Head formation of broccoli (Brassica oleracea var. italica) is greatly reduced under high temperature (22 °C and 27 °C). Broccoli inbred lines that are capable of producing heads at high temperatures in summer are varieties that are unique to Taiwan. | Analysis of ambient temperatureresponsive transcriptome in shoot apical meristem of heat-tolerant and heatsensitive broccoli inbred lines during floral head formation