Abstract: The purpose this study was to verify the breeding potential of Flintisa
Composite for low (LT) and high (HT) technology of cultivation, and the best
selection strategy to be adopted. For this reason half-sib progenies were evaluated
in the two technological levels. In HT, it was used basic fertilization, two top
dressing and supplementary irrigation. In LT, these practices were suppressed,
and less fertile soil was used. Except for grain yield (GY), heritability was high
at plant level and at progenies mean level. With mass selection, estimated
gains ranged from 3.3% (GY in LT) to 41.8% (tassel branches number in LT). For
half-sib selection, estimated gains ranged from 4.7% (plant height in HT) to
23.6% (erect plants in HT). For ear height, stratified mass selection in just one
environment should be valid for both. Half-sib selection, with S1 recombination
should be adopted in specific selection programs for LT and HT

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