Summary
Improved crop varieties developed at experimental stations are intended for release for production in farmers' fields which are not necessarily the test sites. Therefore, it is important to measure the inter-site transferability of the crop variety. This study was undertaken to establish a statistical measure of inter-site transferability of a variety. Data on grain yield from two sets of multi-locational trials on barley and four sets of the wheat trials conducted by the Cereal Program, International Center for Agricultural Research in the Dry Areas, Syria, were analyzed to evaluate the inter-site transferability of the varieties. Genotype × environment interaction was significant and experimental errors were heterogeneous in each set of trials. Correlations between the slope (of linear regression of variety mean on location mean) and variety mean were significant (P < 0.01) in all trials. Correlations between the developed inter-site transferability statistic and the variety mean were significant (P < 0.05) in only two trials. Correlations between mean yield and probability of the inter-site transferability statistic were insignificant in all trials. The inter-site transferability statistic and the associated probability of the transferability may be used to select varieties which are high yielding as well as transferable to a new environment. The strong association of slope with mean yield restricted the scope of varietal selection but the introduced statistic did not suffer from this drawback.
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References
Byth, D.E., R.L. Eisemann & I.H. DeLacy, 1976. Two-way pattern analysis of a large data set to evaluate genotypic adaptation. Heredity 37 (2): 215–230.
Chatterjee, S. & A.S. Hadi, 1988. Sensitivity Analysis in Linear Regression, John Wiley & Sons, New York.
Cook, R.D. & S. Weisberg, 1982. Residuals and Influence in Regression. Chapman & Hall, New York.
Digby, P.G.N., 1979. Modified joint regression analysis for incomplete variety × environment data. J. Agric. Sci. (Cambridge) 93: 81–86.
Eberhart, S.A. & W.A. Russell, 1966. Stability parameters for comparing varieties. Crop. Sci. 6: 36–40.
Finlay, K.W. & G.N. Wilkinson, 1963. Analysis of adaptation in a plant breeding programme. Aust. J. Agric. Res. 14: 742–754.
Freeman, G.H., 1973. Statistical methods for the analysis of genotype-environment interactions. Heredity 31: 339–354.
Freeman, G.H. & P. Crisp, 1979. Use of related variables in explaining genotype-environment interactions. Heredity 42(2): 1–11.
Gardner, M.J., 1972. On using an estimated regression line in a second sample. Biometrika 59: 263–274.
Hinkelmann, K.H. & M. Singh, 1989. Genotype-environment interaction: Aspects of statistical design, analysis and interpretation. Technical Report Number 89-10. Department of Statistics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA. 52 pp.
ICARDA, 1986a. Annual report for the regional bread wheat yield trails and observation nurseries 1984–85. Cereal Improvement Program. ICARDA, Aleppo, Syria.
ICARDA, 1986b. Annual report for the regional durum wheat yield trials and observation nurseries 1984–85. Cereal Improvement Program. ICARDA, Aleppo, Syria.
ICARDA, 1987a. Annual report for the regional bread wheat yield trials and observation nurseries 1985–86. Cereal Improvement Program. ICARDA, Aleppo, Syria.
ICARDA, 1987b. Annual report for the regional durum wheat yield trials and observation nurseries 1985–86. Cereal Improvement Program. ICARDA, Aleppo, Syria.
ICARDA, 1993. Annual report for the international barley nurseries 1991–92. Cereal Improvement Program. ICARDA, Aleppo, Syria.
Imhof, J.P., 1961. Computing the distribution of quadratic forms in normal variables. Biometrika 48: 419–426.
Lin, C.S., M.R. Binns & L.P. Lefkovitch, 1986. Stability analysis: Where do we stand? Crop Sci. 26: 894–900.
Mather, K. & P.D.S. Caligari, 1974. Genotype × environment interactions. I. Regression of interaction on overall effect of the environment. Heredity 33: 43–59.
Perkins, J.M. & J.L. Jinks, 1968. Environmental and genotype environmental components of variability. III. Multiple lines and crosses. Heredity 23: 239–256.
Westcott, B., 1986. Some methods of analyzing genotype-environment interaction. Heredity 56(2): 243–253.
Wood, C.L. & F.B. Cady, 1981. Intersite transfer of estimated response surfaces. Biometrics 37: 1–10.
Yates, F. & W.G. Cochran, 1938. The analysis of groups of experiments. J. Agric. Sci. 28: 556–580.
Yau, S.K., G. Ortiz-Ferrara & J.P. Srivastava, 1991. Classification of diverse bread wheat-growing environments based on differential yield responses. Crop Sci. 31: 571–576.
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Singh, M., Yau, S.K., Hamblin, J. et al. Inter-site transferability of crop varieties: another approach for analyzing multi-locational variety trials. Euphytica 89, 305–311 (1996). https://doi.org/10.1007/BF00022286
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DOI: https://doi.org/10.1007/BF00022286