Studies on Correlation and Path Analysis in Mutants of Coleus (Coleus forskohlii Briq.) for Yield and forskolin Content in V2M1 Generation
DOI:
https://doi.org/10.24154/jhs.v4i1.559Keywords:
Coleus forskohlii, Correlation, Path AnalysisAbstract
The present investigation was carried out during 2003-2007 involving terminal cuttings of coleus ecotype 'Garmai'. Genotypic correlation coefficient between yield and its components in mutants of coleus was studied, viz., plant height, number of branches plant-1, number of leaves plant-1, number of tubers plant-1, tuber length and tuber girth were found to have positive and highly significant correlation with yield. However, forskolin and essential oil content showed negative correlation with yield. Path analysis of component characters on yield of Coleus in V2M1 generation exerted positive direct effect through the characters plant height, number of leaves plant-1 and number of tubers plant-1. Similarly, direct effect was observed to be negative through number of branches plant-1 (-0.930), total amount of alkaloids (-0.066) and forskolin content (-0.026). The current investigation resulted in residual effect of 0.158 indicating the accuracy and appropriate selection of component character for crop improvement programme. Weightage must be given to component characters exhibiting positive attributes towards fresh tuber yield in Coleus. However, some traits with negative attributes are also chosen for getting improved quality, i.e., forskolin content, without much inhibition on fresh tuber yield plant-1.
Downloads
References
A.S.T.A. 1960. Official analytical methods of the American spice trade association, New York, pp. 41-42
Bhandari, M.M. and Gupta, G.S. 1991. Association analysis of Opium poppy Linn. Int’l. J. Trop. Agri., 9 (1): 42-44
Bhat, S.V., Bajwa, B.S., Dornauer, H., DeSouza, N.J. and Fehlilhaber, H.W. 1977. Structure and stereochemistry of new labdane diterpenoid from Coleus forskohlii. Tetrahedron Lett., 19:1669-1672
Dewey, D.R. and Lu, K.H. 1959. A correlation and path coefficient analysis of components of crested wheat grass seed production. Agron. J., 51:515-518
Geetha, V. and Prabhakaran, P.V. 1987. Genotypic variability, correlation and path coefficient analysis in turmeric. Agril. Res. J. Kerala, 25:249-254
Hegde, L. 2001. Crop improvement in Coleus forskohlii Briq. In : National seminar on transfer of technology of medicinal and aromatic crops, held on 20-22 February, Bangalore, pp. 92-96
Johnson, H.W., Robinson, H.F. and Comstock, R.E. 1955. Estimation of genetic variability in soybean. Agron.J., 47:314-318
Kavitha, C. 2005. Genetic diversity studies in Coleus forskohlii Briq. Ph.D thesis, TNAU, Coimbatore
Kokate, C.K., Prohit, A.P. and Gokhale, S.B. 2001. Pharmacognosy, Nirali Prakasam Publ., Warangal, India.
Maurya, K.R., Kumar, R., De, N. and Singh, S.N. 1998. Correlation and path analysis performance studies of some turmeric (Curcuma domestica Val.) genotypes. In: National Seminar on recent development in spices production technology, Bihar Agricultural College, Sabour. pp. 11-12
Mersinger, R., Donauer, H. and Rainhard, E. 1988. Formation of forskolin by suspension cultures of Coleus forskohlii. Planta Med., 54:200-204
Nandi, A., Lenka, D. and Singh, D.N. 1992. Path analysis in turmeric. Ind. Cocoa, Arecanut and Spices J.,17:54-55
Prabhakar, M., Singh, J. and Srivastava, L.J. 1994. Genetic variation and correlation studies for some important characters associated with solasodine yield in Solanum khasianum Clarke. Ind. J. Forestry, 17:26-31
Rajamani, K. 2003. Cultivation technology of Coleus forskohlii. In: State level sem. Medicinal Plants, held at Trichy, pp: 53-58
Rupp, R.H., De Souza, N.J. and Dohadwalla, A.N. 1986. In: Proceedings of the International Symposium on Forskolin: Its chemical, biological and medical potential. Hoechst India Ltd., Bombay, pp. 19-30
Shanmugasundaram, K.A. 1998. Evaluation and selection for certain quantitative and qualitative characters in turmeric (Curcuma domestica Val.). M.Sc. (Ag.) thesis, TNAU, Coimbatore
Snedecor, G.W. and Cochran, C.W.G. 1967. Statistical methods. The Iowa State University Press, Iowa, U.S.A.
Srivastava, A. and Chauhan, K.C. 1998. Path coefficient analysis between shoot dry weight and other characters in Bauhinia variegata Linn. progeny. J.Tree Sci., 15:111-113
Ushanandhinidevi, H. 2004. Induction of mutagenesis in turmeric (Curcuma longa L.) through gamma rays for variability and quality improvement. Ph.D thesis, TNAU, Coimbatore
Vishwanathan, T.V., Sunil, K.P. and Sujatha, R. 1993. Path analysis for lethality in gamma irradiated population of Indian liquorice (Abrus precatorius L.) South Ind. Hort., 41:101-105
Wright, S. 1921. Correlation and causation. J. Agril. Res., 20:557-585
Downloads
Published
Issue
Section
License
Copyright (c) 2009 M Velmurugan, K Rajamani, P Paramaguru, R Gnanam, J R Kannan Bapu (Author)
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Authors retain copyright. Articles published are made available as open access articles, distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited. 
This journal permits and encourages authors to share their submitted versions (preprints), accepted versions (postprints) and/or published versions (publisher versions) freely under the CC BY-NC-SA 4.0 license while providing bibliographic details that credit, if applicable.
How to Cite
. 
