Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/38017
Título: Interação entre genótipos e ambientes em diferentes tipos de híbridos de milho
Título(s) alternativo(s): Genotype by environment interaction in different types of maize hybrids
Palavras-chave: Maize - Genetic improvement
Maize - Hybrids
Milho - Melhoramento genético
Milho - Híbridos
Data do documento: Dez-2010
Editor: Embrapa Secretaria de Pesquisa e Desenvolvimento Pesquisa Agropecuária Brasileira
Citação: COSTA, E. F. N.; SOUZA, J. C. de; LIMA, J. L; CARDOSO, G. A. Interação entre genótipos e ambientes em diferentes tipos de híbridos de milho. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n.12, p.1433-1440, dez. 2010.
Resumo: The objective of this work was to compare the productive performance, the adaptability and stability of single-crosses, three-way crosses and double-crosses maize hybrids originated from the same set of inbred lines. Ten single-crosses, 30 three-way crosses, and 15 double-crosses, besides nine commercial hybrids used as checks were evaluated. A 8x8 triple lattice experimental design was used in 12 environments. Ear yield corrected to 13% moisture content was the evaluated character. Individual and joint analysis of variance were performed and, in case of the presence of genotype x environment interaction the analysis of stability was proceeded by estimating the ecovalence and by applying the AMMI (Additive Main Effects and Multiplicative Interaction) method. The average productivity of single-crosses, three-way-crosses, and double-crosses from the same inbred lines did not statistically differ, and yield differences between the best-performance single-cross, three-way-cross and doble-cross hybrids was low (about 10%), which indicates the cost/benefit analysis as necessary to choose cultivars for commercial cropping. Double-crosses contributed the least to the genotype x environment interaction, followed by three-way crosses and single-crosses. The methodology allows of identifying high yielding and stable hybrids in all the evaluated maize types.
URI: http://repositorio.ufla.br/jspui/handle/1/38017
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