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Using the F₃ generation for predicting the breeding potential of soybean crosses

Claudia Triller; José Francisco Ferraz de Toledo

Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Centro Nacional de Pesquisa de Soja (CNPSo), Caixa Postal 231, 86001/970 Londrina, PR, Brasil. Send correspondence to J.F.F.T.

ABSTRACT

The prediction of the genetic potential of crosses for generating inbred lines scoring either above or below given standards can be obtained from the F₃ means and the variances among the F₃ families. The methodology was tested for two soybean (Glycine max L. Merrill) traits: a) plant height at maturity, of moderate to high heritability and b) grain yield, of low heritability. The predictions were helpful for screening among crosses regardless of the inheritance of the trait in the absence of genotype x environmental (g x e) effects. In the presence of g x e, the use of two standards and of data from two environments improved the yield predictions.

Keywords: breeding potential; soybean crosses.

REFERENCES

Alliprandini, L.F., Toledo, J.F.F., Fonseca Jr., N.F., Almeida, L.A. and Kiihl, R.A.S. (1994). Efeitos da interação genotipo x ambiente sobre a produtividade da soja no Estado do Paraná. Pesq. Agropec. Bras. 29: 1433-1444.

Caligari, P.D.S., Powell, W. and Jinks, J.L. (1985). The use of double haploids in barley breeding. 2. An assessment of univariate cross prediction methods. Heredity 54: 353-358.

EMBRAPA (1994). Recomendações Técnicas para a Cultura da Soja no Paraná, 1994/95. Boletim Técnico No. 79, Londrina, PR, pp. 61-88.

Hartwig, E.E. and Kiihl, R.A.S. (1979). Identification and utilization of a delayed flowering character in soybean for short day condition. Field Crops Res. 2: 145-151.

Jinks, J.L. and Pooni, H.S. (1976). Predicting the properties of recombinant inbred lines derived by single seed descent. Heredity 36: 253-266.

Jinks, J.L. and Pooni, H.S. (1980). Comparing prediction of mean performance and environmental sensitivity of recombinant inbred lines based upon F₃ and triple test cross families. Heredity 45: 305-312.

Mather, K. and Jinks, J.L. (1982). Biometrical Genetics. 3rd edn. Chapman and Hall, London, pp. 396.

Ooij en, J.W. Van (1989a). The predictive value of quantitative genetic parameters in autogamous crops: bias caused by intergenotypic competition. 1. F∞-mean. Euphytica 44: 81-94.

Ooijen, J.W. Van (1989b). The predictive value of quantitative genetic parameters in autogamous crops: bias caused by intergenotypic competition. 2. F∞-variance. Euphytica 44: 95-108.

Pooni, H.S. and Jinks, J.L. (1981). Sources of predictions and their reliability in predicting the properties of recombinant inbred lines which can be obtained from a cross by single seed descent. Proceedings of the Fourth International Barley Genetics Symposium. Edinburgh, Scotland. pp. 73-78.

Snedecor, G.W. and Cochran, W.G. (1967). Statistical Methods. The Iowa State University Press, Ames, Iowa, pp. 593.

Tapsell, C.R. and Thomas, W.T.B. (1983). Cross prediction studies on spring barley. 2. Estimation of genetical and environmental control of yield and its component characters. Theor. Appl. Genet. 64: 353-358.

Toledo, J.F.F. (1986). Biometrical studies of inbred lines and their hybrids. Doctoral thesis, University of Birmingham, Birmingham.

Toledo, J.F.F. (1987). Predicting the inbreeding and the outcrossing potential of soybean [Glycine max (L.) Merrill] varieties. Braz. J. Genet. 10: 543-558.

Toledo, J.F.F. (1989). Quantitative genetics in soybean breeding. In: World Soybean Research Conference. IV (Pascale, A.J., ed.). Soybean Association of Argentina, Buenos Aires, pp. 909-914.

Toledo, J.F.F., Rossini, M.C., Souza, R.F. and Leão, F.F. (1991). Genetical analysis of a soybean biparental cross and comparative model fitting to means and variances of two sets of generations. Braz. J. Genet. 14: 1041-1064.

Triller, C. (1994). Previsão do potencial genético de cruzamentos em soja pela geração F₃. Master's thesis. Universidade Estadual de Londrina, Londrina, PR, Brazil.