International Journal of Plant Breeding and Genetics1819-35952152-3347Academic Journals Inc.10.3923/ijpbg.2011.379.387OkoyeM.N. OkwuagwuC.O. UguruM.I. AtagaC.D. BaiyeriK.P. 4201154Several biometrical methods available for the analysis of gxe interaction and yield stability, often fail to provide an accurate picture of complete response pattern of the genotypes because the stability indices are usually univariate. The objective of this study was to examine the various statistical methods for stability analysis of bunch yield in order to determine their congruence in identification of stable oil palm genotype. Fifteen duraxtenera oil palm genotypes were evaluated for genotype by environment interaction (gxe) and yield stability across four environments. The five statistical methods examined are Eberhart and Russell joint linear regression (ER), Shukla’s Stability index (SH), Francis and Kanennberg genotype-grouping technique (FK), Lin and Binn’s cultivar superiority values (LB) and Yan’s Genotype and Genotype by Environment interaction model (GGE). Significant crossover gxe interaction was observed, suggesting specific adaptation. Spearman’s rank correlation coefficient between the stability parameters and environments indicated a weak relationship. However, SH was significantly correlated with ER and LB. The level of convergence between any two methods ranged from 25 to 67% while that among three, four or the five methods were between 29 to 57%. Two genotypes, DT7 and DT11 were identified as high yielding and stable by all methods. These genotypes would be reliable for future breeding programme to develop high yielding planting materials with stable performance. Furthermore, farmers will be assured of the yield from season to season. In most cases, genotypes selected by GGE were also classified as stable by the other four methods. Thus, simultaneous use of stability statistics would protect the breeder from making wrong selections.]]>Adugna, W. and M.T. Labuschagne,2003Linum usitatissimum L.).]]>Martin, J.A.A.,2004Asfaw, A., T. Assefa, B. Amsalu, K. Negash and F. Alemayehu et al.,2008Ataga, C.D.,2010Elaeis guineensis Jacq) using descriptive method of grouping genotypes.]]>Ataga, C.D.,1993Elaeis guiniensis Tacq.).]]>Baiyeri, K.P., B.N. Mbah and A. Tenkouano,1999Musa genotypes in Nigeria using four statistical methods.]]>Becker, H.C. and J. Leon,1988DeLacy, I.H., K.E. Basford, M. Cooper, J.K. Bull and C.G. McLaren,1996Eberhart, S.A. and W.A. Russell, 1966Evans, L.T., 1993Finlay, K.W. and G.N. Wilkinson,1963Francis, T.R. and L.W. Kannenberg,1978Gabriel, K.R.,1971Hassanpanah, D.,2010Hohls, T.,1995Huhn, M.,1996Papadopoulos, I.I., I.S. Tokatlidis, E.G, Tamoutsidis, M. Koutsika-Sotiriou and S. Koutroubas,2007Kevin, E.T., M. Kathleen, M. Linda and R. Steven,2000Kang, M.S. and H.G. Gauch,1996Lin, C.S., M.R. Binns and L.P. Lefkovitch,1986Lin, C.S. and M.R. Binns,1988Okoye, M.N.,2008Okoye, M.N., C.O. Okwuagwu and M.I. Uguru,2008Elaeis guineensis Jacq.).]]>Okoye, M.N.,2010 Okoye, M.N., C.O. Okwuagwu, M.I. Uguru and K.P. Baiyeri,2011Sreedhar, S., T.D. Reddy and M.S. Ramesha,2011Oryza sativa L.).]]>Shukla, G.K.,1972Steel, R.G.D. and J.H. Torrie,1980Truberg, B. and M. Huhn,2000Yan, W.,1999Yan, W.,2001Yan, W. and L.A. Hunt,2002Yan, W., L.A. Hunt, Q. Sheng and Z. Szlavnics,2000Yan, W. and M.S. Kang,2003Jalata, Z., 2011Hordeium vulgare L.) genotypes in Southeastern Ethiopia highlands.]]>Rafii, M.Y., N. Rajanaidu, B.S. Jalani and A.H. Zakeri,2001Elaeis guineensis Jacq.) progenies over six locations.]]>Crossa, J.,1990