To Study the Correlation, Path Coefficient Analysis and Selection Indices in Bulk Population (F5-Generation) of Mung Bean
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Date
2013
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JNKVV
Abstract
ABSTRACT
The present study entitled “To study the correlation, path coefficient analysis and selection indices, in bulk population (F5-Generation) of Mungbean” was conducted at JNKVV College Farm, College of Agriculture Rewa, (M.P.) during the kharif year 2012. The genetic material consisting of 2 diverse checks and eighteen crosses of mungbean were sown in plot size of 4.0m. X 3.0m. The experiment was conducted in Randomized Block Design with four replications. The row and plant spacing was maintained at 40cm and 10cm respectively. The observations were recorded replication wise by selecting 60 random plants for eleven quantitative characters.
The F5 generation of the crosses of mungbean were studied for variability, correlation and path coefficient analysis for yield and yield contributing characters and formulation of selection indices for grain yield.
Yield is a complex character resulting from interaction of a number of component characters influenced by environmental fluctuations. The critical assessment of the nature and magnitude of variability in the available germplasm is the pre-requisite of any breeding programme.
Analysis of variance revealed highly significant variance for all the traits studied depicting greater variability in the existing material. The PCV was higher than GCV for all the characters. High PCV and GCV were observed for biological yield per plant, primary branches per plant, harvest index and plant height. High estimates of heritability were obtained for character viz. days to 50% flowering, plant height, days to maturity, pods per plant, grains per pod and harvest index. The characters namely biological yield per plant, primary branches per plant, harvest index, grains per pod and grain yield per plant exhibited higher values of genetic advance as percent of mean. Occurrence of high heritability associated with high genetic advance was observed for plant height, grains per pod, harvest index, biological yield per plant, days to 50% flowering and grain yield per plant that suggested that that they can be improved through direct selection.
The association studies indicated the advantages of upscaling mungbean genotypes through simultaneous selection for days to 50% flowering, 100 grain weight, days to maturity and harvest index.
Path coefficient analysis revealed that highest consideration should be given to pods per plant, plant height, biological yield per plant and harvest index for improvement of grain yield in mungbean.
The estimate of selection indices revealed that among the tested genotypes, PDM 139 X LGG 460, TJM 3 X HUM 1, PDM 11 X K 851, Ganga 8 X K 851 and PDM 11 X TJM 3 had genetic potential for higher grain yield of mungbean and high yielding pure lines may be isolated from there.
It is concluded from the present study that for the improvement of seed yield in mungbean, it is advantageous to adopt indirect selection based on component traits particularly biological yield per plant, days to 50% flowering, 100 grain weight, plant height and pods per plant than direct selection based on yield.
Keywords: Mungbean, variability, heritability, association, selection, yield.
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PLANT BREEDING & GENETICS