Seed set variability under high temperatures during flowering period in pearl millet (Pennisetum glaucum L. (R.) Br.)

•Threshold values for seed set response to max. and min. temp are 42°C and 26°C.•Variability exists for seed set under high temperatures during flowering period.•Hybrid parents and breeding materials with high temperature tolerance identified.•Female reproductive system is more heat sensitive than pollen in pearl millet.•Heat tolerance is a dominant trait in pearl millet.