High temperatures interfere with sexual reproduction and thus fruit and seed set. Heat tolerance was analyzed, among other things, by pollen viability and pollen number. Quantitative trait loci (QTLs) were identified for most of these traits, including a single, highly significant one for pollen viability, which accounted for 36% of phenotypic variation in the population and modified pollen viability under high temperature with around 20%. Download the publication by Xu et al. from the group of Prof. Ivo Rieu.