scholarly journals Genetic Variability and Correlation Studies for Pre-harvest Sprouting Tolerance and Associated Traits in Soybean [Glycine max L. Merrill.]

2021 ◽  
pp. 1-10
Author(s):  
G. Praveen Kumar ◽  
M. Pallavi ◽  
N. Swapna ◽  
Firdoz Shahana ◽  
G. Eswara Reddy ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Significant Negative Correlation ◽  
Negative Influence ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Coefficients Of Variation ◽  
Phenotypic Character ◽  
Glycine Max L ◽  
High Heritability ◽  
Pod Wall

Evaluation of a set of 65 diverse genotypes of soybean was carried out for their pre-harvest sprouting (PHS) tolerance in a field study during kharif 2019. Percentage of pods ruptured by sprouting seed (PPR) was used as a measure of pre-harvest sprouting tolerance. It ranged from 0-5.8% among the genotypes. High estimates of genotypic (GCV) and phenotypic coefficients of variation (PCV) were recorded for the percentage of pods ruptured by sprouting seed (PPR) indicating the presence of wider variability over which selection can be effective. High heritability coupled with high genetic advance as percent mean was recorded for number of pods ruptured by sprouting seed per plant and PPR. The phenotypic character association revealed a significant negative correlation of PPR with pod wall thickness, number of pods per plant, and number of clusters per plant. Path coefficient analysis revealed number of pods per plant, plant height, and pod wall thickness have a negative influence on pre-harvest sprouting.

ASSOCIATION OF CHARACTERS AND PATH COEFFICIENT ANALYSIS OF SEED YIELD AND YIELD COMPONENTS IN ONION (ALLIUM CEPA L.)

2001 ◽  
Vol 49 (2) ◽  
pp. 175-181
Author(s):  
S. Aklilu ◽  
L. Dessalegne ◽  
L. Currah
Keyword(s):  
Seed Yield ◽  
Correlation Coefficients ◽  
Significant Negative Correlation ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Flower Stalk ◽  
Allium Cepa L ◽  
Stalk Diameter ◽  
Positive Effect ◽  
High Seed Yield

Fifteen onion genotypes (one standard check and 14 exotic cultivars) were evaluated in RCBD with 3 replications at Melkassa Research Center during the 1999/2000 growing season (Aug.–Feb.). The objective of the study was to understand the association of characters with seed yield. The genotypic correlation coefficients were greater in magnitude than the phenotypic ones. Seed yield/plant had a high, significant correlation with number of flower stalks/plant, number of seeds and flowers/umbel and umbel size. Bolting and flowering period had a significant negative correlation with seed yield/plant. From the path analysis results, the number of flower stalks/plant, bolting period, thousand seed weight, flower stalk diameter and umbel size had a high direct positive effect on seed yield/plant. Since the direct and indirect effects through these components on seed yield are high and positive, selection should concentrate on these traits for high seed yield in onion cultivars. Since these components were found to affect seed yield they could be used for developing varieties for the growing onion industry in the country.

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. 

Path Coefficient Analysis in Different Genotypes of Soybean (Glycine max (L) Merril)

2003 ◽  
Vol 6 (12) ◽  
pp. 1085-1087 ◽  
Author(s):  
Shahid Iqbal ◽  
Tariq Mahmood ◽  
Tahira . ◽  
Muhammad Ali ◽  
Muhammad Anwar ◽  
...  
Keyword(s):  
Glycine Max ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Glycine Max L

CORRELATIONS AND PATH ANALYSIS IN CASTOR (RICINUS COMMUNIS)

1981 ◽  
Vol 23 (3) ◽  
pp. 525-531 ◽  
Author(s):  
Deepika Bhatt ◽  
Tummala P. Reddy
Keyword(s):  
Ricinus Communis ◽  
Correlation Coefficients ◽  
Path Coefficient ◽  
Genetic Advance ◽  
Path Coefficient Analysis ◽  
Days To Flowering ◽  
Coefficients Of Variation ◽  
Bean Yield ◽  
Positive Direct ◽  
Almost All

Estimates of broad sense heritability, genotypic and phenotypic coefficients of variation, genetic advance, correlation coefficients, and path coefficient analysis were made on eight attributes of castor (Ricinus communis L.). Almost all characters showed high genotypic and phenotypic coefficients of variation. Heritability estimates ranged from 0.152 for bean yield/plant to 0.893 for number of nodes to primary raceme. High genetic advance was exhibited by the characters plant height (124.0) and days to flowering (37.8). High positive phenotypic correlations on bean yield/plant were shown by all characters except days to flowering and number of nodes to primary raceme. Path-coefficient analysis indicated that both the number of capsules/primary raceme (0.74) and the number of secondary branches (0.62) have large positive direct effects on bean yield/plant. These observations indicate that semi-dwarf lines with a larger number of capsules/primary raceme, and a moderate number of primary and secondary branches should be considered as parents for castor breeding programs.

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.

Assessment of genetic variability, correlation and path coefficient analysis for morphological and quality traits in rice (Oryza sativa L.)

2017 ◽  
Author(s):  
Karthika Gunasekaran ◽  
Rajeswari Sivakami ◽  
Robin Sabariappan ◽  
Govintharaj Ponnaiah ◽  
Vishnu Varthini Nachimuthu ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Grain Yield ◽  
Oryza Sativa L ◽  
Dominant Gene ◽  
High Yield ◽  
Path Coefficient ◽  
Quality Traits ◽  
Path Coefficient Analysis ◽  
High Heritability ◽  
Rice Genotypes

Nine rice genotypes were evaluated for this present study. Genetic variability parameters, correlation and path coefficient analysis were estimated for eleven agronomic and quality traits. Among all the genotypes, ASD 16 recorded highest significant grain yield per plant. In this present study, the PCV was higher than GCV for all the characters studied. The grain yield per plant recorded highest GCV, high heritability coupled with high genetic advance which indicates that the trait were governed by epistasis and dominant gene action. Number of productive tillers per plant and thousand grain weight showed positive significant correlation and direct effects on grain yield per plant. The purpose of this study is to estimate the amount of variability present in this material, which in turn helps to select these material for further breeding programme to develop high yield hybrids combine with blast and leaf folder resistance.

Character association and path coefficient analysis for yield components and grain yield in soybean [Glycine max (L.) Merill.]

2017 ◽  
Author(s):  
S. U. Yahaya ◽  
E. Ankrumah.
Keyword(s):  
Grain Yield ◽  
Agricultural Research ◽  
Path Coefficient ◽  
Research Station ◽  
Path Coefficient Analysis ◽  
Rhizobium Inoculation ◽  
Glycine Max L ◽  
Criteria For Selection ◽  
Selection Of ◽  
Plot Design

Field experiment was conducted during kharif 2014 at the Agricultural Research Station Farm, Minjibir, Bayero University, Kano. The study was conducted to know the nature and magnitude of the associations of some yield attributing characters on grain yield in Soybean. There are eighteen treatments consisting of two levels (inoculated and non-inoculated) of rhizobium inoculation, three levels (0, 10, and 20 kg N ha-1) of nitrogen and three levels (0, 30, and 60 kg P2O5 ha-1) of phosphorus. These were laid in split-split plot design with three replications. Results of the study showed significant (p less than 0.01) positive associations between all the measured characters and grain yield. The path analysis also revealed that number of pods per plant has the greatest direct effect on grain yield. The greatest combined contributions of yield characters to grain yield in soybean were observed from number of pods per plant and number seeds per pod. Based on these findings, attention can be given towards improvement of number of pods per plant and number of seeds per pod as criteria for selection of soybean for increased grain yield.

scholarly journals YIELD PERFORMANCE, HERITABILITY AND INTERRELATIONSHIP IN SOME QUANTITATIVE TRAITS IN SUNFLOWER / RENDIMIENTO, HEREDABILIDAD Y LAS INTERRELACIONES DE CIERTAS CARACTERISTICAS CUANTITATIVAS DEL GIRASOL / RENDEMENT, HÉRIDITÉ ET INTERRELATIONS DE CERTAINS TRAITS QUANTITATIFS DU TOURNESOL

Helia ◽  
2001 ◽  
Vol 24 (34) ◽  
pp. 35-40 ◽  
Author(s):  
Ayub Khan
Keyword(s):  
Direct Effect ◽  
Seed Yield ◽  
Quantitative Traits ◽  
Oil Content ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Yield Performance ◽  
High Heritability ◽  
Positive Direct ◽  
Trait Correlation

SUMMARY Yield performance, heritability and trait correlation were studied in 20 sunflower genotypes. Hybrid SF-100 produced the highest seed yield of 3669 kg ha-1 followed by NK-265 and Gloriasol with 3289 and 3264 kg ha-1, respectively. Heritability (broad sense) values ranged from -5.58% in seed per capitulum to 98.72 for 50% flower. 100-achene weight, 1st flower, complete flowering, maturity, and oil content showed high heritability values of 98.65%, 98.56%, 98.38%, 96.03% and 95.72%, respectively. Seed yield was positively correlated with all traits studied. Path coefficient analysis revealed that first flower had the highest positive direct effect on seed yield followed by seed per capitulum, 100-achene weight complete flower, and head diameter, while 50% flower had the greatest negative direct effect on seed yield.

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