• Journal of Life Science
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• v.12 no.2
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• pp.213-218
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• 2002

The experiment was conducted to get basic information for cotton breeding program through four-variety diallel cross population. Additive, dominant, maternal, and reciprocal effect were observed significantly for days to maturity. Based on the Vr-Wr graphical analysis, the characters, number of bolls per plant, boll weight, seed and lint weight per boll, lint weight per boll, width of seed, 100-seed weight, days to flowering, and days to maturity were found to inherit incomplete dominance, and the characters of number of bolls per plant, width of seed, number of seeds per boll, and length of seed were assumed to inherit over dominance. The component of genetic variance analysis for boll weight, seed and lint weight per boll, lint weight per boll, number of seeds per boll, length of seed, and days to flowering showed that additive effects were higher than dominant effects. The narrow-sense heritability(h$_2$N) for boll weight, seed and lint weight per boll, lint weight per boll, days to flowering, and days to maturity showed high values as more than 43.19%. The estimate of broad-sense heritability(h$_2$B) value was higher than that of h$_2$N because of the low importance of dominance effects.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.26 no.2
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• pp.167-173
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• 1981

Respiration of whole seeds and seed parts isolated from four soybean varieties Essex, Pickett, Wayne and Bonus as measured at $25^{\circ}C$ during germination. The average respiration rates of cotyledons were significantly higher than those of other parts. The values were 35.7, 28.0 and $23.9{\mu}hr^{-1}$ seed$^{-1}$ for cotyledons, embyros, and hila, respectively. Bonus showed a significantly lower respiration rate than the other varieties did. The interaction of variety x seed part was not significant source of variation for respiration. This suggests that seed part and variety independently contribute to soybean seed respiration during early imbibition. The effects of imbibition time and time x variety intereaction on whole seed respiration were significant, but the variety effect was not significant. The correlation coefficient between seed moisture content and respiration after 24 hours of imbibition was significant for Bonus, but not for the other varieties tested. This suggests that Bonus may require more water for respiration during imbibition than the other varieties. There as no significant correlation of whole seed respiration rate after 24 hours imbibition with seed weight or seedling length.

• Korean Journal Plant Pathology
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• v.2 no.2
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• pp.96-101
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• 1986

Total 29 commercial crucifer seed lots were tested for seed transmission of Xanthomonas campestris pv. campestris by seed washing liquid plating assay. One imported cabbage seed lot was found to carry Xanthomonas campestris pv. campestris. Several methods and chemicals for eradication of Xanthomonas campestris pv. campestris in and on the cabbage seed were tested for effectiveness. Soaking cabbage seed in $3\3%$ hydrogen peroxide solution for 30 minutes effectively eradicated Xanthomonas campestris pv. campestris in a naturally infested seed lot. In a field survey, black rot turned out to be an important disease in cabbage in Korea.

• Journal of Practical Agriculture & Fisheries Research
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• v.3 no.1
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• pp.94-101
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• 2001

The correlation among days to germination, days to flower, days to seed ripening and number of seeds per a pod and their combining were studied in 15 F₁s from the partial six-parent diallel cross in Petunia hybrida. The days to flowering, days to germination and seed number per a pod showed high positive correlation together, however germination percentage and number of seed showed negative correlation with days to ability(SCA) were highly significant for all the characters. The estimates of variance components of SCA were greater than those of GCA for all the characters, showing preponderance of non-additive gene actions for these characters. The line of A and C showed relatively high GCA effect for days to germination and days to flower and the lines of C and G for germination, days to seed ripening and number of seeds per a pod. The crosses of D×G and E×F exhibited high SCA effect for decreasing days to flower and days to germination, and increasing germination percentage and number of seeds per a pod. The broad sense heritability was generally high compared to narrow sense one in the 5 characters. The higher heritability values of both broad and narrow sense were shown in the days to ripening and number of seeds per a pod.

• Korean Journal of Weed Science
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• v.18 no.1
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• pp.42-47
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• 1998

The experiment was conducted to study the growth, developmental pattern, and seed production of Commelina benghalensis L. grown from four seed types; large and small aerial seeds, and large and small underground seeds. Plants from the four seed types differed in growth rate. Based on dry weight and leaf area, plants from large underground seeds emerged and grew faster in the first 2-4 weeks after seeding(WAS) but plants from small aerial seeds grew faster during the 4-6 WAS; thereafter, there was no significant difference in growth rate among plants from the four seed types. Based on seed production, plants from large aerial seed produced more seeds(1473) than those from small seeds(1006). Small aerial types represented 75-77% of the total seed production, large aerial seed 21-23%; only 2-4% were underground seeds. The results suggest that the plants from large underground seeds might have better competitive ability Than those of small aerial seeds during the early growth stage due to faster germination and higher dry matter production.

• Korean Journal of Plant Resources
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• v.20 no.2
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• pp.150-154
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• 2007

This study was carried out to increase germination by classifying seeds as seed coat colors of three species of genus Pinus. As result, the seeds classified as colors showed a difference. In seed length, Pinus densiflora (Pd) and P. thunbergii (Pt) had no difference while P. rigitaeda (Pr) had a difference between light yellow seeds and dark brown seeds (p<0.05). Only Pt was different in seed width. And in 1,000 seeds weight the three species showed a great difference while were not significantly different in seed moisture contents. In percent germination, all of the three species had a difference, especially that of Pr was very wide. Pd and Pt were not different in mean germination time but Pr showed a difference between light yellow seeds and dark brown seeds.

• Korean Journal of Plant Resources
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• v.19 no.5
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• pp.580-585
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• 2006

This experiment was conducted to study the effects of sulphuric acid, cutting, cold stratification and hot water on the germination of Sophora japonica seeds, which have difficulty to germinate because they have hard and thick seed coats. The seeds were immersed in 30, 60 and 90% sulphuric acid for 30 minutes as seed scarifications, and cut 1/8, 2/8 and 3/8 of the opposite parts of radicles. As cold stratification the seeds were wrapped in wet towel, and then stored in plastic bags in a refrigerator $(4^{\circ}C)$ for 3, 5 and 10 days. The seeds were immersed in hot water $(90{\sim}95^{\circ}C)$ for 2,5 and 10 minutes. Pretreated seeds represented different germination properties, respectively. After sulphuric acid treatment, the seeds showed an increase in germination (G) and germination index (GI). Compared to the other treatments, 90% sulphuric acid showed the highest G (31.7%) and GI (6.2). The G and GI of cut seeds decreased with the increase of seed cutting lengths. And G and GI of cold stratificated seeds were not significantly different among the days treated (p=0.258). Two minutes treatment of hot water showed lower G and Gl than control, and the seeds were not germinated in 5 and 10 minutes treatments of hot water. At the result of relative growth rate and T/R ratio of seedlings from pretreated seeds, the seedlings from seeds in 90% sulphuric acid treatment represented the highest relative growth rate and T/R ratio.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.67 no.3
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• pp.137-146
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• 2022

Seed disinfection is a necessary process to decrease Bakanae disease in rice and is carried out at 30℃ to increase disinfection efficiency. However, the length of sprout after seed disinfection is not suitable for sowing, so additional processes such as seed soaking is needed. For this reason, this study was conducted to develop the efficient and effective seed disinfection method. When the seed disinfection finished after soaking seeds in cold water for 2 days, length of sprout was about 1.0 mm and sowing can be done without additional processes. In addition, the incidence of Bakanae disease was greatly reduced by 64% compared to conventional method. In order to find out why the newly developed method (disinfection after soaking) is more efficient than conventional method, soaked and not soaked seeds were stained using methylene blue staining. It was found that soaked seeds were more easily stained with about 50% of internal and external endosperm stained. Therefore, pesticide can be absorbed easily into internal endosperm of soaked seeds and efficiently destroy the spore of pathogen. As a results of this study, newly developed method will be useful as it can improve efficiency of agricultural work and also effectively decrease Bakanae disease compared to conventional method.

• Journal of Korea Society of Industrial Information Systems
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• v.25 no.6
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• pp.25-32
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• 2020

The seed, the most basic component, is an important factor in increasing production and efficiency in agriculture. Seeds with superior genes can be expected to improve agricultural productivity, crop survival, and reproduction. Currently, however, screening of superior seeds depends mostly on manual work, which requires a lot of time and manpower. In this paper, we propose a system that can extract the characteristics of seed phenotypes by using computer image processing technology, so that even a small number of people and a short period of time are needed to extract the characteristics of seeds. The proposed system detects individual seeds from images containing large quantities of seeds, and extracts and stores various characteristics such as representative colors, area, perimeter and roundness for each individual seed. Due to the regularity of input images, the accuracy of individual seed extraction in the proposed system is 99.12% for soybean seeds and 99.76% for rice seeds. The extracted data will be used as basic data for various data analyses that reflect the opinions of experts in the future, and will be used as basic data to determine the expressive nature of each seed.

• Journal of Korean Society of Forest Science
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• v.97 no.4
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• pp.357-362
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• 2008

We compared the morphological characters and stable isotopes of seeds of wild simulated ginseng with those of cultivated field ginseng. Seeds were collected from ten areas for wild simulated ginseng and two areas for cultivated field ginseng. The length, width, thickness and number of seeds per gram were measured and the ratio of stable isotopes of carbon and nitrogen was analysed as well. There was a overlapping variation of morphological characters and the ratio of stable isotope of the wild simulated ginseng among study areas. In Geumsan area, compared with the seed of cultivated field ginseng, the seed of wild simulated ginseng was significantly small and light, and the ${\delta}^{15}N$(‰) of wild simulated ginseng was lower than that of cultivated field ginseng. However, it is somewhat impossible to compare the regional variation of the unique value of ${\delta}^{15}N$(‰) among study areas of wild simulated ginseng. We can suggest the value of ${\delta}^{15}N$(‰) can be used as detection factor for cultivation regime like chemical fertilization and organic farming.