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Genetic Variability, Correlation and Path Analysis in Mungbean (vigna Radiata L)

K. M. Muzibul Alom
Department of Genetics and Plant Breeding, Patuakhali Science and Technology University, Patuakhali

M. H. Rashid
BARI, Rahmatpur, Barisal

M. Biswas
Homeo Hall, Upazilla Road, Agaiijhara, Barisal

Abstract/ Executive Summary:

An experiment was conducted at the Regional Agricultural Research Station (RARS), BARI, Rahmatpur, and Barisal during the period from January, 2013 to April, 2013 to study on the variability, heritability, genetic advance and interrelationship via correlation co–efficient and path co–efficient analysis among the important eight characters in relation to seed yield. Significant variation was observed among the studied 54 mungbean genotypes for all characters. Different genotypes were found superior for different characters. Among the genotypes, ACC–12810002 for plant height (71.80 cm), TPK–2558–97 for days to 50% flowering (48.67 days as minimum), BC–6960–88 and VO–1558 (B–G) for days to pod maturity (89.00 days as minimum), VC–6149 (B–12) for pod length (17.30 cm), ACC–12810006 for pods plant^–1 (31.73), ACC–12890073 for seeds pod^–1 (17.60), VC–6960–88 for 100– seed weight (5.63 g) and GK–40 for seed yield (1846.00 kg ha^–1) were found to be the superior genotypes. Including seed yield, all the characters, except seeds pod^–1 exhibited high heritability accompanied by medium to high genetic advance as percent of mean. These characters also showed medium to high GCV and PCV. However seeds pod^–1 showed moderate heritability and genetic advance as present of mean. In all these case significant genotypic correlation co–efficient were found to be higher than their corresponding phenotypic ones. The character 100–seed weight showed significant positive relationship with seed yield. Path co– efficient analysis suggested that pods plant^–1 contributed maximum direct effects having positive on seed yield. Plant height, pod length and 100–seed weight had also positive direct effect on seed yield. Thus selection based on pods plant^–1, days to first flowering, plant height and 100–seed weight might be effective for improving seed yield in mungbean.

Keywords: Mungbean, Heritability, Genotypic and phenotypic variances, Genetic advance, Path analysis

Location: Field of PBD, RARS, BARI, Rahmatpur, and Barisal

Start Date: 00-01-2013

End Date: 00-04-2013

Program Area: Variety and Species

Commodity: Mungbean

Objectives:

1. To evaluate the field performance and to selection indices via GCV, PCV and their relative efficiencies in relation to correlation coefficient and path analysis.

Methodology:

The experiment was conducted at the research field of PBD, RARS, BARI, Rahmatpur, and Barisal during the period from January, 2013 to April, 2013. The RARS, Rahmatpur, Barisal lies at the 22⁰42” North latitude and 90^o23” East longitude at an elevation of 4 meter above the sea level. It belongs to the Non–calcarious Grey Floodplain Soils (Non saline, Ganges Tidal Alluvium) under AEZ 13. The experimental materials comprised of 54 local and exotic summer mungbean germplasm. All the genotypes were obtained from the Pulse Research Centre, BARI, Rahmatpur, and Barisal. The experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. The size of unit plot was 2.4 m × 2 m. The distances of 40 cm between rows, 75 cm between plots and 1 m between replications. The experimental field was prepared by repeated ploughing followed by laddering. After ploughing and laddering all the stubble and uprooted weeds were removed from the field. Before final land preparation, Urea, TSP and Mop fertilizers were applied at the rate of 20, 50 and 30 kg ha^–1, respectively as basal dose. Seeds were shown on the 15 February, 2013. Various intercultural operations were also done for better growth of seedlings. Five randomly selected plants were harvested plot–1 when color of almost all the pods become black or brown. Pods of each plant were kept separately in paper bags and sung dried. Threshing was done by hand and strict care was taken to avoid mechanical mixture of seeds. Data on different parameters such as plant height, days to first flowering, days to total pod maturity, pod length, pods plant^–1, seeds pod^–1, 100–seed weight and seed yield were recorded from each plot. The obtained data were statistically analyzed in MSTAT–C computer program by RCBD. The analyses of variance for various crop characters were done following the principle of F–statistics. To test the differences between of genotypes, Duncan’s Multiple Range Test (DMRT) was performed by M–STATC computer program. Pearson’s correlation coefficients were calculated to determine the relationships between yield and yield components. Path coefficient analysis was used to partition the correlation coefficients and to determine the direct and indirect effects.

Source of Information: J. Environ. Sci. & Natural Resources, 7(1): 131–138, 2014; ISSN 1999–7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Among the genotypes, ACC–12810002 for plant height (71.80 cm), TPK–2558–97 for days to 50% flowering (48.67 days as minimum), BC–6960–88 and VO–1558 (B–G) for days to pod maturity (89.00 days as minimum), VC–6149 (B–12) for pod length (17.30 cm), ACC–12810006 for pods plant^–1 (31.73), ACC–12890073 for seeds pod^–1 (17.60), VC–6960–88 for 100–seed weight (5.63 g) and GK–40 for seed yield (1846.00 kg ha^–1) were found to be the superior genotypes. Including seed yield, all the characters, except seeds pod^–1 exhibited high heritability accompanied by medium to high genetic advance as percent of mean. These characters also showed medium to high GCV and PCV. However seeds pod^–1 showed moderate heritability and genetic advance as present of mean. In all these case significant genotypic correlation co–efficient were found to be higher than their corresponding phenotypic ones. The character 100–seed weight showed significant positive relationship with seed yield. Path co–efficient analysis suggested that pods plant^–1 contributed maximum direct effects having positive on seed yield. Plant height, pod length and 100–seed weight had also positive direct effect on seed yield. Thus selection based on pods plant^–1, days to first flowering, plant height and 100–seed weight might be effective for improving seed yield in mungbean.

Knowledge Management: Journal