柑桔类果树是芽变频率较高的植物。我区历史上柑桔生产的特点之一,是长期采用压条繁殖苗木。由于自然选择和人工选择的结果,保存了丰富的甜橙变异类型。这是一份珍贵的资源财富,为我们开展甜橙芽变选种科研工作提供了十分有利的条件。 Citrus fruit trees are plants with higher frequency of transformation. One of the characteristics of the citrus production in the history of our district is the long-term use of battens to propagate seedlings. As a result of natural selection and manual selection, a rich variety of sweet oranges is conserved. This is a precious resource and wealth, which provides very favorable conditions for our research on the selection of sweet orange buds.