Research progress on genetic diversity in Cucurbitaceae crops
Cucurbitaceae is the fourth most important economic crop in the world,comprising 960 species in 115 genera and possessing rich germplasm resources.However,the cultivated species of Cucurbitaceae crops have gradually become assimilated and the genetic diversity of germplasm resources has become narrower due to long time selection for yield and high quality.A systematic study on the genetic diversity of Cucurbitaceae crops will enable us to explore their germ-plasm in a more comprehensive way,which would help in promoting the breeding program.In this paper,the origin of Cu-curbitaceae crops and their phylogenetic relationships were introduced,and the collection of germplasm resources of Cu-curbitaceae crops was explored.The authors also summarized the relevant studies of genetic diversity of Cucurbitaceae crops and breeding innovations,especially those of cucumber,pumpkin,watermelon,melon and wax gourd,which lays a solid foundation for the utilization of variety and cultivation of Cucurbitaceae crops.