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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 5
First page : (124) Last page : (129)
Article doi: :

Correlation and Path-Coefficient Analysis of Yield and Selected Yield Components of Macadamia (Macadamia integrefolia) Genotypes

Usha, D. S.1*, Nagarajappa Adivappar2, Lakshmana, D.3, Shivakumar, B. S.1, Thippesh, D.4

1Department of Fruit Science, College of Horticulture, Mudigere-577132, Karnataka, India
2Zonal Agricultural and Horticultural Research Station, Shivamogga-577204, Karnataka, India
3Department of Crop Improvement and Biotechnology, College of Horticulture, Mudigere, Karnataka, India
4Department of Horticulture, College of Agriculture, Shivamogga – 577204, Karnataka, India
*Corresponding Author E-mail:
Received: 20.08.2018 | Revised: 16.09.2018 | Accepted: 28.09.2018  



An experiment was conducted to determine correlations among important yield components using 10 macadamia genotypes (G-1, G-3, G-4, G-5, G-6, G-9, G-10, G-11,     G-12, and G-13.) in existing orchards in farmer field in Gajanur village, Shivamogga district in Karnataka, India, during the year 2017-18. Ten traits viz., nut weight, shell weight, pericarp weight, kernel weight, nut volume, nut diameter, Kernel thickness, shell thickness, cluster length and nuts per cluster were evaluated for correlation and path analysis. Results depicted that yield was influenced by direct and indirect effects of different traits. Kernel weight and nut diameter of macadamia nut were the most important properties that directly increase the nut yield per tree. Kernel weight increased as shell thickness decreased. Cluster length, nut weight, and number of nuts per cluster were determined as the most important characters that directly affected the nut yield per tree. Kernel weight and yield per tree were the most important characters for macadamia breeding researches and were positively associated. Shell thickness and pericarp weight had negative effect on both the kernel weight and the yield per tree whereas kernel weight, nut weight and nut diameter had the positive direct effect on nut yield per tree. It is suggested that these properties can be used as a criteria for selection in macadamia breeding research studies.

Key words: Correlation, Kernel weight, Macadamia, Path analysis.

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Cite this article: Usha, D.S., Adivappar, N., Lakshmana, D., Shivakumar, B.S., Thippesh, D., Correlation and Path-Coefficient Analysis of Yield and Selected Yield Components of Macadamia (Macadamia integrefolia) Genotypes, Int. J. Pure App. Biosci.6(5): 124-129 (2018). doi: