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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(1): 1423-1430
DOI: https://doi.org/10.20546/ijcmas.2019.801.151


Study of Genetic Variability and Correlations in a Mutant Population of Groundnut
Venkatesh1*, A.G. Vijaykumar1, B.N. Motagi1 and R.S. Bhat2
1Department of Genetics and Plant Breeding, University of Agricultural Sciences, Dharwad, India
2Department of Biotechnology, University of Agricultural Sciences, Dharwad-580 005, Karnataka, India
*Corresponding author
Abstract:

A mutant population comprising of 42 primary mutants, 7 secondary mutants and 4 tertiary mutants along with the parent Dharwad Early Runner (DER) and eight most popular groundnut varieties were evaluated during kharif 2012 for various agronomic, traits and for resistance to rust and late leaf spot. The genotypes showed significant genotypic differences for all the quantitative and nutritional traits studied. They also differed significantly for rust and LLS resistance except for LLS at 70 DAS. Phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) revealed high variability for number of pods/plant and pod yield/plant (g). LLS and rust resistance at three stages exhibited moderate variability. Number of pods/plant (g) and pod yield/plant (g) also showed very high heritability and genetic advance over mean. Moderately high heritability was observed for LLS and rust resistance at 80 and 90 DAS when compared to 70 DAS. Pod yield/plant (g) showed positive and significant phenotypic and genotypic correlation with number of pods/plant, shelling percentage, test weight (g), SMK (%) and pod length (cm). Pod yield/plant (g) showed negative but significant correlation both at phenotypic and genotypic level with scores taken at all the three stages of LLS and rust disease development. The association analyses between stages (70, 80 and 90 DAS) showed positive and significant phenotypic correlation for LLS and rust resistance. However, the association between LLS and rust resistance across the stages was not significant. Pod yield per plant (g) can be considered as a tool in selection programme to enhance groundnut productivity, as it showed high heritability coupled with high genetic advance over mean (GAM) and positive association with productivity traits.


Keywords: Variability, Correlation, Yield, Heritability
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How to cite this article:

Venkatesh, A. G. Vijaykumar, B. N. Motagi and Bhat, R.S. 2019. Study of Genetic Variability and Correlations in a Mutant Population of Groundnut.Int.J.Curr.Microbiol.App.Sci. 8(1): 1423-1430. doi: https://doi.org/10.20546/ijcmas.2019.801.151