초록
뽕나무 오갈병의 발생률이 적은 장려뽕품종 “상일뽕”생장점에 Colchicine 적하처리를 하여 4배성인 4원뽕27호를 육성하였으며 그 주요 특성은 다음과 같다. 1. 염색체수는 2n=56인 4배체 이다. 2. 봄철 발아개엽기는 중생뽕이며 잎모양은 타원형과 3열엽이 혼재하는 폭광형이고 잎두께는 두껍다. 3. 가지길이와 마디사이 길이는 짧고 가지 기부의 불발아가 없으며 내동성은 모품종인 상일뽕보다 강하다.
The colchicine drop treatment is done on the growthpoint of the Sangilppong, which is the leading mulberry variety for mulberry dwarf resistance. So the breeding of the Sawonppong 27, that is tetraproidy, is succeeded and the chracteristics of this is as follows. The chromosome number of it is 2n=56, tetraproidy. The spring sprouting stage is midseason mulberry variety, and the leaf has a broad width shape that the oval leaf and the 3 lobed leaf exist simultaneously, The thickness of leaf is thick, the branch length and internorde length are short. The nonbudding of basal part does not exist and the cold hardness of this is stronger than the Sangilppong.