본 시험은 사과 교배실생에 식물생장조절물질 및 접목 처리가 유년성 단축에 미치는 효과를 구명하여 육종효율을 증진 시키고자 수행하였다. 사과 교배실생을 1년간 생장 후, M.26 대목에 접목 처리, ‘후지’ 성목에 고접 처리, 혹은 실생대목에 접목하여 식물생장조절물질 처리를 하였을 때 유년성 단축효과를 구명하기 위하여 실시하였다. 사과 교배실생 유년성 단축에 가장 효과적인 처리는 ‘후지’ 성목 고접처리구로서 접목 3년차에 38% 개화되었고, 접목 4년차에 100% 개화 되었다. 사과 교배실생을 실생대목과 M.26대목에 접목처리는 접목 3년차에는 개화가 되지 않았으며, 접목 4년차에 각각 30.5%, 33.0% 개화되었다. 실생대목에 접목하여 1년 키운 교배실생에 식물생장조절물질을 처리한 결과, ABA(1,000㎎ㆍℓ?¹)와 B-9(1,000㎎ㆍℓ?¹) 처리구에서 접목 4년차에 각각 91.8%, 87.5%의 개화율을 보여 유년성타파에 비교적 효과적이었다.
For accelerating the apple breeding program, shortening the juvenile phase of seedlings is very important. This study was carried out to develop early fruiting methods using plant growth regulators and graftings in apple seedlings. The effects of plant growth regulators and grafting on shortening of the juvenile phase in apple cross seedlings were evaluated. First blooming and blooming rates of apple seedlings were various on treatments. The treatment of apple seedling grafted onto established ‘Fuji’ trees was more accelerating flowering than the other treatments. 38% of scions grafted on established ‘Fuji’ apple tree was flowered in third year after grafting, and 100% of these treatment was flowered in the fourth year. The treatment of apple seedling grafted onto seedling or M.26 rootstock was not flowered in third year after grafting, 30.5% or 33.0% of these treatments was flowered in the fourth year, respectively. Among foliar spray in one year old scions grafted on seedling rootstocks with growth regulators, abscisic acid (1,000 ㎎ㆍℓ?¹) and daminozide (1,000 ㎎ㆍℓ?¹) treatments induced flowering 91.8%, 87.5% in the fourth year, respectively.