Interrelationships of Sweet Potato Varieties and their Characters for Yield Determination

Birhanu Amare, Fetien Abay, Yemane Tsehaye


Seven sweet potato varieties were evaluated for their relationship (similarity and differences) in southern and eastern zones of Tigray, Ethiopia in 2012. Randomized complete block design with three replications was used for the experiment. Cluster analysis based on ward's method using Squared Euclidian distance was performed for clustering the varieties. Moreover, all characters were standardized before the distance matrix is done due to variables are in different units of characters and to minimize the effect of scale differences. The combined analysis of variance across locations showed significant variation among genotypes, locations and the genotypes by locations interaction..The superior mean total root yield (26.82 t/ha) was obtained at Kukufto testing location while the inferior yield (13.45 t/ha) was at Rarhe. Similarly, genotype LO gave the highest mean total root yield (30.9 t/ha), but bellela gave the lowest (7.78 t/ha). The AMMI analysis also showed highly significant difference for genotypes, locations and the genotypes by locations interaction. The genotype main effect contributed more to the total variability (54.1%) indicating that the variation was largely due to the inheritance of genotype effect. The genotype by location interaction was further partitioned using AMMI model and the first two principal components explained 100% of the total variability. AMMI biplot view of this study identified kukufto as best testing location and LO, Tulla and Kulfo as best genotypes for south and south east zones of Tigray region.


Characters; Sweet potato; Yield; Varieties.

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Woolfe, J.A., 1992. Sweetpotato an untapped food resource. Cambridge University Press,Cambridge, United Kingdom..

Manrique, K. and Hermann, M., 2000. Effect of G x E Interaction on Root Yield and Beta carotene Content of Selected Sweetpotato (Ipomoea batatas (L) Lam.) Varieties and Breeding Clones. CIP Program Report 1999 – 2000 CIP, Lima, Peru

Engida Tsegaye, Mihertu Cherinet, Asfaw Kifle, Daniel Mekonen & Tesfaye Tadesse (2009). Genotype x Environment Interactions and Yield Stability of Orange Fleshed Sweet potato Varieties Grown in Ethiopia. Tropical Roots and Tubers in a Changing Climate. A Critical Opportunity for the World. 2 -6 Nov 2009 Lima, Peru

Sabaghnia, N., Dehghani, H. and Sabaghpour, S.H. (2006). Non-parametric methods for interpreting GEI of Lentil genotypes. Crop Sci., 46: 1100-1106

Addis Abrha (2003). Genotype by Environment Interaction of Bread wheat Genotypes under Dry Land Growing Conditions of Tigray. Unpublished M.Sc. Thesis, Alemaya University, Alemaya, Ethiopia.

Scott, G.J., and Maldonado, L. (1998). Sweet potato for the new Millenium: trends in production and utilization in developing countries. CIP program report 1997-1998. CIP, Lima, Peru.

Moussa, S. A.M., Hala, A., EI-Aal, A. and EI – Fadi, N. A. (2011). Stability study of sweet potato yield and its component characters under different Environments by Joint Regression Analysis., Journal of Horticultural Science and Ornamental plants. 3 (1) pp. 43 – 54. Sadat Branch, Egypt

Gauch, H.G. and Zobel, R.W. (1996). Additive Main effects and Multiplicative Interaction analysis of yield trials. In: Kang, M.S. and Zobel, H.G. Jr (Eds.). Genotype by environment interaction. CRC Press, Boca Routon, Florida, pp. 85-120.

Das, S., Misra, R.C, and Patnaik, M.C. (2010). GxE Interaction, Adaptability and Yield Stability of Mid-Early Rice Genotypes. Indian J. Agric. Res., 44 (2). 104 – 111.

Misra, R.C., Das, S. and Patnaik, M.C. (2009). Additive Main effects and Multiplicative Interaction Model Analysis of Stability and Adaptability of Late Duration Finger Millet Genotypes. World Applied Sciences Journal 6 (12): 1650-1654, ISSN 1818-4952. Orissa University of Agriculture and Technology, Bhubaneswar-751 003, Orissa, India.

Gauch, H.G. and Zobel, R.W. (1988). Predictive and postdictive success of statistical analyses of yield trials. Theor. Appl. Genet. 76: 1-10.

Payne, R.W., Murray, D.A., Harding, S.A., Baird, D.B. and Soutar, D.M. (2007). GenStat for Windows ® (12th Edition) Introduction. VSN International, Hemel Hempstead, UK.

Gebru, H., H/Mariam, A. and Belay, T. ( 2011). Genotype by Environment interaction and grain yield stability of early maturing bread wheat (Triticum aestivum L) genotypes in the drought prone areas of Tigray region, Northern Ethiopia. EJAST 1(2):3-7

Ward, J. H. (1963). Hierarchical grouping to Optimise an objective junction. J. Am. Stat. Assoc. 58: 236-244

Diana, D. S. (1999). Principal Component Analysis vs. Exploratory Factor Analysis. Pp. 203-230, University of Northern Colorado

Yemane Tsehaye and Fassil Kebebew (2002). Morphological diversity and geographic distribution of adaptive traits in finger millet (Eleusine coracana (L.) Gaertn. Subsp. coracana [Poaceae]) populations from Ethiopia. Addis Ababa, Ethiopia

Ali, M. K., Akinci, C and Donmez, E. (2011). Assessment of genotype x environment interaction on yield and yield components of durum wheat genotypes by multivariate analyses. African Journal of Biotechnology. 10 (15), pp. 2875-2885, ISSN 1684-5315

Khodadadi, M., Fotokian, H. and Miransari, M. (2011). Genetic diversity of wheat (Triticum aestivum L.) genotypes based on cluster and principal component analyses for breeding strategies. Australian Journal of Crop Science. AJCS 5(1):17-24.

Mooi, E. and Sarstedt, M. (2011). A Concise Guide to Market Research: Cluster Analysis. pp. 237 – 275, DOI 10.1007/978-3-642-12541-6_9, Berlin Heidelberg.

Tesfaye Tadesse (2006). Evaluation of Root Yield and Carotene Content of Orange-Fleshed Sweet potato Clones across locations in Southern region of Ethiopia. Unpublished M.Sc. thesis, HAwassa University, Hawassa, Ethiopia.

Lowe, S.B. and Wilson, L.A. (1975b). Yield and yield components of six sweet potatoes cultivars. II- variability and possible sources of variation.

Islam, M.J., Haque, M.Z., Majumder, U.K., Haque, M.M. and Hossain, M.F. (2002). Growth and yield potential of nine selected genotypes of sweet potato. Pakistan Journal of Biological Sciences 5(5): 537-538.

Tumwegamire, S. (2011). Genetic Variation Diversity and Genotype by Environment Interactions of Nutritional Quality traits in East African Sweetpotato. ISBN 978-92-9060-408-2 .M.Sc. Agric. – Crop Science, B.Sc. Hons Agric. Makerere University, Kampala, Uganda

Afuape, S. O., Okocha, P. I. and Njoku, D. (2011). Multivariate assessment of the agromorphological variability and yield components among sweet potato (Ipomoea batatas (L.) Lam) landraces.. African Journal of Plant Science. 5(2), 123-132, Nigeria..

Ravi, V. (1997). Growth physiology of sweet potato. 3rd international training on sweet potato production. 23-29 September, 1979. Trinvadram, India, pp.28-41.

Yohannes Gedamu (2007). Analyses of Genotype x Environment Interaction and Trait Correlations in orange-fleshed sweet potato [Ipomoea batatas (l.) Lam.] Clones in Wollo. Unpublished MSc Thesis, Haramaya University, Alemaya, Ethiopia.

Kamalam, P., Biradar, R.S., Hrishi N. and Rajendran, P.G. (1977). Path analysis and correlation Studies in sweet potato (Ipomoea batatas Lam.). J. Root Crops 3(1): 5-11

Engida Tsegaye (2004). Variability and interrelationships among agronomic traits in sweet potato (Ipomoea batatas (L.) Lam). M.Sc. Thesis. Alemaya University of Agriculture, Alemaya, Ethiopia. pp 33 – 56.

. [29] Chandra, A. and Tiwari, J.P. (1987). Productivity potential of sweet potato (Ipomoea batatas) Poir. J. Root Crops 13(2): 95-101

Bhagsari, A. S., and Ashley, D. A. (1990). Relationship of Photosynthesis and Harvest Index to Sweet Potato Yield. J. AMER. Soc. HORT. SCI. 115(2):288-293. Georgia, Athens.

Thakur, S.R and Saini, J.P. (1995). Variation, association and path analysis in finger millet (Eleusine Ceracana) under moisture stress condition. Indian J. Agr. Sc. 65(1): 54-57

Chipungo, F.P., Issa, E. J., Moyo, C.C. and Benesi, J.R.M, (2000). Field Evaluation of Introduced Sweet potato Clones for Yield and Quality in Malawi.


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