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방사선 처리에 의한 돌연변이육종 (突然變異育種) (2) X 선 및 열중성자가 배추와 무우 기건종자에 (氣乾種子) 미치는 영향
김동우(Dawng Woo Kim),김랑춘(Yang Choon Kim),조미경(Mi Kyung Cho) 한국식물학회 1962 Journal of Plant Biology Vol.5 No.1
Kim. Dawng Woo, Yang Choon Kim and Mi Kyung Cho(Horticultural Experiment Station, Seoul, Korea)-Breeding Experiment on Mutation Induction by Irradition. (2) Effects of X-ray and Thermal Neutron Irradiation on Dry seeds of Chinese cabbage and Radish. Kor. Jour. Bot. Vol. V. No. 1. p.1∼6. 1969 : With the aims to find the biological effects of X-ray and thermal neutron on dry seeds of Chinese cabbage and radish, and to examine the utility of artificial mutation in plant breeding, this experiment was carried out through the treated and next generation. The results obtained are summarized as follows: 1) Germination rate was rather irregular than decreasing as increasing dose of radiation and there were no differences between Kyong-Sam and Chyong-Bang of Chinese cabbage. 2) In R_l generation, abnormal leaves from seedling of irradiated seeds were observed. These were more apparent in X-ray irradiation than in thermal neutron. 3) Seedling height was inhibited with increasing dose of X-ray and thermal neutrons. Growth inhibition was more remarkable in X-ray than in thermal neutron. Kyong-Sam demonstrated more sensitivity than Chyong-Bang in both X-ray and thermal neutron. 4) Seedling height produced from seeds subjected to thermal neutrons showed small variation around its mean value, while in X-irradiation there was a greater deviation from the mean value. 5) Fertility was decreased as increasing with dose, while the frequency of abortive pollen was increased. There were variability of the fertility and frequency of abortive pollen among plants or branches of a plant. 6) The mutants were obtained more in thermal neutron irradiation than in X-ray. The types of mutations obtained in Chineae radish of R_2 generation were abnormal leaf, densely glowing leaf, degeneration in growing point and dwarf. The maximum frequency of phenotypic mutations was abnormal leaf mutation.
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김랑춘,李秉昶 慶北大學校 産業開發硏究所 1976 硏究報告 Vol.4 No.-
The performance stability of fourteen varieties (or strains) including Tongil grown at six locations of Kyungpook Province in 1975 was determined by the statistical methods of Finlay and Wilkinson, and Eberhart and Russell. The restults indicated that Milyang 23 was the most productive and adaptable variety at six locations in Kyungpook Province.
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김랑춘,李準琸 慶北大學校 産業開發硏究所 1975 硏究報告 Vol.3 No.-
This experiments were investigated to obtain the cultural information of pearl barley(Coix lachryma-jobi L. mayuen (ROMAN) STAPF) in the upland field by different seeding dates. The obtained results were summarized as follows: 1. According to late of the seeding date, heading date and maturing date were delayed. Plant height, number of tillers, 100 grain weight, weight of straw per plant, yield(weight of grain per plant) and maturirg ratio were decreased, but number of grain per tiller was increased. 2. It was injured by European corn borer (Pyrausta nubilalis HUBNER), the earier the seeding date, the greater the injury. But diseases were not found during the pearl barley was grown. 3. Yield was showed negative correlations with plant height and 100 grain weight in the plot seeded on June 15th, but was showed highly positive correlations in other characters regardless of seeding dates. Generally, number of tillers was showed negative correlations with number of grain per tiller and 100 grain weight, but was showed positive correlations with weight of straw per plant and yield. 4. In the plot seeded on May 15th, there were highly positive correlations between all characters, except number of tillers was showed negative correlation with number of grain per tiller. In the plot seeded on June 15th, 100 grain weight was showed negative correlations with all characters.
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김랑춘 慶北大學校 1976 論文集 Vol.22 No.-
This study was conducted to determine the direct or indirect effects of yield components to the early or total yields in red pepper by path-coeffient analysis. Twelve F_1 hybrids which were made from diallal crosses with four varieties (621, Takanozume, 2520, Hot Portugal) were used. The highest direct effect upon the early yield was fruit weight, followed by the number of fruit per plant and the days to flowering. The number of fruit per plant had the highest direct effect upon the total yield and next were fruit weight and stem diameter. It can be concluded that the fruit weight had directly or indirectly important effects on the early or total yields and that the number of fruit per plant should be considered in the selection for the higher production.
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김랑춘 慶北大學校 1977 論文集 Vol.23 No.-
Seven varieties in southern and twenty varieties in northern ecotypes of garlic were used for this study. Genetic variability for plant height, leaf length, flower stalk length, bulb diameter, bulb height, clove number per bulb and bulb weight were estimated. The results obtained were summarized as follows: The genetic coefficient of variation ranged from 1.1% for leaf length to 23.7% for flower stalk length in southern ecotype and from 5.0% for plant height to 39.2% for flower stalk length in northern ecotype. All the investigated characters excepting clove number showed a comparatively high genetic coefficient of variability in northern ecotype than in souhern. Both phenotypic and genetypic variances were more or less similiar in all cases and were very high for flower stalk length. Characters having high heritability in broad sense were flower stalk length (92.0%) and bulb weight (80.7%) in southern and bulb weight (94.0%), flower stalk length (87.6%), plant height (77.7%), leaf length (79.7%) bulb diameter(74.3%) in northern. Flower stalk length and bulb weight showed high genetic advance as the percentage of mean. From the above results it was postulated that selection for bulb weight composing yield would be effective.
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