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Efficiency of simultaneous selection of lowland rice (Oryza sativa L.) with and without controlled irrigation*

 

 

Paulo Hideo Nakano RangelI; Roland VencovskyII; Cosme Damião CruzIII; Reinaldo de Paula FerreiraI

IEMBRAPA-CNPAF, Caixa Postal 179, 74001 Goiânia, GO, Brasil. Send correspondence to P.H.N.R.
IIDepartamento de Genética, ESALQ/USP, Caixa Postal 83, 13400 Piracicaba, SP, Brasil
IIIDepartamento de Biologia Geral, Universidade Federal de Viçosa, 36570 Viçosa, MG, Brasil

 

 

ABSTRACT

Main effect and genotype x environment interaction components of variance, the expected gains for indirect and direct selection, correlation between environments, intraclass correlation, and the concordance coefficient for yield were estimated to adjust the breeding program of irrigated and rainfed lowland rice conducted by EMBRAPA/CNPAF, and to evaluate the possibility of selecting lines from one system adapted to both growing systems.
The genetic gains (assuming a selection intensity of 40%) in rainfed lowland lines, with selection and response in irrigated environment (GSLCV2/2 = 6.80% and 8.00%) were superior to the genetic gains in irrigated lines, with selection and response in rainfed lowland environment (GSLI1/1 = 5.37% and 6.90%) for the crosses CICA 8/Metica 1 and 17388//7153/5738, respectively.
The superiority of the genetic gains in rainfed lowland lines, the high values of the correlations between environment and the concordance coefficients suggest that it is viable to develop a program of irrigated rice breeding with initial selections (until F5) being made in the rainfed lowland environment and evaluations and final selection in both environments.

Keywords: Oryza sativa; Irrigation.

 

 

REFERENCES

Allard, R.W. and Bradshaw, A.D. (1964). Implications of genotype environmental interactions in applied plant breeding. Crop. Sci. 4: 503-508.

Bigoto, C.A. (1988). Estudo da população ESALQ-PB 1 de milho (Zea mays L.) em cinco ciclos de seleção recorrente. Masters Thesis, ESALQ/USP, Piracicaba.

Boyd, W.J.R., Goodchild, N.A., Waterhouse, W.K. and Singh, B.B. (1976). An analysis of climatic environments for plant-breeding purposes. Aust. J. Agric. Res. 27: 19-33.

Cochran, W.G. and Cox, G.M. (1980). Diseños experimentales. Mexico, Editorial Trillas, 661 pp.

Comstock, R.E. and Moll, R.H. (1963). Genotype-environment interactions. In: Statistical Genetics and Plant Breeding (Hanson, H.D. and Robinson, H.F, eds.). Washington, National Academy of Sciences, pp.164-196.

Das, G.R. and Borthakur, D.N. (1974). Variability parameters for quantitative characters in photoperiod-intensitive tall and semi-dwarf rice varieties. Indian J. Agric. Sci. 44: 613-616.

Fehr, W.R. (1987). Principles of cultivar development. New York, Mac-Milian Publishing, 536 p.

Ferreira, R.P., Cutrim, V.A. e Rangel, P.H.N. (1988). Programa de Melhoramento de arroz irrigado no CNPAF. In: Proceedings of the Reunião da Cultura do Arroz Irrigado, 17, Pelotas, RS, Brazil, 1988. pp. 3-9.

Francis, C.A., Prager, M., Laing, D.R. and Flor, C.A. (1978a). Genotype x environment interactions in bush bean cultivars in monoculture and associated with maize. Crop. Sci. 18: 237-241.

Francis, C.A., Prager, M. and Laing, D.R. (1978b). Genotype x environment interactions in climbing bean cultivars in monoculture and associated with maize. Crop. Sci. 18: 242-246.

Goud, J.V., Nayar, K.M.D. and Rao, M.G. (1969). Recent trends in rice breeding in Mysore State; III. Adaptation and genotypic and phenotypic variability in three environments. Plant Breeding 62: 129-137.

Hamblin, J. and Zimmermann, M.J.O. (1986). Breeding common bean for yield in mixtures. In: Plant Breeding Reviews (Janick, J., ed.). Connecticut, Avi Publishing, v. 4, pp. 245-272.

Hill, J. (1975). Genotype-environment interactions - a challenge for plant breeding. J. Agric. Sci. 85: 477-493.

Lima, M., Patemiani, E. e Miranda Filho, J.B. (1974). Avaliação de progênies de meios irmãos no segundo ciclo de seleção em dois compostos de milho. Relat. Cientif. Inst. Genet. Esc. Sup. Agric. "Luiz de Queiroz , Universidade de São Paulo, 13: 84-89.

Mishra, K.N., Nanda, J.S. and Chaudhary, R.C. (1973). Correlation, path-coefficient and selection indices in dwarf rice. Indian J. Agric. Sci. 43: 306-311.

Perkins, J.M. and Jinks, J.L. (1971). Specificity of the interaction of genotypes with contrasting environments. Heredity 26: 463-473.

Rangel, P.H.N. (1984). Melhoramento do arroz para condições de várzeas úmidas. In: EMBRAPA-CNPAF. Melhoramento genético do arroz. Goiânia, EMBRAPA-CNPAF. pp. 89-112.

Rangel, P.H.N., Pinheiro, B.S., Prabhu, A.S. e Ferreira, R.P. (1987). Melhoramento do arroz (Oryza saliva L.) para as várzeas úmidas. In: Proceedings of the Reunião Nacional de Pesquisa de Arroz, 3, Goiânia, GO, Brazil, pp. 71.

Rasmusson, D.C. and Glass, R.L. (1967). Estimates of genetic and environmental variability in barley. Crop. Sci. 7: 185-188.

Santos, M.X. (1977). Interação genótipos x localidades em híbridos cripticos de milho S1 x S2, nas regiões Sudeste e Nordeste brasileiras. Masters Thesis, ESALQ/USP, Piracicaba.

Santos, M.S. e Naspolini Filho, V. (1986). Estimativas de parâmetros genéticos em trés ciclos de seleção entre e dentro de famílias de meios irmãos no milho (Zea mays L.) dentado composto Nordeste. Rev. Bras. Genet. 9: 307-319.

Sen, P.K., Bose, S. and Chakraborty, S.N. (1969). Genotypic variability in some important quantitative characters in rice, Oryza sativa L. Indian J. Agric. Sci. 39: 731-736.

Steel, R.G.D. and Torrie, J.E. (1980). Principles and procedures of statistics; a biometrical approach. 2 ed. New York, McGraw Hill Brok. 633 pp.

Vencovsky, R. (1987). Herança Quantitativa. In: Melhoramento e Produção de Milho no Brasil. (Patenani, E. e Viegas, G.P., ed.), Fundação Cargill, 2 ed., v. 1, pp. 135-214.

 

 

* Part of a thesis presented by P.H.N.R. to Escola Superior de Agricultura "Luiz de Queiroz" in partial fulfillment of the requirements for the Doctoral degree.