COMPARISON OF STABILITY MODELS IN MULTI-ENVIRONMENT RICE TRIALS IN THE SOMALI REGIONAL STATE OF ETHIOPIA
Abstract
Twelve upland rice varieties, deemed NERICA (Oryza sativa x O. glaberrima) were planted at three locations of the Somali Regional State
of Ethiopia in April 2010 with the objective of identifying the most stable varieties and suitable stability models. Data were collected on eight yield and yield-related phenological and agronomic traits. The analysis of variance across locations for grain yield indicated that genotypic variations were
highly significant to significant in all locations. The combined analysis of variance using Analysis of Variance (ANOVA) indicated that location,
genotype, and genotype x location (G x L) mean squares were highly significant. The six stability models considered in the experiment (ANOVA,
Eberhart and Russell, Additive Main Effects and Multiplicative Interactions (AMMI), Wricke’s ecovalence; Nassar and Hühn’s; and Shukla’s) identified
different genotype(s) to be the most stable ones. On the other hand, comparison among the stability models using the criteria of Zobel et al.
(1988) and Spearman’s rank correlation coefficients indicated, AMMI and Eberhart and Russell’s model outsmarted ANOVA and AMMI’s Interaction
Principal Component Axis (IPCA); Wricke’s ecovalence (W i ); Nassar and Hühn’s absolute rank difference (S 1 ); and Shukla’s stability variance (σ i2 )
were in best correspondence with the ranking of the genotypes, respectively.
Downloads
References
Aina, O.O., Dixon, A.G.O. and Akrinide, E.A. (2007). Additive main effects and multiplicative interactions analysis for yield of cassava in Nigeria. J. Biol. Sci. 7 :796-800.
Alberts, M.J.A. (2004). A comparison of statistical methods to describe genotype x environment interaction and yield stability in multi-location maize trials. M. Sc. Thesis, University of the Free State, South Africa.
Anandan, A. and Eswaran, R. (2006). Genotype by environment interactions of rice ( Oryza sativa L.) hybrids in the east coast saline region of Tamil Nadu. In: The Proceedings of 2 nd International Rice Congress , pp. 2-26, New Delhi, India.
Asrat Asfaw, Fistum Alemayehu, Fekadu Gurum and Mulugeta Atnaf (2009). AMMI and SREG GGE biplot analysis for matching varieties onto soybean production environments in Ethiopia. Sci. Res. Essays 4 : 1322-1330.
Ebdon, J.S. and Gauch, H.G. (2002). Additive main effect and multiplicative interaction analysis of national turf grass performance trials: I. Interpretation of genotype x environment interaction. Crop Sci. 42 : 489-496.
Eberhart, S.A. and Russell, W.A. (1966). Stability parameters for comparing varieties. Crop Sci . 6 : 36-40.
Francis, T.R. and Kannenberg, L.W. (1978). Yield stability studies in short-season maize. I.A descriptive method for grouping genotypes. Can. J. Plant Sci. 58 : 1029-1034.
Ministry of Agriculture and Rural Development (MOARD) (2010). National Rice Research and Development Strategy of Ethiopia, pp. 11-12, Addis Ababa, Ethiopia.
Misra, R.C., Das, S. and Patnaik, M.C. (2009). AMMI model analysis of stability and adaptability of late duration finger millet ( Eleusine coracana ) genotypes. World Appl. Sci. J. 6 : 1650-1654.
Navabi, A., Yang, R.C., Helm, J. and Spawer, D.M. (2006). Can spring wheat growing mega-environments in the northern great plain be dissected for representative locations or niche-adapted genotypes? Crop Sci. 46 : 1107-1116.
Shukla, G.K. (1972). Some statistical aspects of partitioning genotype-environmental components of variability. Heredity 29 : 237-245.
Somali Region Pastoral and Agro-pastoral Research Institute (SoRPARI) (2009). Annual Report, Jijiga, Ethiopia.
Steel, R. G. and Torrie, J. H. (1980). Principles and Procedures of Statistics . McGraw-Hill, New York.
Vange, T. and Obi, I.U. (2005). Yield stability and environmental responses of some improved upland rice (NERICA) lines in the Southern Guinea savanna of Nigeria. Heredity 31 : 21-25.
Wricke, G. (1962). Über eine methode zur erfassung der ökologischen Streubreite in feldversuchen. Z. Pflanzenzüchtung . 47 : 92-96.
Wricke, G. (1964). Zur berechnung der ökovalenz bei sommerweizen und hafer. Z.Pflanzenzüchtung. 52 : 127-138.
Yang, S., Shen, X., Wang, L., and Xie, F. (1999). AMMI model analysis of regional trials on second cropping japonica rice varieties in Southern China. Jiaganso Agricultural Research 20 : 33-35.
Zobel, W.R., Wright, W.J. and Gauch (Jr.), J.H. (1988). Statistical analysis of a yield trial.Agron. J. 80 : 388-393.
