Correlation and Path Coefficient Analysis of Plant Dry Pod Yield and Its Yield Components in Groundnut (Arachis hypogaea L.)
Pappuru Manogna
Department of Genetics and Plant Breeding, M. S. Swaminathan School of Agriculture, Centurion University of Technology & Management, Paralakhemundi, Odisha – 761211, India.
Hari Ram Kumar Bandi *
Department of Genetics & Plant Breeding, Dr.YSRHU-College of Horticulture, Parvathipuram, Manyam, District-535502, India.
K Krishnam Raju
Department of Genetics and Plant Breeding, M. S. Swaminathan School of Agriculture, CUTM, Paralakhemundi, Odisha – 761211, India.
Raghu Gogada
Department of Biochemistry and Plant Physiology, M. S. Swaminathan School of Agriculture, CUTM, Paralakhemundi, Odisha – 761211, India.
*Author to whom correspondence should be addressed.
Abstract
The correlation between plant dry pod yield and other traits like number of pegs, number of pods and fresh pod yield per plant was found to be significantly positive in 30 groundnut genotypes studied under a randomized block design in triplicates. Thus, these traits might be used as the basis for the selection of genotypes that can produce high pod yield. The same time, in path coefficient analysis indicated the real (true) correlation of number of pods per plant and fresh pod yield per plant with dry pod yield per plant by connecting significant positive association and positive direct effect which implied a very high positive direct contribution. Hence, direct selection of the quantitative traits (i.e., number of pods per plant and fresh pod yield per plant) would be more effective in the simultaneous improvement of dry pod yield in groundnut breeding programs.
Keywords: Correlation, path coefficient, residual effect, direct effect and indirect effect