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무우의 抽臺, 開花 및 其他 몇가지 形質의 遺傳에 關한 硏究
W. M. YOON(尹禾模),H. K. PYO(表鉉九) 한국육종학회 1977 한국육종학회지 Vol.9 No.1
This study was carried out to learn some informations for selection by investigating the inheritance of some characters and their heritabilities in the crosses between Korean and Japanese type of radishes. Red color showed dominance to colorless in hypocotyl and inflorescence junction, and it seemed to be controlled by one gene difference. The color of root-top was supposed to be governed by two duplicate genes. Continuous distributions were shown such morphological characters as number of parted leaflets, root length, root diameter and root shape index in F₂ population. It was assumed that polygenes might be related with the number of parted leaflets, root lenth and root diameter and a few major and minor genes with root shape. Polygenic control might be observed in root weight which was influenced, to a large extent, by the environmental conditions. Earliness was proved to be almost complete dominance in days to bolting and flowering. Means of F₂ populations were inclined to earliness and the distribution showed like a discontinuous curve, thus a few major genes governing bolting and flowering, and the minor genes deranging the activities of major genes. The narrow sense of heritabilities for seven characters mentioned above ranged from 0.473 to 0.990. In particular, those for days to bolting and flowering were high. Root diameter and root weight demonstrated the high heterotic effects and the latter severe inbreeding depression.
여름무우 品種改良에 있어서 單株系統法의 利用 硏究(1) F₁品種의 兩親系統 育成法으로서의 可能性 檢討
S.S. Lee(李洙聖),W. M. Yoon(尹禾模) 한국육종학회 1984 한국육종학회지 Vol.16 No.2
The single seed descent method was tried for developing parental inbreds of an F₁ hybrid variety for summer production of radish. A double cross population was provided by crossing a virus resistant plant of the variety Minowase to the commercial true variety Yonghyeon which was mild-resistant, and then to the commercial F₁ variety Taebaeck which was very susceptible to virus disease. Fifteen percent out of 185 inbreds at the F₅ generation was resistant or tolerant to virus and soft rot diseases. At least three different self-incompatibility alleles were identified to be involved in the 5 lines selected finally and S-allele segregation was detected in three inbreds out of these selections. Heterosis of F₁ hybrids between selections seemed to be enough to meet the breeding goal. Consequently, it is considered that the single seed descent technique can be applied to developing inbred lines for an F₁ hybrid suitable for summer production of radish, which is an out-crossing crop, on low land.