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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 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(1): 867-873
DOI: https://doi.org/10.20546/ijcmas.2018.701.105


Genetic Association Estimates Using Third and Fourth Degree Statistics in Early Segregating Generations of Cowpea
H.B. Dinesh*, K.P. Viswanatha, H.C. Lohithaswa, R. Pavan and Poonam Singh
Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bangalore 560 065, Karnataka, India
*Corresponding author
Abstract:

Correlation and presence of genetic interactions was studied using F2 and F3 generations in two cowpea crosses for yield and its component traits. Most of the characters studied were positively skewed and were being governed by several genes indicating quantitative inheritance. Variance, skewness and kurtosis have also indicated that homozygosity has increased from the generation to generation in cowpea crosses. Cross A (C-152 × V-16) was found better than crossB (C-152 × V-57817) in providing high yielding segregants displaying parental diversity. Number of branches and 100 seed weight were positively skewed in both crosses and in both the generation. Number of seeds per pod and seed yield per plant was positively skewed in cross A while number of pods per plant was positively skewed in cross B. which is a true indication of complementary gene interaction with other genes governing these characters. Whereas, plant height was negatively skewed in both cross this indicates duplicate gene interaction. Yield increase is possible by following rigid selection for yield and its component characters. A shift in correlation coefficients between the generations was recorded which is likely to be attributed to difference in gene complementation of linkage blocks and an indication of unstable nature of breeding population.


Keywords: Correlation, Cowpea, Gene interaction, Kurtosis, Skewness
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How to cite this article:

Dinesh, H.B., K.P. Viswanatha, H.C. Lohithaswa, R. Pavan and Poonam Singh. 2018. Genetic Association Estimates Using Third and Fourth Degree Statistics in Early Segregating Generations of Cowpea.Int.J.Curr.Microbiol.App.Sci. 7(1): 867-873. doi: https://doi.org/10.20546/ijcmas.2018.701.105