Shanghai Biozeron Biotechnology Co., Ltd 1 article published in JoVE Environment Generating Homo- and Heterografts Between Watermelon and Bottle Gourd for the Study of Cold-responsive MicroRNAs Lingping Wang*1, Xinyi Wu*1, Guojing Li1,2, Xiaohua Wu1, Dehui Qin3, Ye Tao4, Pei Xu1,2 1Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, 2State Key Lab Breeding Base for Sustainable Control of Plant Pest and Disease, Zhejiang Academy of Agricultural Sciences, 3Institute of Horticulture, Zhejiang Academy of Agricultural Sciences, 4Shanghai Biozeron Biotechnology Co., Ltd Here we present a detailed protocol for efficiently making homo- and heterografts between watermelon and bottle gourd, in addition to methods of tissue sampling, data generation, and data analysis, for the investigation of cold-responsive microRNAs.