International Journal of Plant Breeding and Genetics1819-35952152-3347Academic Journals Inc.10.3923/ijpbg.2008.51.63AsfawA. AssefaT. AmsaluB. NegashK. AlemayehuF. GurumF. RezeneY. FinenissaC. AtnafiMulugeta DabaChemeda 2200822Different stability analyses ranging from univariate
nonparametric to multivariate parametric methods were employed in this
study for the assessment of stability and adaptability of genotypes and
evaluation of test locations for their discrimitiveness and representativeness.
Replicated grain yield data of 16 elite small red bean genotypes tested
in national variety trials at nine locations representing major bean production
environments in Ethiopia for two years were used for the analysis. The
results from the analysis revealed presence of cross over genotype x location
interactions. The magnitude of location x year interaction indicated considerable
intra-location variation in genotypic response pattern over years. The
observed inter and intra-locations variation in genotypic response complicated
the identification of high yielding stable genotypes across locations
with both parametric and nonparametric stability estimates. However, with
genotype plus genotypexlocation interaction (GGL) biplots of the site
regression (SREG) model analysis, the overall picture of the genotypes
at different locations and testing ability of the locations were assessed.]]>Abou-El-Fittouh, H.A., J.O. Rawlings and P.A. Miller,19699377381Ebdon, J.S. and H.G. Gauch,200242489496Eberhart, S.A. and W.A. Russell, 196663640Ferreira, D.F., C.G.B. Demetrio, B.F.J. Manly, A.D.A. Machado and R. Vencovsky,200612373388Flores, F., M.T. Moreno and J.I. Cubero,199856271286Fox, P.N. and A.A. Rosielle, 198231645656Fox, P.N., B. Skovmand, B.K. Thompson, H.J. Braun and R. Cormier,1990475764Francis, T.R. and L.W. Kannenberg,19785810291034Gebeyehu, S. and H. Assefa,20031117Hussein, M.A., A. Bjornstad and A.H. Aastveit,200092454459Kang, M.S. and H.N. Pham,199183161165Lin, C.S. and M.R. Binns,198868193198Lin, C.S. and M.R. Binns,198876425430Nassar, R. and M. Huhn,1987434553Pinthus, M.J.,197322121123Shukla, G.K.,197229237245Tai, G.C.C., 197111184190Wricke, G.,196452127138Yan, W.,200294990996Yan, W. and I. Rajcan,2002421120Yan, W., M.S. Kang, B. Ma, S. Woods and P.L. Cornelius,200747643653Zobel, R.W., M.J. Wright and H.G. Gauch,198880388393Yan, W., L.A. Hunt, Q. Sheng and Z. Szlavnics,200040597605