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팔당산 호밀 ( Secale cereale ) B 염색체의 출현빈도에 대하여
이웅직 (Woong Jik Lee) 한국식물학회 1981 Journal of Plant Biology Vol.24 No.4
Rye in Paldang was investigated with regard to the occurrence of B-chromosomes from 1963 through 1977, and frequencies of B-chromosomes were as follows; 2% (1963), 8% (1964), 8% (1965), 15%(1966), 11.5% (1968), 11.7% (1969), 20% (1975), 19.6% (1976), and 12.8% (1977). The reuslt of the chi-square test showed statistically no significant difference between the frequency of B-chromosomes each year. The analysis revealed that distribution of B-chromosomes seemed to be relatively uniform in the rye field. With regard to the sample size 50 plants were quite enough to estimate the frequency of B-chromosomes in rye population. Quadrivalent due to translocation heterozygote were observed in the population of Paldang rye from 1966 through 1977, their frequencies being 1 to 70%. Numerical increase of B-chromosomes in rye due to non-disjunction process in the pollen as well as in the ovules was well-known phenomenon, whereas B-chromosomes tended to be eliminated in meiosis and seed fertility of rye was reduced in the individuals with B-chromosomes. The mechanism of gain of loss for B-chromosomes might support the equilibrium of B-chromosomes in Paldang rye population.
이웅직(Woong Jik Lee),방재욱(Jae Wook Bang),최상율(Sang Ryul Choi) 한국식물학회 1979 Journal of Plant Biology Vol.22 No.4
Giemsa C-banding analysis with Korean rye strain revealed that individual chromosomes had characteristic banding patterns making it possible to distinguish the seven rye chromosomes one from another. It seems to be evident that B-chromosomes in rye contain proportionally more heterochromatin than autosomes.
호밀 상호전좌의 (相互轉座) Transmission 에 대하여
이웅직 (Woong Jik Lee) 한국식물학회 1975 Journal of Plant Biology Vol.18 No.4
The rye strain 72-1 derived from the cross between ♀(OB, normal)×♂(2B, Ⅵ+and Ⅵ-) were investigated. It was found that (Ⅵ+, Ⅵ-), Ⅵ+, Ⅵ- were segregated and the frequency of quadrivalent per PMC were varied in different plants. The frequency of transmission of B chromosome to the strain 72-1 showed 61.9%. The plant 72-1-15 was found to be trisomic together with 2 B chromosomes.
「 감마 」 - 선조사에 (線照射) 의하여 호밀의 감수분열에 유발된 생리적 영향
이웅직 (Woong Jik Lee) 한국식물학회 1958 Journal of Plant Biology Vol.1 No.2
1. A vernalied Korean rye was exposed to Co^60 in dose of 150r (dose rate was 7r per minute) and pollen mother cells were examined for cytological study. 2. According to the observation, it is quitc clear that scraping of chromosomes soon after irradiation and surface stickiness at the period of 6 hours after irradiation were fellowed by strurtural changes at the period of 12 hours after irradiation.
호밀의 부속염색체에 관한 연구 (4) - 한국산 호밀의 부속염색체의 출현빈도 ( 속보 (續報) )
이웅직(Woong Jik Lee),민병례(Byeung Re Min) 한국식물학회 1968 Journal of Plant Biology Vol.11 No.2
Further study on the frequency and geographical distribution of rye with accessory chromosomes in Korea was carried out in 1966. All of the 15 populations of rye investigated were found to have accessory chromosomes and the frequencies of accessories were ranged from 15 to 54%. The study from 1963 to 1966 shows that the frequency of accessory ranging from 30 to 40% is predominant.
WOONG JIK LEE(李雄稙),JAE WOOK BANG(方在旭),YONG SUNG KIM(金容聖) 한국육종학회 1980 한국육종학회지 Vol.12 No.3
Giemsa C-banded Karyotype of rye, local variety “PALDANG” was investigated. In the present work, new bands were observed on the chromosome I,V,VII and B in comparision with author’s previous work on C-banding pattern using the other strain of Korean rye. These variations represent polymorphism between various rye cultivars but sometimes it may be caused by different staining methods.
한국산 호밀의 부속염색체의 (附屬染色體) 출현빈도와 지리적분포
이웅직(Woong Jik Lee),민병례(Byung Re Min) 한국식물학회 1965 Journal of Plant Biology Vol.8 No.4
Cytological observations were carried out to investigate the frequencies and geographical distribution of accessory chromosomes in rye in Korea. (1) All the 41 strains of rye investigated were found to have accessory chromosomes and the frequencies of accessories are ranged from 2 to 73.3%. (2) The frequency ranging from 30 to 40% was predominant and it included 13 different strains. (3) The edaphic factor seemed to play more marked role than the climatic factor in determining geographical distribution of accessories in rye in Korea. (4) Breakages of A-chromosomes into two fragments were observed in 11 plants. This phenomenon may throw some light on possible origin of accessory chromosomes in rye.