Morpho-Agronomical Characterization of Taro (Colocasia esculenta) Accessions in Ethiopia
Volume 1, Issue 1, March 2013, Pages: 1-9
Received: Jan. 6, 2013; Published: Mar. 10, 2013
Views 3796      Downloads 350
Tewodros Mulualem Beyene, Jimma Agricultural Research Centre, Department of Root, Fruit and Vegetables Crops Research, P.O.Box, 192, Jimma, Ethiopia
Article Tools
Follow on us
One hundred accessions of taro (Colocasia esculenta) were tested at Jimma Agricultural Research Center dur-ing the 2011 growing season by using 10 x10 simple lattice design with two replications. The objectives of the study were to assess the nature and extent of diversity with in collected accessions based on key morphological descriptors and evaluate the accessions based on yield and yield related traits. Data on 17 qualitative and 13 quantitative traits were measured. Both sets of data collected were subjected to multivariate analysis using principal component (PCA), cluster analysis and of analysis of variance to determine the variability among accessions. The results of PCA based on qualitative traits reveled that characters have large contribution to the variability. The two-dimensional plot of the first two PCs showed a separation between accessions of big sized. Cluster analysis based on qualitative characters indicated the formation of seven clusters and existence of variability, based on their foliar and subterranean traits. Shannon-Weaver diversity index (H=0.27) showed that low levels of diversity existed among 100 C. esculenta based on the frequency of phenotypic characters that were considered. The analysis of variance for quantitative traits showed that number of active leaves/plant, petiole length and maximum horizontal distance highly significance differences exists for majority of characters studied and also path coefficient analysis at genotypic level showed that there are a number of characters exerting a maximum direct positive effect on fresh tuber yield suggesting that these characters are good contribution to the fresh root yield in taro. Overall, this study indicated that taro accessions collected from south and southwestern Ethiopia have an enormous wealth of traits variation for qualitative and quantitative characters, indicating huge potential for its genetic improvements through selection and hybridization. Therefore, selections based on these characters are efficient to maximize the fresh root yield and the genetic improvement of the crop.
Cluster, Genetic Diversity, Principal Component, Taro
To cite this article
Tewodros Mulualem Beyene, Morpho-Agronomical Characterization of Taro (Colocasia esculenta) Accessions in Ethiopia, Plant. Vol. 1, No. 1, 2013, pp. 1-9. doi: 10.11648/j.plant.20130101.11
Amsalu Nebiyu. 2003.Characterization and divergence analysis in cassava (Manihot esculenta Cranz) Genotypes at Jimma. MSc thesis, Alemaya University, Ethiopia.
Tewodros Mulualem. 2011. Exploiting indigenous know-ledge for selection and classification of Aerial yam (Dioscorea bulbifera( L.)) accessions in south and southwestern Ethiopia. Presented the 14 th Crop Science Socity of Ethiopia, 28-29 April, 2011, Addis Ababa, Ethiopia.
Edossa Etissa. 1996. Root and Tuber Crops: Potential as food crops in the humid areas of Ethiopia. In: IAR News letter of Agric. Res. 2 (1). IAR, A.A, Ethiopia
Edwards SB. 1991. Crops with wild relatives found in Ethi-opia. In: Engles JMM,
Tewodros Mulualem. 2008. Morphological characterization and preliminary evaluation of Aerial yam (Dioscorea bulbifera) collected from south and south-western Ethiopia. MSc thesis, Awassa University, Ethiopia.
IPGRI/IITA. 1999. Descriptors for taro (Collocasia spp.). International Institute for Tropical Agriculture, Ibadan, Ni-geria / International Plant Genetic Resources Institute, Rome, Italy.
Gomez K.A., and A.A. Gomez. 1984. Statistical Procedures for Agricultural Research. 2nd ed. John Wiley and Sons., inc., New York. 680 pp.
SAS Institute 2008. Statistical Analytical Systems SAS / STAT user’s guide version 9(1) cary NC :SAS institute inc.
Allard R.W. 1960. Principles of Plant Breeding. John Wiley and Sons Inc. New York. 485 p.
Dewey D.R. and Lu, K. H. 1959. A correlation and path coefficients analysis of components of crested wheat grass seed production. Agron. J., 51:515-518.
Mahalanobis, P.C. On the Generalized Distance in Statistics. Proc. Natl. Scence. India B. 2: 49- 55, 1936.
Yared Dagne. 2007. 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, Hawassa University, Awassa.
Muluneh Tamiru. 2006. Assessing diversity in yam (Diosco-rea spp.) from Ethiopia based on morphology, AFLP marker and tuber quality, and farmers’ management of landraces. Ph.D. thesis, George –August University. Germany.
Asfaw K. 2006. Characterization and divergence analysis of some Ethiopian taro (Collocasia esculenta (L.) accessions M.Sc thesis, Alemaya University, Ethiopia.
Woyessa Garedew. 2006. Morphological characterization and divergence analysis of Plectranthus edulis (Vatke) Agnew collection in Ethiopia. M.Sc. thesis, Presented to School of Graduate Studies, Hawassa University, Awassa.
Rubaihayo P.R., Whyte J.B.A., Dixon, A.G.O., Osiru, D.S.O. 2001.Inter- relationships among traits and path analysis for yield components of cassava: a search for storage root yield indicators, African crop science, J. 9(4).
Pandey S.K., Singh S.V. and Manivel, P. 2005. Genetic va-riability and causal relationship over seasons in potato. Crop Res. 29(2), 277-281.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186