Fruit shape is an important appearance trait of fruit trees,which affects the commercial value of fruits.The shape of most fruit crops is a quantitative trait controlled by multiple minor-effect genes.It is greatly influenced by environmental factors,making its genetic mechanism is complex.In recent years,some progress has been made in the research on the genetic development and molecular mechanism of fruit shape in fruit trees.This study systematically organizes and summarizes research on the genetic development of fruit shape in fruit trees from three perspectives:cytological studies of fruit development,inheritance of fruit shape,and studies on genes related to fruit shape.The research progress on the localization of QTLs and major genes related to fruit shape was highlighted.Moreover,the problems existing in the current researches were analyzed and the future research direction on fruit shape was also prospected,in order to provide references for the subsequent breeding improve-ment of quality traits in fruit trees.
Fruit treesFruit shapeGenetic developmentGene location