scholarly journals Correlation and Path Coefficient Analysis for ‘Yield Contributing’ Traits in Quality Protein Maize (Zea mays L.)

2020 ◽  
pp. 91-99
Author(s):  
Digvijay Singh ◽  
Ajay Kumar ◽  
Rajesh Kumar ◽  
Satish Kumar Singh ◽  
Nitesh Kushwaha ◽  
...  
Keyword(s):  
Grain Yield ◽  
Association Studies ◽  
Research Work ◽  
Positive Association ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Significant Positive Association ◽  
Maize Genotypes ◽  
Ear Height ◽  
Positive Direct

Character association studies will help to assess the relationship among the yield and its components for enhancing the usefulness of the selection. In view of this, the present research work was carried out to assess the correlation coefficient and path analysis among twenty five maize genotypes using eleven quantitative parameters. Correlation studies indicated that plant height (cm), ear height (cm), ear length (cm), ear girth (cm), number of kernel rows per ear, number of kernels per row showed significant positive association with grain yield (Kg/ha) as well as among themselves at phenotypic and genotypic level. Hence, selection for any one of these characters would bring in simultaneous improvement of other characters and also finally improvement in grain yield (kg/ha). Path coefficient analysis revealed that the highest positive direct effects on grain yield  was exhibited by days to 75% tasseling, ear length, days to 75% brown husk, ear height and ear girth. Therefore, present investigation could be helpful in a reliable selection of parental lines based on the above given traits as well as for the development of high yielding verities for further breeding programs.

scholarly journals Study of Trait Alliance with Grainyield, Its Attributes of Different Land Races of Maize (Zea MaysL.)

2017 ◽  
Vol 5 (2) ◽  
pp. 184-190
Author(s):  
R. A. Gami ◽  
J.M Patatel ◽  
G. K. Chaudhary ◽  
S. M. Chaudhary
Keyword(s):  
Grain Yield ◽  
Positive Association ◽  
Path Coefficient ◽  
Direct Effects ◽  
Path Coefficient Analysis ◽  
Significant Positive Association ◽  
Land Races ◽  
Component Traits ◽  
Ear Height ◽  
Positive Direct

The research was carried out to study the correlation and path coefficient analysis of 51 different land races of maize for yield and component traits. Analysis of correlation between different characters suggested that the value of genotypic correlation were somewhat higher as compared to their corresponding phenotypic correlations signified the inherent relationship among the characters. Grain yield kg per ha. showed significant positive association with days to 50% pollenshed, days to 50% silking, days to 75% dry husk, number of cobs per plot, cob weight per plot and shalling perportion at both genotypic and phenotypic levels. Path co-efficient analysis revealed that the maximum positive direct effects of cob weight per plot, shelling perportion, ear height and number of cobs per plot towards grain yield. This finding suggested that more emphasis should be given to number of cobs per plot, cob weight per plot and shalling perportion in selection programmes aiming to improve grain yield in maize.

scholarly journals Correlation and Path Coefficient Analysis of Tomato Germplasms

2015 ◽  
Vol 3 (2) ◽  
pp. 223-226
Author(s):  
Md. Salehur Rahman ◽  
Shahanaz Parveen ◽  
Md.Harun -Ur- Rashid ◽  
Runa Akter ◽  
Abu Yousuf Hossin ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Phenotypic Expression ◽  
Positive Association ◽  
Suppressive Effect ◽  
Phenotypic Correlation ◽  
Path Coefficient ◽  
Genotypic Correlation ◽  
Path Coefficient Analysis ◽  
Significant Positive Association ◽  
Positive Direct

Forty eight genotypes of tomato were evaluated for yield contributing characters to observe their associations and direct and indirect effect on yield. Character association analysis among yield and yield contributing characters revealed that in most of cases the genotypic correlation coefficient was higher than the respective phenotypic correlation coefficients. This indicated that the suppressive effect of the environment modified the phenotypic expression of these characters by reducing phenotypic correlation values. Also, narrow difference between phenotypic and genotypic correlation coefficient was noticed for almost all the pairs of characters studied showing that masking or modifying effects of the environment was little indicating the presence of an inherent association among these characters. Fruit/cluster showed non-significant positive association with yield/plant at genotypic and phenotypic level but individual weight of fruit had significant negative association at phenotypic level with yield/plant. Path coefficient analysis revealed that no. of fruit/cluster had the highest positive direct effects on fruit yield/plant suggesting their importance while imposing selection for correlation of yield in tomato.Int J Appl Sci Biotechnol, Vol 3(2): 223-226 DOI: http://dx.doi.org/10.3126/ijasbt.v3i2.12421 

scholarly journals Correlation and Path Coefficient Analysis Studies on Grain Yield and Its Contributing Characters in Maize (Zea mays L.)

2020 ◽  
pp. 7-13
Author(s):  
O. P. Taiwo ◽  
A. I. Nwonuala ◽  
B. F. Isaiah ◽  
D. O. Olawamide ◽  
I. K. Agbugba
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Maize Grain Yield ◽  
Maize Varieties ◽  
Ear Height ◽  
Maize Grain ◽  
Selection For ◽  
Positive Direct

In crop breeding, the selection for yield is made complex because of the quantitative and polygenic nature of the character. This study was undertaken to assess character association and show the contribution of various yield contributing characters in some maize varieties through the help of correlation and path coefficient analyses in order to identify appropriate plant characters for selection to improve maize grain yield. Seventeen maize varieties were sown in a randomized complete block design with three replications in a humid environment of Port Harcourt, Nigeria in 2018 under rainfed condition. Data were recorded for days to 50% anthesis, days to 50% silking, anthesis-silking interval, plant height (cm) and ear height (cm), number of plants per plot, number of plants harvested, number of ears harvested, moisture content (%), field weight (kg), and grain yield (t ha-1). Results showed number of plants per plot, number of plants harvested, number of ears harvested and field weight correlated positively and significantly both phenotypically and genotypically with grain yield. Path coefficient analysis at the genotypic level also revealed field weight and days to 50% anthesis as the characters exerting the highest positive direct effect on grain yield. Therefore, maize grain yield could be improved through indirect selection for these characters.

scholarly journals Variability of Different Yield Contributing Parameters and Yield of Some Okra (Abelmoschus esculentus) Accessions

1970 ◽  
Vol 4 (1) ◽  
pp. 119-127
Author(s):  
AKM Ashraful Alam ◽  
Md Mokbul Hossain
Keyword(s):  
Dry Matter ◽  
Positive Association ◽  
Matter Content ◽  
Path Coefficient ◽  
Dry Matter Content ◽  
Path Coefficient Analysis ◽  
Significant Positive Association ◽  
Wide Range ◽  
Range Of Variation ◽  
Genotypic Coefficient Of Variation

In order to assess the variability of yield contributing characters of 50 okra accessions and their interrelation effects on the yield of green pod a field experiment was undertaken at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period from February, 2002 to May, 2002. A wide range of variation was observed in case of weight of green pod per plant (105- 281g), days to first flowering (40-52days) and weight of individual green pod (14-26g). Moderate variation for length of green pod (12-19cm), number of green pods per plant (6-11) and yield of green pod (4-13 t/ha), lesser variation for percent of dry matter content (5-8%), number of ridges per green pod (5-9) and diameter of green pod (1-2cm) was observed. The highest genotypic coefficient of variation was observed in case of yield of green pod (GCV= 23.22%) followed by weight of green pod per plant (22.24%), weight of individual green pod (18.68%), number of ridges per green pod (13.49%), number of green pod per plant (10.84%), dry matter content of green pod (10.48%), diameter of green pod (6.90%) and length of green pod (6.24%). These characters suggested the existence of justifiable genetic distance among different cultivars. Correlation coefficient indicated that yield of green pod had highly significant positive association with weight of green pod per plant and weight of individual green pod. Path coefficient analysis showed that the weight of green pod per plant and weight of individual green pod were directly contributed towards the yield of green pod. Key words: Okra, accession, variability, yield.

scholarly journals Evaluation of Underutilized Kodo Millet (Paspalum scrobiculatum L.) Accessions using Morphological and Quality Traits

2020 ◽  
Author(s):  
V. Nirubana ◽  
R. Ravikesavan ◽  
K. Ganesamurthy
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Association Studies ◽  
Antioxidant Properties ◽  
Flowering Plant ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Wide Range ◽  
Kodo Millet ◽  
Inflorescence Length

Background: Kodo millet is an important drought tolerant crop and has high nutritional values, dietary fiber and antioxidant properties. It has considerable production potential in marginal and low fertility soils under diverse environmental conditions. Considering the importance of the crop, it is necessary to improve the nutritional quality along with grain yield of the crop. With this background, the investigation was aimed to study the correlation and path coefficient analysis which helps to identify the promising traits for yield and quality improvement. Methods: One hundred and three kodo millet germplasm lines were evaluated for 13 morpho-agronomic and two grain nutritional traits. The crop was raised in randomized block design to select the promising genotypes and to study the association among the traits and the magnitude of direct and indirect effects for fifteen quantitative traits. Result: Based on the overall mean performance the significant genotypes were identified and found wide range of variability for different traits. Character association studies indicated that days to first flowering, days to 50 per cent flowering, plant height, number of productive tillers, peduncle length, inflorescence length, length of the longest raceme and thumb length were significantly positive association with grain yield per plant. Path coefficient analysis revealed that inflorescence length, plant height, length of the longest raceme, flag leaf blade length and number of productive tillers exhibited high direct positive effect on grain yield. Therefore, giving importance of these traits during selections may be useful for developing nutritionally superior high yielding kodo millet genotypes.

Genetic variability and character association studies in Jack bean [Canavalia ensiformis (L.) Dc.] for quality characters

2015 ◽  
Vol 35 (4) ◽  
Author(s):  
Pradeepthi Lenkala ◽  
K. Radha Rani ◽  
N. Sivaraj ◽  
K. Ravinder Reddy ◽  
M. Jaya Prada
Keyword(s):  
Genetic Variability ◽  
Protein Content ◽  
Iron Content ◽  
Association Studies ◽  
Positive Association ◽  
Calcium Content ◽  
Sodium Content ◽  
Significant Positive Association ◽  
Jack Bean ◽  
Positive Direct

The experiment was conducted at NBPGR Regional Station, Rajendranagar during 2013-14 (August 2013 to February 2014) to study the genetic variability and association among the quality characters in jack bean. The results revealed that significant variation was observed for all the characters. Among the characters studied, the highest heritability coupled with genetic advance as percent of mean was observed for magnesium followed by calcium and iron contents. However, heritability alone was found to be highest for iron content followed by magnesium, calcium and protein contents. Calcium content had significant positive association with protein content whereas magnesium, calcium and iron content recorded the positive direct effect on protein content while sodium content have negative effect.

scholarly journals Interrelationship and Cause - Effect Analysis for Yield and Yield Attributing Traits in Rice (Oryza sativa L.) Genotypes

2020 ◽  
pp. 511-518
Author(s):  
B. Soundharya ◽  
Ramya Rathod ◽  
Firdoz Shahana ◽  
Y. Swathi ◽  
P. Jalender Naik ◽  
...  
Keyword(s):  
Oryza Sativa L ◽  
Positive Association ◽  
Test Weight ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Effect Analysis ◽  
Rice Genotypes ◽  
Selection For ◽  
High Yielding Varieties ◽  
Positive Direct

The basic aim of plant breeders is to improve the yielding potential of existing varieties along with creation of new high yielding varieties. This experiment was carried out to study the association of yield and yield attributing traits along with path coefficient analysis among twenty rice genotypes. Analysis of variance revealed the existence of significant differences in genotypes for all the characters studied. Grain yield had positive significant association with ear bearing tillers/m2 (0.5395**/0.6264**), number of filled grains per panicle (0.5236**/0.5774**) and test weight (0.2575*/0.2560*) and days to 50 percent flowering (0.3294**/0.3648**), It indicates that these characters are important for yield improvement. Path coefficient analysis revealed maximum positive direct effect of number of filled grains per panicle (1.4128/1.8979), test weight(1.1812/1.5927), days to fifty percent flowering (0.2404/0.1669), ear bearing tillers (0.0159/0.1224) and panicle length(0.0710/0.0813). Selection for the traits with positive association and direct effects will be useful for the improvement in yield of rice through breeding programme.

scholarly journals Genetic diversity and character association analysis based on pomological traits in olive (Olea europaea L.)

2017 ◽  
Vol 9 (3) ◽  
pp. 1551-1556
Author(s):  
S. Lal ◽  
O. C. Sharma ◽  
D. B. Singh
Keyword(s):  
Olea Europaea ◽  
Oil Content ◽  
Positive Association ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Path Coefficient ◽  
Path Coefficient Analysis ◽  
Significant Positive Association ◽  
Olea Europaea L ◽  
Olea Europaéa

Thirteen exotic genotypes of olive (Olea europaea L.) were studied for the genetic variability, correlation and path coefficient analysis for fruit quality, yield and yield contributing traits at experimental farm of ICAR-CITH, Srinagar during 2009-2013. Maximum variability was recorded for fruit yield and oil content, however, low differ-ences between the phenotypic and genotypic coefficients of variations indicated low environmental influences on the expression of these characters. High heritability coupled with high genetic advance was obtained with fruit yield per plant, acidity, fruit pulp weight, fruit weight and stone weight. Fruit weight (r=0.329), stone weight (r=0.405) and oil content (r=0.841) were the most important traits, which possessed significant positive association with fruit yield per plant. Path coefficient analysis revealed that among the different yield contributing characters oil content (0.875), fruit weight (0.797) followed by acidity (0.501), peroxides value ( 0.199) and fruit length (0.054) influenced fruit yield per plant directly. The direct effects of these characters on fruit yield were found positive and considerably very high.The selection based on fruit weight, stone weight oil content and yield per plant will be effective for enhancing the fruit and oil yieldand making future olive breeding strategies.

Path analysis for quality traits in field pea (Pisum sativum L.)

2017 ◽  
Vol 37 (04) ◽  
Author(s):  
HemantLovely Toppo ◽  
R. N. Sharma ◽  
A. Thakur
Keyword(s):  
Seed Yield ◽  
Block Design ◽  
Additive Genetic Variance ◽  
Positive Association ◽  
Field Pea ◽  
Direct Selection ◽  
Path Coefficient ◽  
Significant Positive Association ◽  
Qualitative Characters ◽  
Positive Direct

The present experiment was conducted during November 2014–March 2015. The experiment was done to estimate the variability and character association of different qualitative characters on seed yield of 29 field pea genotypes in a randomised complete block design (RCBD). The analysis of variance revealed that the sufficient variability was present in the material studied for almost all the qualitative characters. Among the different quality parameters the moderate genotypic coefficient of variation was for swelling index. Among the quality parameter, high heritability coupled with high genetic advance was not recorded for any quality character indicating non-significant additive genetic variance in genetic control of these traits. The correlation analysis revealed that seed yield plant-1 exhibited a significant positive association with protein at genotypic level. Path coefficient analysis for seed yield and its components showed that protein content had the negligible positive direct effect on seed yield. Direct selection for quality characters would likely not be effective in increasing or decreasing seed yield in field pea.

scholarly journals Path analysis for grain yield in barnyard millet (Echinochloa frumentacea (Roxb.) link )

2015 ◽  
Vol 44 (1) ◽  
pp. 147-150
Author(s):  
R Prakash ◽  
C Vanniarajan
Keyword(s):  
Grain Yield ◽  
Indirect Effects ◽  
Association Studies ◽  
Path Coefficient ◽  
Direct And Indirect Effects ◽  
Direct Effects ◽  
Path Coefficient Analysis ◽  
Barnyard Millet ◽  
Straw Yield ◽  
Echinochloa Frumentacea

Path coefficient analysis was studied in 65 genotypes of barnyard millet to find out the association studies of characters and their direct and indirect effects on grain yield/plant. Results exhibited that single earhead weight had maximum direct effects on grain yield/plant followed by straw yield/plant, earhead length and plant height. DOI: http://dx.doi.org/10.3329/bjb.v44i1.22739 Bangladesh J. Bot. 44(1): 147-150, 2015 (March)

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