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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Crop Science
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Volume & Issues
Volume 20 - Dec 1975
Volume 19 - Sep 1975
Volume 18 - May 1975
Selecting the target year
Studies on Tissue Culute in Rice, Oryza sativa L.
Gun-Sik Chung ;
Korean Journal of Crop Science, volume 20, 1975, Pages 1~26
In order to provide basic information for the application of tissue culture to a rice breeding program. experiments were carried out on the callus formation from seedings and anthers and organ differentiation from the callus of rice varieties and their hybrids. It appeared that in general the callus tissue was more easily induced in japonicas than in indicas with significant varietal differences. A highly significant positive correlation (r=0.896
) was obtained between the fresh weight of callus induced in NAA medium and in 2, 4-D medium in the same variety. Callus formed on the medium with 2, 4-D was more friable than that formed on the medium with NAA. The callus formation from seedlings was better than from anthers in upland rice varieties. The easiness of the callus formation appeared to be a dominant character in crosses of rice varieties. Varietal difference was also noticed in the organ differentiation from the callus and the root differentiation seemed to be easier than the shoot differentiation. Most of the plants derived from the cal1us were albinos and the frequency of occurrence of albinos was greater in callus of seedlings than in that of anthers. Greater amount of callus tissue was formed from anthers of
plants than anyone of their parents in remote-crosses but it was clear in close-crosses. A highly significant positive correlation (r=0.504
) was found between the callus formation from seedlings and from anthers.
Studies on the Efficiency of Selection of Some Agronomic Characteristics in Accelerating Generations of Hybrid-Rice Population
Chea-Yun Cho ;
Korean Journal of Crop Science, volume 20, 1975, Pages 27~62
These studies were aimed at clarifying whether or not selecting agronomic characteristics of hybrid-rice populations under greenhouse conditions was useful. The selection of two quantitative characteristics, culm length and heading date, and two qualitative characteristics, shattering and awnedness, was very effective, but the flag leaf length and the exsertion of panicle was not consistent, varying from one cross to another.
Studies on the High Protein Mutants of Rice
Chang-Yawl Harn ; J. L. Won ;
Korean Journal of Crop Science, volume 20, 1975, Pages 63~68
Several high protein mutant lines(M4 plant generation, 1974) obtained from X-ray irradiated Jinheung variety were examined at three different locations for their agronomic characters, protein and grain yields. On the other hand, high protein-short culmed-early maturity mutant line No. 398 (M
plant generation, 1974) induced from Hokwang was crossed back to its mother to investigate the gene(s) controlling protein and its pleiotropic relation to other mutated characters. Although variation of protein percent of mutant lines from Jinheung was comparatively large depending on year and location, most of the high protein mutant lines had higher protein yield per unit area than the mother variety and their grain yields were equal to or better than the mother, being resistant to both leaf and neck blast. They were several days earlier-maturing and had shorter-culm except one mutant line. The culm length and heading date of F
between high protein mutant 398 and its mother Hokwang were intermediate. Accurate assessment of segregation of culm length and heading date in F
generation and protein percent in F
seeds will be conducted in 1975.
Post-Irradiation Oxygen Effect of Rice Seeds in Varying Seed Water Content
Young-Il Lee ; Kwang-Tae Choi ;
Korean Journal of Crop Science, volume 20, 1975, Pages 69~73
Jinheung rice seeds ranging from 5.6 to 14.7 percent of water content were X-irradiated from 1.5 to 25 kR in vacuum and then immediately hydrated in either oxygen- or nitrogen-bubbled water at around 19
for 12 hours. Results, as reported in terms of reduction of
seedling height and survival, sterility and
mutation frequency, indicate that the post-irradiation oxygen effect in very dry seeds was conspicuous; the seedling height and the survival were drastically reduced, and the sterility and the mutation frequency were increased in super dry seeds.
Studies on the Dry Matter Production and Growth Analysis of Rice Plants
Ho-Yul Kim ; Seung-Dal Song ;
Korean Journal of Crop Science, volume 20, 1975, Pages 74~86
Experiments were carried out to know some physiological characters of several rice varieties such as Suweon 213-1, Suweon 214, Palkweng, Akibare and Nongbaek. In experiments, total standing crop, leaf area and total net production of dry matter were higher in the variety of Suweon 213-1 than the other varieties. RGR, NAR and CGR showed the highest at heading period of Suweon 213-1 than the other varieties. Efficiency of solar energy utilization also showed the highest through the entire growing period of Suweon 213-1. The amount of net production and dead parts could be estimated by the successive application of the productive structure.
Effects of RH-531 Treatments on Growth, Yields and Quality in Barley and Wheat
Byeung-Hoa Kang ; Jae-Young Cho ;
Korean Journal of Crop Science, volume 20, 1975, Pages 87~94
By RH-531 treatments in Buheung, Suweon ＃ 165 and Suweon ＃ 18 of barley and Jangkwang, Namkwang and Suweon ＃ 85 of wheat, heading date and maturing date were delayed as the time of treatment delayed and as the concentration increased, field lodging in barley and lodging index in all cultivars were reduced, leaf growth after treatment showed erect elongation and darker green color, culm length and spike length and extrusion length were shortened, ripening ratio and yields were reduced, and protein contents in grain were increased. The effect of RH-531 treatment on each characteristics of each cultivars of barley and wheat was influenced more by treating time than concentration.
Varietal Difference in the photoperiodism of Sun-flower
Ik-Sang Yu ; Kwang-He Kang ; Jun-Ho Cho ;
Korean Journal of Crop Science, volume 20, 1975, Pages 95~99
Flowering of the sunflower varieties tested was accelerated by growing in the green-house as well as by short-day treatments at 8 or 12 hours. It may be concluded that the sun-flower plant is sensitive to short-day condition. Significant difference was observed between the , early and late maturing varieties in the flowering response to temperature treatment. Varietal difference, however, was not recognizable in the flowering response to the short-day treatment.
Studies on a Technique of the Generation Shortening for a Breeding Efficiency Promotion of Rape Oil Improvement -II. Influence of Different Maturing Stages to Seed Germination power and Dormancy in Brassica napus L.-
Jung-Il Lee ; Gyeong-Su Min ; Gi-Pyeong Choo ;
Korean Journal of Crop Science, volume 20, 1975, Pages 100~106
Germinating ability of green seed in maturing period was investigated to develop the technics on generation shortening. Rapeseed did not germinate until 40 days after flowering (=DAF) in green seed and 50 DAF in dried seed. Effective germination to be utilized for generation shortening came on 55 DAF for dried seed by heating and on 75 DAF for green seed. The periodic time of seed dormancy in maturing period had two cycles and rest period was considered that it was different according to the ecological types of early, middle and late maturity.
Studies on a Technique of the Generation shortening for a Breeding Efficiency promotion of Rape-oil Improvement -III. Effects of Ethrel (2-chloroethyl phosphonic acid) on Maturity shortening and Germination power in Brassica napus L.-
Jung-Il Lee ; Eung-Ryong Son ; Gi-Pyeong Choo ;
Korean Journal of Crop Science, volume 20, 1975, Pages 107~114
To develop the technics of generation shortening for the breeding of rape oil composition. effect of the ethrel and hydroperoxide treatment for the increasing of germination ability during maturing period was investigated. It was the most effect ire for a generation shortening that the seeds after, 10 days treated with
-0.5% and 2, 000ppm of ethrel and after 15 days treated with
-0.5% and 500ppm of ethrel on 15 day after flowering were germinated 76% and 90% respectively. It suggested that effect of ethrel and hydroperoxide was multiple and 4-5 generations could pass in a year because one generation needed only 66-71 days.
The Effects of Ethre1 Spraying on Shortening Maturity, Yield of Seed Cotton before Frost and Fiber Quality of Upland Cotton
Jung-Il Lee ; Eung-Ryong Son ; Dal-Ho Choi ;
Korean Journal of Crop Science, volume 20, 1975, Pages 115~121
To achieve self-sufficiency in good production, cotton should be grown after barley in the southern part of Korea. But, this cropping system reduces cotton yields and fiber qualities in the current leading cotton varieties because of the short frost-free growth period. Ethrel-treated plots shortened the time to open boll by about 20days, increased the percentage of open bolls before the first frost from 38% to 93% and increased yield by 15-38%. There are not significant differences in staple length, tensile strength of the fiber, single bollweight, 100 seeds weight and germination percentage of the seeds between Ethrel-treated and untreated plots. Ethrel should be recommended to the farmers growing cotton after barley harvest.
Studies on the Characteristics of Nitrogen Fertilizers and Influence of Sulfur Application on Rice Plant
Kyung-Je Kim ; Se-Kee Moon ; Byung-Sik Shin ; Se-Kee Moon ; Ki-Joo Kim ;
Korean Journal of Crop Science, volume 20, 1975, Pages 122~133
In recent years, farmers have substituted urea for ammonium sulfate as nitrogen fertilizer in their crop production. Since crops can not take urea itself directly as it is, we attempted to determine the amount of decomposition of urea in soil. It was observed that 25 percent of urea which had initially mixed with soil was decomposed in 10 days at 15
and 80 percent in 2 days at
. Therefore, it was considered that large amount of urea could be lost in cool season and cool areas. In the other experiment, ammonium sulfate, as a source of sulfur, was so mixed with urea that the ratio of sulfur to nitrogen would be 15 percent. Small amount of dolomite was also added to this
Studies on the minimum Number of short day Cycles needed for heading in Rice
Mun-Hue Heu ; Kwang-Ho Kim ;
Korean Journal of Crop Science, volume 20, 1975, Pages 134~141
The response to short day treatment in rice plant has been more sensitive along the progress of the growth until 35 days after seeding. The minimum number of short day cycles needed for heading of photoperiod-sensitive rice variety, BPI 76, were 29, 12 and 11 when treatment was started from seeding, 30 days and 35 or more days after seeding respectively.
Basic Studies for the Breeding of High Protein Rice -VI. Varietal variation of protein and amylose content of rice in response to cultural season and year-
Mun-Hue Heu ; Hak-Soo SUH ;
Korean Journal of Crop Science, volume 20, 1975, Pages 142~147
The varietal variations of protein and amylose content of rice grown at field and green house were studied. The protein content was negatively correlated with growth duration, and the amylose content was positively correlated with heading date. The environmental variation of the amylose content by cultural season and year was greater in the low amylose varieties than in the high amylose one.
Response of Rice Varieties to Various Herbicides -(I) Effect of Varying Water Depth and Temperature on Herbicidal Action-
K. U. Kiml ; Su-Bong Ahn ;
Korean Journal of Crop Science, volume 20, 1975, Pages 148~151
Response of rice varieties Tongil, Jinheung and IR 24 to four preemergence herbicides was determined. Saturn-s [s-(4-chlorobenzyl)-N, N-diethylthiol carbamate plus 2-methylthiol-4, 6-bisethylamino-2-triazine] caused severe injury to Tongil at the high temperature and less at the higher water level, but slight injury to Jinheung and IR 24. The difference may be explained by the shallower root system of Tongil, allowing more contact with the herbicide, or different varietal metabolic rates.
Studies on the Response of Barley Varieties to Nitrogen Application and Seeding Methods
Hong-Suk Lee ; Eun-Woong Lee ; Ho-Young Lee ;
Korean Journal of Crop Science, volume 20, 1975, Pages 152~162
Five barley varieties were compared under six 1evels of nitrogen fertilization and two methods of cultural management, conventional and drill seeding. The increase in grain yield and nitrogen content of the leaves showed a significant linear regression from added increaments of nitrogen in Haganemugi and Olbori, particulary under drill seeding. The other varieties resulted in various degrees of lodging and no significant increases in yield. The spike number per square meter was the major component of yield, but when the spike number per square meter was sufficient, 1000 grain weight was equally as important as a component of yield.