北方诸省(区)已选育出一批抗寒新品种。这些品种比原有小苹果有很大改进,但品质欠佳。丹东地区低温,寡照,雨量偏多,多数地区不适于栽培现有的大苹果品种。为此,我们于1978年开展了选育抗寒、优质苹果新品种工作,历经15年,已育成了抗寒、丰产、优质、耐贮的优良苹果新品种丹光和丹苹。1 选育经过丹光原代号78-2-69(简称2-69),丹苹原代号78-2-64(简称2-64)。1978年 Northern provinces (districts) have bred a number of new cold-resistant varieties. These varieties have greatly improved than the original small apple, but poor quality. Dandong area of ​​low temperature, oligo-based, rainfall is too much, most areas are not suitable for cultivating existing large apple varieties. To this end, we carried out the work of breeding new varieties of cold-resistant and high-quality apples in 1978. After 15 years, we have developed Dan-Dan and Dan-Ping, which are excellent cold-resistant, high yielding, 1 Breeding after the original light of the original code 78-2-69 (2-69), Dan Ping original code 78-2-64 (referred to as 2-64). 1978