| Cucumber (Cucumis sativus L.) is an important vegetable crop. People have been using conventional breeding method to cultivate new breeds for a long time. Because of its narrow genetic background, cucumber has difficulties in distant crossbreed. Therefore, it is hard to widen its genetic resource. With the development of molecular biology, people began to cultivate new breeds through genetic transformation. The genetic technique and transformation system of cucumber is incomplete with low differentiation rate and positive rate. Thus, it is necessary to develop a stable... |