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Drought tolerance is an important agronomic trait but the genetic and physiological mechanisms that condition its expression are poorly understood. Molecular genetics and quantitative trait loci analysis provide a new and powerful approach to understand better the inheritance and expression of this trait. The purpose of this study was to use molecular markers to identify genetic loci associated with the expression of pre‐flowering drought tolerance in sorghum [Sorghum bicolor (L.) Moench]. Two genotypes with contrasting drought reactions, TX7078 (pre‐flowering tolerant, post‐flowering susceptible) and B35 (pre‐tiowering susceptible, post‐tlowering tolerant), were selected as parents for a sample of recombinant inbred (RI) lines. Ninety‐eight RI lines were evaluated in two different years under conditions of pre‐tlowering drought and full irrigation. This information was used to quantify the drought tolerance of each …