Volume 1, Issue 3, October 2013, Page: 33-38
Studies on Correlation and Path Analysis for Root Yield and Related Traits of Cassava (Manihot Esculenta Crantz) in South Ethiopia
Tewodros Mulualem, Roots, Fruits and Vegetable case team, Jimma Agricultural Research Center, Po, Box 192, Jimma, Ethiopia
Yared Dagne, Areka Agricultural Research Center, Po, Box 79, Areka, Ethiopia
Received: Sep. 23, 2013;       Published: Oct. 30, 2013
DOI: 10.11648/j.jps.20130103.13      View  3301      Downloads  182
Ten promising and one respective local check of cassava (Manihot esculenta Crantz) genotypes were tested at Areka, Bele and Goffa districts of southern Ethiopia during 2006-2007 growing seasons using RCBD with three replications. The objectives of the study were to examine the interrelationship of yield related characters and extent of their contribution to fresh root yield on cassava. The genotypic correlation between fresh root yield and number of vertical stem/plant, root girth, root diameter, weight of above ground plant parts and root dry weight was highly significant, while positive and significant phenotypic correlation was observed between root fresh yield plot and root girth, root length and diameter. Among these characters, roots diameter reflected the highest direct effect of (p=1.976) towards root fresh weight; while minimum was indicated by number of branches/plant (p=0.004). Number of vertical stem/plant, stem girth, weight of above ground plant parts and root dry weight had contribute to the root fresh weight. Therefore indirect selection for higher fresh root yield may be effective for improving these characters. This study suggests the relative higher value of residual effect (0.364) indicated more yield components should be considered in the future to account for the variation in cassava root yield.
Cassava, Correlation, Direct Effect, Path Coefficient
To cite this article
Tewodros Mulualem, Yared Dagne, Studies on Correlation and Path Analysis for Root Yield and Related Traits of Cassava (Manihot Esculenta Crantz) in South Ethiopia, Journal of Plant Sciences. Vol. 1, No. 3, 2013, pp. 33-38. doi: 10.11648/j.jps.20130103.13
Tewodros Mulualem Production, Storage and post-harvest utilization system of cassava (Manihot esculenta). Lambert Acadamic Publishing: ISBN No. 978-3-659-20833-1 2012.
FAO, Tropical root and tuber crops, Production, Perspective and Future prospects. FAO Plant production and Protection Paper 126, ISSN 0259-2517. Rome Itali 1998..
Anonymous,. Under exploited Tropical plants with promising economic value. National academic sciences, pp. 189. Washington D.C 1975.
Anna B., Roslyn G, and Julie C, Cassava: The drought,War and Famine Crop a Changing world, Sustainability Journal, ISSN 2071-1050, pp.3572-3573 2010.
Kawano, K, Yield improvement in multistage breeding programme for cassava. Crop Science 38: 325-332 1998.
Kang, Applied quantitative genetics. Department of Agronomy,Louisiana State University, Baton Rouge, LA 70803-2111, USA 1994.
Agedew Bekele, Genetic variability and association among yield and yield related traits in soybean (Glycine max (L.) Merrill) at Awassa and Gofa, Southern Region. M.Sc thesis, Alemaya University, Alemaya, Ethiopia 2006.
Tewodros Mulualem and Biruke Ayenew, Cassava (Mannihot esculenta Cranz) Varieties and Harvesting Stages Influenced Yield and Yield Related Components. IISTE, Journal of Natural Science Research, ISSN: 2224- 3186(Paper), ISSN 2225-0921(Online), Vol. 2. No. 10, 2012, pp. 122-128 2012.
. IPGRI, Bioversity Technical bulletin. No. 13. Developing crop descriptor list. 1996.
Johonson, H.W., H.F. Robinson and R.E. Comostock. Estimates of Genetics and Environmental Variability in Soybeans Agron. J. 47, 314-318 1955a..
Miller, P. A, Williams, J. C, Robinson, HF. and Comstock, R.F, Estimation of genetic and environmental variances and their implications in selections. Agronomy journal, 50, 126-131, 1958.
Singh, R.K, and B.D. Chaudhury, Biometrical Methods in Quantitative Genetic Analysis. Kalyani Publishers, New Delhi. 318 p. 1985.
SAS Statistical Analytical Systems SAS / STAT User’s Guide Version 8(2) cary NC :SAS Institute inc. ,1999.
Robertson, G.R..The sampling variances of the genetic correlation coefficients. Biometrics, 15, 469-485 1959.
Dewey, D.R. and Lu, K. H.. Correlation and Path Coefficients Analysis of Components of Crested Wheat Grass Seed Production. Agron. J., 51:515-518, 1959.
Asfaw, K. Characterization and Divergence Analysis of Some Ethiopian Taro (Collocasia esculenta (L.) Genotypes M.Sc thesis, Alemaya University, Ethiopia 2006.
Yared Dagne, Studies on indigenous production and evaluation of landrace taro clones (Colocasia esculenta L. (Schott) at Dalbo watershed, Wolaita, South Ethiopia. M.Sc. thesis, Presented to School of Graduate Studies, Aawassa University, Awassa, Ethiopia, 2007.
Tewodros Mulualem, Morphological characterization and preliminary evaluation of Aerial yam (Dioscorea bulbifera) collected from south and south-western Ethiopia. MSc thesis, Awassa University, Awassa, Ethiopia,, 2008.
Bemnnet M, Getnet A. and Buzuayehu T, Correlation studies and path coefficient analysis for seed yield and yield components in Ethiopian Coriander accessions, African crop Science journal. Vol.21.No.1 pp.51-59 2013.
Adam, A, Evaluation of Ethiopian black cumin (Nigella sativa L.) landraces for agronomic characters and oil contents at Adet and Wereta, NorthWest Ethiopia. MSc thesis, Alemaya University, Alemaya, Ethiopia, 2006.
Woyessa Garedew, Morphological Characterization and Divergence Analysis of Plectranthus edulis (Vatke) Agnew Collection in Ethiopia. M.Sc. thesis, Aawassa University, Awassa, Ethiopia, 2006.
Amsalu, Nebiyu, Characterization and Divergence Analysis in Cassava (Manihot esculenta Cranz) Genotypes at Jimma. MSc thesis, Alemaya University, Ethiopia, 2003.
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