moderate correlation of number of spike m-2 and number of grains per spike with grain yield. These results indicated that the number of spikes m-2 and the number of grains per spike followed by the above-ground biomass were the traits related to higher grain yield, under irrigated and late season water stress conditions.

scholarly journals Correlations and path analysis for quantitative characteristics in semi-prostrate cowpea bean genotypes (Vigna unguiculata (L.) Walp)

2020 ◽  
Vol 14 (2) ◽  
pp. 216-223
Author(s):  
Hermes Araméndiz-Tatis ◽  
Miguel Espitia-Camacho ◽  
Carlos Cardona-Ayala
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Low Income ◽  
Positive Impact ◽  
Caribbean Region ◽  
Environment Interaction ◽  
Cowpea Cultivars ◽  
Quantitative Characters ◽  
Negative Effect ◽  
Positive Direct

The cowpea is the most important legume in the Colombian Caribbean, due to its positive impact on the food and nutritional security of low-income rural families. It is cultivated by small producers, but its yields per hectare do not exceed 600 kg, due to the use of obsolete cultivars. The objective of the research was to estimate the correlations between seven quantitative characters and the path analysis between grain yield and six quantitative characters, with the results of the evaluation of 10 genotypes of semi-prostrate growth habit, high grain yield, grown in eight environments of the humid and dry tropics of the Colombian Caribbean region, under the randomized complete blocks design, with four repetitions. Significant differences between environments, genotypes and genotype x environment interaction were detected. Genotypic correlations were of greater magnitude than phenotypic, highlighting the correlation between grain width (GW) and grain yield (GY), rP = 0.69 *, rG = 0.78 *, also between the weight of 100 seeds (100SW) and GW, rP = 0.97 **, rG = 0.99 **. The characters GW and number of pods per plant (NPP) had positive direct effects on the GY, with an indirect negative effect of NPP by way of GW, while the height of the first pod (HFP), the number of seeds per pod (NSP) and the 100SW directly and negatively influenced the GY of the 10 semi-prostrate cowpea cultivars.

scholarly journals GENETIC VARIABILITY, CHARACTER ASSOCIATION AND PATH ANALYSIS OF YIELD AND ITS COMPONENT TRAITS IN MAIZE (Zea mays L.)

2016 ◽  
Vol 29 (1) ◽  
pp. 21-30
Author(s):  
M. N. Huda ◽  
M. S. Hossain ◽  
M. Sonom
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Path Analysis ◽  
Plant Height ◽  
Direct Effect ◽  
Coefficient Of Variation ◽  
Block Design ◽  
Male Flower ◽  
Maize Genotypes ◽  
Positive Direct

The experiment was conducted in the experimental area of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during March to June, 2014 to study the genetic variability, correlation and path co-efficient analysis for yield and yield contributing characters of maize. In this experiment 25 maize genotypes were used as experimental materials. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Mean performance, variability, correlation matrix and path analysis on different yield contributing characters and yield of maize genotypes were estimated. The highest grain yield/plant (272.21 g) was recorded in the genotype of BARI Hybrid Maize-6, whereas the lowest grain yield/plant (180.40 g) from the genotype of NZ-003. Phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all the yield contributing traits. In correlation study, significant positive association was recorded for grain yield/plant of maize genotypes with plant height (0.235), tassel height (0.359), number of grains/cob (0.854), cob length (0.390), cob diameter (0.313) and weight of 1000-grains (0.689). Path analysis revealed that days to initiation of male flower had positive direct effect (0.132), days to initiation of female flower had negative direct effect (-0.254), days to maturity had positive direct effect (0.178), plant height had positive direct effect (0.314), tassel height had positive direct effect (0.234), ear length had positive direct effect (0.197), number of grains/cob had negative direct effect (-0.095), cob length had positive direct effect (0.167), cob diameter had positive direct effect (0.168) and that weight of 1000-grains had positive direct effect (0.217) on yield / plant.

scholarly journals Genetic Variability, Correlation and Path Analysis Studies in Rabi Sorghum (Sorghum bicolour (L.) Moench) Genotypes

2021 ◽  
Vol 10 (10) ◽  
pp. 185-192
Author(s):  
M. S. Nikam G. C. Shinde ◽  
V. R. Awari M. S. Shinde ◽  
N. S. Kute
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Harvest Index ◽  
Panicle Length ◽  
Green Leaves ◽  
Days To Maturity ◽  
Fodder Yield ◽  
Correlation And Path Analysis ◽  
1000 Grain Weight ◽  
Panicle Weight

The forty four promising sorghum genotypes were evaluated for variability, correlation and path analysis for yield and yield contributing characters, at Sorghum improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri during Rabi-2019-20. High estimates of PCV and GCV were observed for traits no. of green leaves per plant at harvest, panicle length (cm), panicle width (cm), panicle weight (g), harvest index and grain yield per plant (g).High estimates of heritability along with high genetic advance were recorded for plant height (cm), no. of green leaves per plant at harvest, panicle length (cm), panicle width (cm), panicle weight (g), 1000 grain weight (g), dry fodder yield per plant (g), harvest index and grain yield per plant (g).Correlation studies revealed a positive and significant association of grain yield with plant height (cm), number of internodes per plant, number of green leaves per plant at harvest, panicle length (cm), panicle width (cm), panicle weight (g), 1000 grain weight (g), dry fodder yield per plant (g) and harvest index at both genotypic and phenotypic level. Harvest index, panicle weight, dry fodder yield per plant, days to maturity and no. of internodes per plant recorded high magnitudes of direct effects accompanied by highly significant correlation with the grain yield at genotypic level, indicating true and perfect relationship between them. Thus suggesting that selection for these traits viz., harvest index, panicle weight, dry fodder yield per plant, days to maturity and no. of internodes per plant will be highly rewarding for improving the grain yield per plant.

scholarly journals Studies on genetic variability, correlation and path analysis in lettuce (Lactuca sativa L.) under protected conditions

2016 ◽  
Vol 8 (4) ◽  
pp. 1924-1930 ◽  
Author(s):  
Manisha Thakur ◽  
Ramesh Kumar ◽  
Sandeep Kumar
Keyword(s):  
Seed Germination ◽  
Genetic Variability ◽  
Path Analysis ◽  
Direct Effect ◽  
Western Himalayas ◽  
Sclerotinia Rot ◽  
Head Weight ◽  
Gray Mould ◽  
Correlation And Path Analysis ◽  
Positive Direct

Twenty-eight genotypes of lettuce including check cultivars viz., Simpson Black Seeded and Great Lakes were grown in a RCBD with three replications during Rabi 2011-12 and 2012-13 at Vegetable Experimental Research Farm, Nauni, Solan H.P. to estimate the parameters of genetic variability, correlation and path analysis undernaturally ventilated polyhouse. Analysis of variance showed highly significant differences among genotypes for all the characters under study. Variability revealed that phenotypic co-efficient of variation (PCV) in general were higher than the corresponding genotypic co-efficient of variation (GCV) for all the characters. High co-efficient of variability were found for heading percentage (37.00% and 36.01%), incidence of sclerotinia rot (63.49% and 61.475%), gray mould (90.13% and 88.08%) and yield per plot (39.55% and 33.09%) indicated wider range of variation and offer better scope for improvement through selection. High heritability estimates coupled with moderate genetic gain were observed for yield and other horticultural traits. Correlation study indicated that yield per plot was positively correlated with gross and net head weight, seed germination, seed vigour index-I & II, 1000-seeds weight and also showed maximum direct effects towards yield per plot. The path co-efficient analysis revealed that net head weight has maximum positive direct effect on yield per plot followed by gross head weight, days to marketable maturity, seed germination, 1000-seeds weight, head shape index and incidence of sclerotinia rot. While, negative direct effect of number of non-wrapper leaves and incidence of gray mould was observed on yield. The new multicoloured cultivars indigenous and exotic mostly procured from CGN, Netherlands , identified for commercial cultivation under protected conditions in the mid hills of North Western Himalayas, may act as a substitute to the old cultivars with good quality and higher yielding potential.

scholarly journals Selection Criteria for Identification of High Yielding Rice (Oryza sativa L.) Genotypes under Aerobic Cultivation

2020 ◽  
pp. 102-109
Author(s):  
Ramya Rathod ◽  
B. Soundharya ◽  
Firdoz Shahana ◽  
P. Jalender Naik ◽  
Y. Swathi
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Oryza Sativa L ◽  
Grain Weight ◽  
Spikelet Fertility ◽  
Direct Selection ◽  
Biological Yield ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
1000 Grain Weight

Ten rice genotypes were evaluated to study the genetic variability, correlation and path analysis under aerobic conditions for selection of high yielding genotypes. The experiment is carried out in RCBD with 3 replications and the data is analysed in SPAR 2.0, Past 4.01 and OPSTAT for variability, correlation and path analysis respectively. The phenotypic and genotypic coefficients of variation were high for the number of productive tillers per plant, the number of filled grains per panicle, 1000-grain weight, biological yield and grain yield indicating the possibility of genetic improvement through direct selection for these traits. The magnitude of difference between PCV and GCV was less for the traits indicating little influence of environment. High heritability coupled with high genetic advance was recorded for the number of productive tillers per plant, the number of filled grains per panicle, 1000-grain weight, spikelet fertility, biological yield and grain yield indicating a preponderance of additive gene action, which provide excellent scope for further improvement by selection. Significant positive association of grain yield with number of productive tillers per plant, panicle length, number of filled grains per panicle, 1000-grain weight, spikelet fertility and biological yield was observed. Path analysis revealed the traits, number of filled grains per panicle exerted highest positive direct effect on grain yield followed by 1000-gain weight and number of productive tillers per plant. Thus, these traits which contribute to the grain yield under aerobic condition could be exploited for further breeding programme.

scholarly journals Multiple Regression, Correlation and Path Analysis of Gall Midge Incidence, Yield and Yield Components in Rice (Oryza sativa L.) Hybrids

2021 ◽  
pp. 33-45
Author(s):  
Sameena Begum ◽  
B. Srinivas ◽  
V. Ram Reddy ◽  
Ch. Aruna Kumari
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Direct Effect ◽  
Oryza Sativa L ◽  
Gall Midge ◽  
Positive Association ◽  
Panicle Length ◽  
Negative Effects ◽  
Kernel Length ◽  
Positive Direct

The present investigation was carried out to understand the interrelationship and degree of dependence of grain yield on its components and gall midge incidence and to elucidate their relative importance. The experiment was conducted using 42 rice hybrids developed by crossing 6 CMS lines and seven testers in Line X Tester mating design, their parents and four checks. Observations were recorded on gall midge incidence, grain yield and fourteen component characters. Correlation coefficient analysis suggested that grain yield per plant had highly significant and positive association with panicle length (rp = 0.4600**, rg = 0.5545**) followed by number of grains per panicle (rp = 0.4219**, rg = 0.5125**) and number of productive tillers per plant (rp = 0.4006**, rg = 0.4942**) and negative non significant association with gall midge incidence (rp =-0.1154, rg =-0.1430). Panicle length had the highest positive direct effect (0.9688) followed by the number of grains per panicle (0.5748). Gall midge incidence showed a negative direct effect at the phenotypic level and a positive direct effect at the genotypic level on the grain yield per plant. Further, it showed indirect negative effects via plant height, number of productive tillers per plant, number of grains per panicle, spikelet fertility, hulling percentage, milling percentage, kernel length and kernel breadth as revealed from path analysis. The result of multiple linear regression exhibited that only the number of productive tillers per plant and the number of grains per panicle contributed significantly towards grain yield per plant. The step-wise regression analysis revealed that the panicle length, number of grains per panicle and number of productive tillers per plant were the most important characters having R=0.6505 and thus, could explain 42.31% of the total variation of grain yield. Gall midge incidence contributed to only 0.95% of the variation for grain yield, which might be due to the low incidence or resistance of the hybrids to the gall midge.

scholarly journals Evaluation of bunch quality components in Dura x Dura progenies of Zambia and Camaroon sources of oil palm germplasm

2021 ◽  
Vol 42 (6) ◽  
pp. 1567-1677
Author(s):  
A. Pedapati ◽  
◽  
R.K. Mathur ◽  
G. Ravichandran ◽  
B.K. Babu ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Principal Component Analysis ◽  
Path Analysis ◽  
Oil Palm ◽  
Principal Component ◽  
Analysis Data ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Positive Significant Correlation ◽  
Selection Of

Aim: The present study was conducted to evaluate oil palm dura progenies developed from Zambia and Cameroon germplasm sources for bunch components for the selecting of high oil yielding mother palms. Methodology: Total 77 dura genotypes were evaluated by considering 15 different bunch components. Bunch analysis data were collected from tenth year onwards after planting. The genetic diversity, Principal component analysis, correlation and path analysis of the genotypes were estimated. Results: Study revealed that oil-to bunch ratio depends on fruit-to-bunch ratio and mesocarp-fruit ratio. The ANOVA value showed a significant variability among the genotypes for most of the bunch traits and the identified genotype P35 (24.53 %) was highest oil yielder. Positive significant correlation (p≤ 0.01) of mesocarp-to-fruit ratio and oil-to-dry mesocarp with oil-to-bunch ratio were noted in this study. Based on path analysis, the information obtained from this study is the oil-to-wet mesocarp ratio (0.697) showed the highest significant positive direct effect on oil-to-bunch ratio followed by mesocarp-to-fruit ratio (0.570). Interpretation: This study may support for the future selection of mother palms to utilize in oil palm improvement programmes. Introgression into existing breeding materials and breeding for seed production utilising selected palms.

scholarly journals Assessment of Genetic Variability and Correlation of Yield Related Traits in Chickpea (Cicer arietinum L.)

2021 ◽  
pp. 181-188
Author(s):  
Veeramalla Rohith Guptha ◽  
Gabrial M. Lal ◽  
Jakkam Mahipal Reddy ◽  
P. Venkata Bala Bramhanjaneyulu ◽  
C. Kalyan Sagar ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Path Analysis ◽  
Plant Height ◽  
Seed Yield ◽  
Block Design ◽  
Heritability Estimate ◽  
Selection Strategy ◽  
Plant Seed ◽  
Positive Direct ◽  
Number Of Seeds

The present investigation was undertaken with 21 genotypes of Chickpea, (including one check) during Rabi 2020-21 in a randomized block design with three replications at field experimentation centre of Department of Genetics and Plant Breeding. Sam Higginbottom University of Agriculture, Technology and Sciences. The data were recorded for 13 characters to study genetic variability, correlation and path analysis. Analysis of variance among 21 genotypes showed highly significant differences for all the characters indicated the presence of substantial amount of genetic variability. On the basis of mean performance, the highest seed yield was observed in genotype NBEG-1121 and RVS-5949. The estimates of GCV and PCV were moderate for plant height, number of primary branches. Low GCV and PCV was recorded for days to 50% flowering. The difference between PCV and GCV was very low for all 13 yield contributing characters. This indicates that the influence of environment factor was low on these characters. High heritability estimate was recorded for number of seeds per plant, number of secondary branches per plant. A high magnitude of genetic advance expressed as a percent of mean was observed in respect of number of seeds per plant, number of secondary branches per plant. Seed yield per plant exhibited positive and highly significant correlations with days to 50% Flowering, no of secondary branches at both genotypic and phenotypic level. The positive non-significant correlations of seed yield per plant were found with number of secondary branches and days to maturity. Negative non- significant correlation was being observed with the plant height, number of primary branches per plant and number of pods per plant. Path analysis at both genotypic and phenotypic level showed positive direct effects by days to 50% flowering, number of secondary branches per plant. The characters identified above as important components merit due to consideration in the formulation of effective selection strategy in chickpea for developing high yielding varieties.

Sign in / Sign up

Export Citation Format

Share Document