Abstract:‘Jinghu No.12’is a new summer squash F1 hybrid developed by crossing two inbred lines 02-1-5-3-10-6-5 and 03-3-10-9-8-2-16.It is an middle-early maturing variety.The plant grows vigorously with more female flower.The fruit is about 22-24 cm in length,6-7 cm in diameter with light green skin,glossy appearance,high quality.It yields about 180 t·hm-2 in winter greenhouse.It is tolerant to powderymildew,ZYMV,WMV.It has demonstrated very good adaptability in winter greenhouse,autumn plastic tunnel in North and open fields in South.It has been extended to Beijing,Shandong,Gansu,Guangdong,Guangxi and Sichuan etc.