HOU Quan-gang， SHAO Deng-kui， LI Jiang， LI Quan-hui， ZHANG Guang-nan
Key Laboratory of Vegetable Genetics and Physiology of Qinghai Province， Institute of Horticulture，Qinghai Academy of
Agriculture and Forestry Sciences，Xining 810016，Qinghai，China
‘Qinghu No.1’ is a new summer squash F1 hybrid developed by crossing inbred line‘ 0452-086’
as female parent and inbred line‘ 0921-033’ as male parent．The plant grows vigorously with short nods．The
first female flower sets on the 5-6 th nodes．The fruit is of straight， long stick shape with dark green peel．The
average verticle diameter is 28.75 cm and transverse diameter is 7.27 cm．The single fruit weight is about 670 g．
It has continuous fruit setting ability， and good commodity quality．Its average yield can be over 61.5 t·hm-2， the
highest one can reach over 79.5 t·hm-2．It takes about 50 days from sowing to harvesting in Xining region．The
whole growth duration is about 120 days．In fields， its resistance to powdery mildew is stronger than that of the
contrast‘Zaoqingyidai’．It is suitable for planting in greenhouse the whole year round in Qinghai Province and in
opening field at regions under 2 900 m altitude over summer.
