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RISS 인기검색어
- 검색키워드
- 저자 : J.L. WON(元鍾樂) (검색결과 4 건)
- 무료
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고추染色體의 複合轉座合成에 關한 硏究 1. 轉座 homo個體의 選拔
C. Harn(韓昶烈),J. L. Won(元鍾樂) 한국육종학회 1975 한국육종학회지 Vol.7 No.2
Thirty seven plants with ④ type simple reciprocal translocation of chromomoses was obtained by treating seed of hot pepper with X-ray. Selection of translocation homozygotes, numbering of chromosomes which have participated in the translocations, synthesis of multiple-translocations from simple ones were attempted for use in various genetical and breeding purposes. Present report, the first of series of articles which will be presented subsequently, describes mainly the procedural works on the induction of translocation and selection of translocation homozygotes.
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放射線處理한 벼 M₁이삭의 變異 sector에 關한 硏究
C. Harn(韓昶烈),J. L. Won(元鍾樂) 한국육종학회 1975 한국육종학회지 Vol.7 No.2
When mature seeds of cereal crops are treated with mutagenes, there occurs frequently the deficit of homo-recessive mutant in the M₁ generation, thus the segregation of recessiveness deviating from the expected ratio of 0.25. This has been considered caused partly by the function of the mutated gene and partly by the chimaeric nature of the M₁ panicle. Studies on the M₂ segregation inevitably led to the assumption of the size of mutated sector in the M₁ panicle and to the speculation on the number of initial cells (in the seed embryo) which would later form the sporogenous tissue of the M₁ panicle. So far the views concerning the initial cell have been conflicting and controvertial. X-rayed rice seeds were sown directly in the pots and all the tillers including the lower ones were induced to full growth to examine whether there exists any difference in the segregation ratio among the tillers. No definite tendencies or regularities in the segregation ratio among the tillers were observed. If the number of initial cells varies with the order of tiller emergence, i.e., main culm having several and the upper tillers having only one cell, there would be certain definite tendency in the segregation ratio among the tillers, with the upper tillers approaching the expected ratio, which was not proved in the present experiment. As it is assumed that the mutated cell, mutated gamete, and homo-recessive mutant might be affected by many factors, it does’nt seem to be correct to speculate the sector size in the M₁ panicle and the number of initial cells in the seed embryo simply by the M₂ sgregation ratio.
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手稻高蛋白 突然變異系統과 母品種과의 交雜에 있어서 多發性遺傳因子의 發現에 關한 硏究
C. HARN(韓昶烈),J. L. WON(元鍾樂) 한국육종학회 1976 한국육종학회지 Vol.8 No.2
High protein rice mutant (M₁₂ plant generation in 1976) was obtained from the progeny of X-rayed Hokwang variety. Besides high protein, the mutant accompanied two other mutated characters of reduced culm length and earlier heading date. Crossing between the mutant and its mother variety was made (1) to examine the gene(s) controlling high protein, (2) to verify the pleiotropic (or linkage) relation among the three changed characters and (3) to test the possibility of intro-ducing the high protein gene(s) into mother variety. The assumption that a single pleiotropic recessive gene might be responsible for the three mutated characters was evidenced in F₂ by the segregation of mother and mutant types in the ratio of 3 : 1. Besides these parental types there were numbers of segregant groups in F₂. Among them were types which were mother-like phenoty-pically but had as high protein content as the mutant. These segregants were placed under further experiment for the confirmation of the character manifestation or fixation in later generations.
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S.H. KWON(權臣漢),J.L. WON(元鍾樂) 한국육종학회 1980 한국육종학회지 Vol.12 No.2
Grafting technique in soybean was applied in the study. Grafting was made under different growth stages using cleftgrafting method and the grafted part was binded with a thin vinyl sheet. Reciprocal graft of various varieties was fully successful at cotyledon stages. Gradual decrease of grafting percent was observed as the use of aged rootstocks and scions. Various characters, such as flower color, stem color, leaf size, seed coat color and maturity were inherited from scions. The cuttings practiced before flowering were completely successful through gravel culture method.
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