Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2008.1791.1796FarshadfarE. 1220081114In order to determine stable bread wheat genotypes with
high grain yield via a single parameter, field experiments were conducted
with 20 genotypes for 4 consecutive years in two different conditions
(irrigated and rainfed) in a completely randomized block design with three
replications in each environment. Combined analysis of variance showed
highly significant differences for the GE interaction indicating the possibility
of selection for stable entries. The results of additive main effect and
multiplicative interaction (AMMI) analysis revealed 10% of total variability
was justified by the GE interaction which was 2.5 times more than that
of genotypes. Ordination techniques displayed high differences for the
interaction principal components (IPC1, IPC2 and IPC3), exhibiting that
83% of the GE sum of squares was justified by AMMI1, AMMI2 and AMMI3,
i.e., 3.77 times more than that explained by the linear regression model
displaying the relative efficiency of AMMI1 model in comparison with regression
model. AMMI stability value (ASV) discriminated genotypes G6, G9, G14,
G15, G17 and G18 as the stable entries. As stability per se is not a desirable
selection criterion, because the most stable genotypes would not necessarily
give the best yield performance, hence, simultaneous consideration of
grain yield and ASV in a single non-parametric index entitled: Genotype
Selection Index (GSI), discriminated G6 and G17 with general adaptability
and high grain yield for rainfed and irrigated conditions which was in
agreement with the results of biplot analysis.]]>Alagarswamy, G. and S. Chandra,199896397405Asenjo, C.A., R. Benzus and H. Acciaresi,2003Oriza sativa L.) in temperate region using the joint regression analysis and AMMI methods.]]>3197104Basford, K.E., W.T. Federer and I.H. Delacy,200496143147Crossa, J., P.N. Fox, W.H. Pfeiffer, S. Rajaram and H.G. Gauch Jr.,1991812737Eberhart, S.A. and W.A. Russell, 196663640Farshadfar, E.,19981st Edn.Farshadfar, E., M. farshadfar and J. Sutka,199947109116Farshadfar, E. and J. Sutka,200331249254Farshadfar, E. and J. Sutka,200654459467Finlay, K.W. and G.N. Wilkinson,196314742754Gabriel, K.R.,197158453467Gauch Jr., H.G. and R.W. Zobel,198977443481Gauch, H.G.,19921st Edn.Hayward, M.D., N.O. Bosemard and L. Romagosa,19931st Edn.Gauch, Jr. H.G.,198844705715Kang, M.S.,199119361366Kang, M.S.,199385754757Manrique, K. and H. Hermann,2000119281286Mohammadi, R. and A. Amri,2008159419432Mohammadi, R., M. Armion, A. Shabani and A. Daryaei,2007612611268Mohammadi, R., R. Haghparast, M. Aghaee and M. Rostaee,200733170178Mohammadi, R., R. Haghparast20073475480De Oliveira, E.J. and I.J. de Godoy,20066311317Oritza, R., W.W. Wagorie, J. Hill, S. Chandra, S. Madsen and O. Stolen,2001103469474Pourdad, S.S. and R. Mohammadi,20087100104Purchase, J.L., H. Hatting and C.S. van Denventer,2000Triticum aestivum L.) in South Africa: II. Stability analysis of yield performance.]]>17101107Sharma, R.C., G. Ortiz-Ferrara, J. Crossa, M.R. Bhatta and M.A. Sufian et al.,2007157457464Snedecor, G.W. and W.G. Cochran,19898th Edn.,Pages: 524Pages: 524Solomon, A., M. Nigussie and H. Zelleke,2008zea mays L.) in Ethiopia.]]>7163169Tabachnick, B.G. and L.S. Fidel,20071st Edn.Tarakanovas, P. and V. Rusgas,200649198Thamson, W.E. and S.B. Philips,2006998795Vergas, M., J. Crossa., F.V. Eeuwijk, K.D. Sayre and M.P. Reynolds,200193949960Wade, L.J., S. Sarkarung, C.G. Melran, A. Guhey and B. Quader et al.,19951st Edn.,pp: 883-900pp: 883-900Yan, W., L.A. Hunt, Q. Sheng and Z. Szlavnics,200040597605Yan, W. and L.A. Hunt,2001411925Zobel, R.W., M.J. Wright and H.G. Gauch,198880388393