Shankar Lal AHUJA, Laxman Singh DHAYAL, Ram PRAKASH

A Correlation and Path Coefficient Analysis of Components in G. hirsutum L. Hybrids by Usual and Fibre Quality Grouping

Improvement in fibre length is important for the textile industry in utilising high speed yarn spinning technology and in expanding the array of yarn products. High tensile strength fibre is needed for good spinning, especially with fast modern spinning machines. The usual practice of estimating correlation coefficients and the direct and indirect effects of component traits of seed cotton yield is without grouping the genetic material on the basis of fibre length and strength. Hence, the present investigation was carried out on these aspects by grouping the 20 F1 hybrids into 3 sets on the basis of fibre length and strength, viz, (i) 10 hybrids of low fibre strength (£20 g tex-1) and medium staple length (£25.0 mm), (ii) 10 hybrids of high fibre strength (>=24 g tex-1) and longer fibre length (>=28 mm), and (iv) 20 hybrids, i.e. all the 10 hybrids of set 1 and set 2 of Gossypium hirsutum L. cotton for agronomic and fibre quality traits. Significant genotypic difference existed among the hybrids in all the sets for all the characters studied. The direction of association coefficient of the traits and direct effects on seed cotton yield differed for all the traits except for the number of bolls per plant, boll weight and fibre strength in set 1 and set 2. Set 1 gave the same direction of association with seed cotton yield as obtained in set 3 of usual practice except for the traits ginning out turn (GOT) and days to flowering, whereas set 2 gave similar information to the usual practice for the traits days to flowering, total bolls, boll weight and GOT, and differed for other traits. The present study, therefore, indicates that the hybrid population needs to be grouped on the basis of fibre length and fibre strength prior to estimation of correlation coefficients and direct and indirect effects of other traits on seed cotton yield.

Anahtar Kelimeler:

Cotton, correlation coefficient, direct and indirect effects, fibre quality

A Correlation and Path Coefficient Analysis of Components in G. hirsutum L. Hybrids by Usual and Fibre Quality Grouping

Keywords:

Cotton, correlation coefficient, direct and indirect effects, fibre quality,

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Altaher, A.F. and R.P. Singh. 2003. Yield component analysis in upland cotton (Gossypium hirsutum L.). J. Indian Soc. Cotton Improv. 28: 151-157.
Amudha, K., T.S. Raveenderan and D. Krishadows. 1996. Path analysis in coloured linted cotton varieties. Madras Agric. J. 83: 693-696.
Choudhary, P.N., D.N. Bhorle, D. Patil and B.N. Narkhede. 1998. Path analysis in cotton. J. Maharashtra Agric. Univ. 13: 54-55.
Dedaniya, A.D. and K.V. Pethania. 1994. Genetic variability, correlations and path analysis in desi cotton. Indian J. Genet. 54: 229-234.
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.
Fisher, R.A. and F. Yates. 1938. Statistical Tables for Biological, Agricultural and Medical Research, 5 Aufl. Oliver and Boyd. Edinburgh.
Gite, V.K., M.B. Misal and H.V. Kalpande. 2006. Correlation and path analysis in cotton (Gossypium hirsutum L.). J. Cotton Res. Dev. 20: 51-54.
Gururajan, K.N. and S. Sunder. 2004. Yield component analysis in American cotton (Gossypium barbadense L). In: International Symposium on Strategies for Sustainable Cotton Production–A Global Vision. Crop Improvement, J. Indian Soc. Cotton Improv. 25: 17-22.3-25 Nov., University of Agricultural Sciences, Dharwad, Karnataka (India). pp-201-204.
Kaushik, S.K., C.J. Kapoor and N.R. Koli. 2003. Association and path analysis in American cotton (Gossypium hirsutum L.). J. Cotton. Res. Dev. 17: 24-26.
Mainimaran, R. 1999. Characterisation of cotton genotypes and cultivation of their heterotic potential. MSc (Ag) Thesis, T.N.A.U. Coimbatore, India.
Muthu, R., G. Kandasamy and M. Jayaramachandran. 2004. Correlation and path co-efficient analysis for yield and fibre quality traits in cotton (G. hirsutum L.). J. Indian Soc. Cotton Improv. 29: 17-20.
Panse, V.C. and P.V. Sukhatme. 1978. Statistical methods for Agricultural workers. III Rev. Ed. ICAR, New Delhi, India.
Rajarathinam, S., N. Nadarajan and S. Sukanya. 1993. Genetic variability and association analysis in upland cotton (Gossypium hirsutum L). J. Indian Soc. Cotton Improv. 18: 54-59.
Rao, G.N., M.S.S. Reddy and P. Shanthi. 2001. Correlation and path analysis of seed cotton yield and its components in cotton. J. Cotton Res. Dev. 15: 81-83.
Sambamurthy, J.S.V. and B. Rama Rao. 1998. Genetic variability and association analysis in parents and hybrids of American cotton. J. Cotton Res. Dev. 12: 236-241.
Sambamurthy, J.S.V., D.M. Reddy and K.H.G. Reddy. 1995. Genetic variability, correlation and path analysis in cotton. J. Indian Soc. Cotton Improv. 20: 133-137.
Singh, R.K. and B.D. Chaudhary. 1985. Biometrical Methods in Quantitative Genetic Analysis. Kalayani Publisher, New Delhi (India).
Singh, R.K. and S.N. Kakar, 1977. Control on individual trait means during index selection. Proc. Third Cong. SABRAO (Canberra), III Ed, pp. 22-25.
Valarmathi, M. 1996. Genetic studies on yield components and fibre characters in intra specific and interspecific hybrids of cotton. MSc (Ag) Thesis, T.N.A.U. Coimbatore, India.