White oat progenies based on the agronomic ideotype due to response to environmental stimulus

ABSTRACT: The development of a selection strategy and to obtain a precocious white oat progenies, homogeneous for flowering and with additions to panicle grain mass, reconciled to environmental stimuli controlled by air temperature. The experiment was conducted in the municipality of Augusto Pestana, in the state of Rio Grande do Sul, Brazil. The experimental design was in augmented blocks with intermediate control, the regular treatments corresponded to 238 white oat progenies and the common treatment was represented by the commercial control (URS Taura) arranged in three replications. The selection for grains weight per panicle, percentage of flowered plants, days to physiological maturity and accumulation of degrees day are due to a high genetic contribution, which indicated promising selection for these characters already in initial breeding generations. The accumulation of degrees days for physiological maturity defines that 41.94% of the progenies are selected as precocious. The genotype ideotype distance index (MGIDI) selected 20% of the white oat progenies with greater flowering uniformity, less accumulation of degrees days and high potential for grain mass per panicle.