我省于1974年参加全国苹果芽变选择与利用研究协作课题。几年来,在全省产区广泛发动群众,深入开展苹果选种工作。1976年在茂汶县石鼓公社石鼓大队海拔1550米处选出川苹76——23。该县位于我省阿坝藏族自治州东南部,气候冷凉干燥、昼夜温差大,日照充足,年平均气温11.2℃,3——5月为7.3——15.5℃, I province in 1974 to participate in the national apple bud mutation selection and utilization of research collaboration topics. In recent years, extensive mobilization of the masses in the producing areas across the province to carry out in-depth selection of apples. In 1976 Maowen Shek Kwu Kwu Shum brigade at 1550 meters above sea level election Chuan Ping 76--23. The county is located in the southeastern part of Aba Tibetan Autonomous Prefecture in our province. The climate is cool and dry. The temperature difference between day and night is large and the sunshine is abundant. The average annual temperature is 11.2 ℃, 7.3--15.5 ℃ in March-May,