The cultivater Riben Nangua showed the characteristic protein bands of C. moschato Duch and C. maxima Duch at the same time.It is conferred that it was the crossbreed of this two cultivated species.

• 栽培品种日本南瓜同时显示出中国南瓜和印度南瓜的特徵条带，推测可能是2个种的种间杂交种。