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Fatores relacionados à produção e desenvolvimento de afilhos em trigo

2009; UNIVERSIDADE ESTADUAL DE LONDRINA; Volume: 30; Issue: 4Sup1 Linguagem: Inglês

10.5433/1679-0359.2009v30n4sup1p1207

1679-0359

Igor Pirez Valério, Fernando Irajá Félix de Carvalho, Antônio Costa de Oliveira, Giovani Benin, Luciano Carlos da Maia, José Antonio González Silva, Douglas Malmann Schmidt, Gustavo da Silveira,

Soil Management and Crop Yield

Wheat plants use different strategies for achieving grain yield. Among them, one can point out the compensatory mechanisms among the grain yield components: number of ears per unity of area, number of grains per ear and grain weight. Grain yield in wheat is mostly represented by tiller production, providing that plants are adequately spaced from each other and that weather conditions are favorable to stimulate tillering. Thus, it is necessary to understand the different factors that are related to tiller production and development. The signalling pathways and the morphophysiological responses to environmental factors such as light quality, soil fertility and water availability are also important. The correct adjustment of these factors, as presented in this review, is essential for maximizing grain yield. In the breeding programs it is important make efforts to use genotypes with low number of tillers, even with a higher number of seeds per hectare, to maximize grain yield, reducing the dependence on environmental variables.