Research on Flower Bud Differentiation in Raspberry

Morphological characteristics and developmental process of flower bud differentiation in raspberry were observed every 7 days from 2008 to 2009.The results were as follows:flower bud differentiation started in early August and elimaxed in late August or september.The bud differentiation would proccess to the inflorescence primordium differentiation stage and stopped differentiate this year.From next mid-April,along with terminal inflorescen-ce primordial continued to develop,the bud was followed by Alabastram,Sepal,Petal,Stamen and pistil primordium differentiation stage while floral parts differentiated aeropetally appearing.Initial differentiation of raspberry was early August.Raspberry had combination bud and simple flower bud.