金冠在大部分地区,特别是沿海和多湿的苹果栽培区,普遍产生果锈,严重时果面粗糙锈斑连片,影响果实外观,商品价值低,成为发展金冠苹果的主要障碍。1979年我们通过辐射诱变途径,以60Coy射线4.5千仑处理一批金矮生品种的休眠枝,处理后高接,从结果的高接枝条中,选出了无锈金冠新品 Golden crown in most areas, especially in the coastal and wet apple cultivation area, the widespread production of fruit rust, severe rust surface rusty contiguous, affecting the appearance of fruit, the low value of the goods, as the main obstacle to the development of Golden Delicious apple. In 1979, we treated a dormant branch of a group of gold dwarf varieties with 60 Coy rays at a wavelength of 4.5 km using radiation-induced mutagenesis. After treatment, the dormant branches were picked up. From the high grafting results, a new rust-free crown was selected