• The Korean Journal of Ecology
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• 제19권2호
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• pp.107-123
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• 1996

The position effects on the abortion of flowers, fruits, and ovules were examined in relation to the resource limitation hypothesis using a temperate legume species, Vicia cracca. Fifty plants were randomly sampled from a natural population located at the Belmont Conservation Site in Belmont, MA, USA. Due to indeterminant growth and acropetal flowering of this species, the position of flower or fruit on the plant was able to be coded by the combination of architectural levels such as plant half (lower and upper half) and inflorescence half (lower and upper half) within each plant half. Overall, only 17.3% of the flowers on an inflorescence began to develop into fruits, while overall 36.0% of the fruits initiated failed to mature. Consequently, 11.5% of the flowers successfully matured into fruits. The mean flower number per inflorescence differed significantly among plants as well as between plant halves. Although the probability of fruit initiation was higher in the lower halves of both plant and inflorescence than in the upper halves of the latter, fruit abortion rate differed significantly only between plant halves. The overall mean seed set was 33.6%, implying that about two out of six ovules in a fruit matured into seeds. The seed set was independent of both plant identity and architectural level unlike other reproductive characters examined. When the ovule developmental stage was examined on data pooled over all fruits, the proportion of ovules in varying developmental stages decreased in order of early abortion, seed maturation, late abortion, and seed predation (48.4, 34.9, 12.2, and 4.5%, respectively). A within-fruit ovule position was also used as a class variable for the analysis of position effects on ovule development. All architectural levels considered exerted singificant influence over the ovule development. In particular, ovule development was strongly affected by the within-fruit ovule position. Ovules in both extreme ends within a fruit tended to abort early, while those in the middle position were more likely to mature into seeds. The strong position effects detected from the flowering to seed maturation stage were interpreted as an indication of competitive interaction among reproductive characters which are largely constrained by plant architecture.

• 한국작물학회지
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• 제54권1호
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• pp.24-28
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• 2009

This study was conducted to evaluate the growth characters and yield components of 18 collected sesame cultivars to get basic information on the variation for the sesame breeding using principal component analysis. All characters except days to flowering, days to maturity and 1,000 seed weight showed significantly different. Seed weight per 10 are showed higher coefficient of variance. Capsule bearing stem length and liter weight showed positive correlation with seed yield per 10 are. The principal components analysis grouped the estimated sesame cultivars into four main components which accounted for 83.7% of the total variation at the eigenvalue and its contribution to total variation obtained from principal component analysis. The first principal component ($Z_1$) was applicable to increase plant height, capsule bearing stem length and 1,000-seed weight. The second principal component ($Z_2$) negatively correlated with days to flowering and maturity by which it was applicable to shorten flowering and maturity date of sesame. At the scatter diagram, Yangbaek, Ansan, M1, M2, M4, M7 and M9 were classified as same group, but M10, Yanghuk, Kanghuk, M5, M6, M12 and M13 were classified as different group. This results would be helpful for sesame breeder to understand genetic relationship of some agronomic characters and select promising cross lines for the development of new sesame variety.

• 한국약용작물학회지
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• 제1권2호
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• pp.166-170
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• 1993

남부지방(南部地方)의 율무 재배체계(栽培體系) 확립(確立)을 위한 기초(基礎) 자료(資料)를 얻고자 재식밀도(栽植密度) 차이에따른 생육(生育)과 수량(收量)을 검토(檢討)했던바 다음과 같은 결과(結果)를 얻을 수 있었다. 1. 초장(草長), 경직경(莖直徑), $1m^2$ 당(當) 경수(莖數)및 $1m^2$ 당(當) 엽수(葉數) 등의 모든 형질(形質)이 $60{\times}15cm$ 재식(栽植)에서 가장 우수(優秀)하였다. 2. 100립당(粒重), 1 l 당(重), 건경중(乾莖重)및 종실종(種實種)등의 수량(收量)이 $60{\times}15cm$ 재식(栽植)에서 가장 우수(優秀) 하였다. 3. 재식밀도(栽植密度)와 품종간(品種間)에 따른 농업형질(農業形質) 들의 분산분석(分散分析) 에서도 유의성(有意性)이 인정되었다.

• 한국작물학회지
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• 제37권1호
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• pp.54-58
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• 1992

남부지방의 재배 체계 확립을 위한 기초자료를 얻고자 vinyl 피복과 무피복재배하에서 재식밀도 차이에 따른 생육과 수량을 조사했던바 다음과 같은 결과를 얻을 수 있었다. 1. 경장, 경직경, 분지수, m$^2$당 내수, 내당립수 등의 모든 형질이 vinyl 피복구에서 우수하였으며 m$^2$당 내수는 vinyl 피복구에서나 무피복구에서나 60$\times$15cm 재식에서 가장 우수하였다. 2. 천립중과 종실수량 역시 vinyl 피복구에서 높았으며 종실수량은 vinyl 피복과 무피복 모두 60$\times$15cm 재식에서 가장 우수하였다. 3. vinyl 피복과 무피복 상태에서 재식밀도 차이에 따른 농업형질들의 분산분석에서도 유의성이 인정되었다.

• 한국지형학회지
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• 제27권3호
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• pp.105-121
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• 2020

There has been a lot of controversy over the claim that ancient characters were engraved on a stone plane collected near the Samsin Mountain in Hadong-gun, and that it was used as an altar based on the contents on the stone. The importance of the role of geoscience in prehistoric petroglyph research was presented through analysis and comparison with representative domestic petroglyphs. First, by examining the geological formation process of the collected stone objects, it proved that prehistoric actions were not applied. Second, as a result of comparative analysis from the viewpoints of human geography and topography with representative petroglyphs in Korea, it is unreasonable to argue that the stone was made for an altar. Third, it is considered that among the ancient characters under debate, the straight line indicates a cleavage of carbonate minerals, and the curved shape results from the growth of lichens. Finally, we propose that reproducing the lines found on the stone was impossible by using ancient techniques, and that there was no trace of any artificial actions applied to the spots considered to be curved characters. As shown in such research cases, the results of petroglyph research will have high reliability, if research by experts in each field continues after the geoscientific basis is secured. In this respect, the contribution of Earth science to cultural assets and archeology is expected to increase in the future.

• 한국작물학회지
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• 제25권3호
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• pp.59-62
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• 1980

본시험은 우리나라 환경하에서 생육시기에 따른 도복정도가 유채의 수양 및 주요형질에 미치는 영향을 구명하기 위하여 현장여품종인 용당과 목포29 호를 공시하여 개화전, 개화후 성숙전에 75$\circ$, 45$\circ$, 15$\circ$ 도복처리, 하여 수행하였다. 기결과 도서시기가 빠를수록 도복정도가 클수록 수량 등 대부분의 주요형질에 미치는 영향은 매우 컸다. 인위적으로 도복이 심하게 발생한 구에서 초장, 분지수는 증가하는 반면, 천입중, 협수 입수는 감소하여 종실수량에서 평균 29%의 감수를 나타냈다. 특히 개화전의 75$\circ$도복구는 대조구보다 평균 약60%의 수량감소를 보였다. 따라서 유채에서의 도복방지연구는 함으로 생육량이 큰 다수성 F_1 품종의 육성 보급을 위해 종합적으로 연구가 뒷받침 되어야한다고 사료된다.

• 한국연초학회지
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• 제14권1호
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• pp.12-23
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• 1992

This experiment was conducted to determine the optimum dosage of gamma rays for inducing artificial mutation of several mutant characters in the flue-cured tobacco. 1) In Hicks and BY 104, the gammarays irradiation has no significantly different effect on seed germination from the control. However, the average dosage for 50% growth inhibition was 25-30kr for all the varieties tested, which inhibition 46-52% and 43-57% of the seedling growths for Hicks and BY 104, respectively. 2) A mutant line 83H-5 was selected from Hicks by irradiation gamma ray at the level of 30kr. It has white flower, more resistance to bacterial wilt, Pssudomonas solanacearum, lower plant and stalk height, narrower leaf width, larger leaf shape index(lento width) and later days to flower when compared with the original variety Hicks. 3) White flower was recessive to pink flower in F, and Br (F1 X Hicks) progenies. F2 population of the cross gave segregation ratio of 3 pink flower:1 white flower, and B, (F1 X 83H-5) Population gave 1:1 ratio. Results showed that the white flower character is governed by a single recessive gene.

• 한국잠사곤충학회지
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• 제19권1호
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• pp.9-13
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• 1977

누에의 인공사료에 첨가하는 cellulose의 종류별 제제방법별 및 첨가량별로 사육시험을 행한 결과를 요약하면 다음과 같다. 1. 공시한 cellulose 중에서는 뽕나무 cellulos가 잠체중과 견층비율이 높고 감잠비율은 낮으며 경과일수도 짧아서 가장 우수하고 그 다음이 소나무 cellulose로서 뽕나무 cellulose와 거의 비슷한 사육성적을 나타내었다. 2. Cellulose조제방법은 PA법이나 NaOH처리법이나 서로 비슷한 사육성적을 나타내었으며 cellulose원에 따른 차이도 거의 인정되지 않았으나 무처리 cellulose는 극히 불량하였다. 3. 인공사료에 첨가하는 cellulose의 양은 건물사료의 15∼22.5%범위가 적당한 것으로 나타났다.

• 농업생명과학연구
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• 제45권5호
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• pp.1-8
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• 2011

In this study, 160 tea tree (Camellia sinensis L.) lines were classified by caffeine content using colorimetric methods. Among them, caffeine-rich lines (HR-78, HR-137, HR-82 and HR-123) and poor lines (HP-85, HP-88, HP-19, and HP-131) were selected. To know the difference in morphological and genetic characters between caffeine-rich and poor lines, we used leaf/shoot growth and RAPD methods. Cluster pattern of morphological characters (leaf width, leaf length, leaf area and shoot length) showed that shoot length was longer in caffein-rich lines than in -poor lines. In genetic analysis, amplified DNA bands having various sizes were detected in RAPD analysis where 30 random primers were used. However, the discriminated primer set that distinguish caffein-rich tree line from -poor lines was not found. These results can be used as the basic data to determine the morphological and genetic differences among caffein-rich and -poor lines.

• 디지털융복합연구
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• 제17권6호
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• pp.335-340
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• 2019

미디어의 발달과 함께 다양해진 유저의 플랫폼 및 기술적 환경을 동시에 충족시키는 게임 콘텐츠를 디자인하는 것은 매우 어려운 문제이다. 온라인 플랫폼과 네트워킹을 기반으로 성장한 인디게임 분야는 자본의 개입으로부터 자유로운 만큼 다양하고 창의적인 게임 콘텐츠 개발의 시도가 활발하게 이루어졌고, 행동 자율성이 높으며 커스터마이징이 가능한 샌드박스형 게임이 큰 성공을 거두면서 더욱 성장해 나갔다. 본 논문에서는 인디게임을 주도하는 샌드박스형 게임의 성장에 있어 큰 특징적 요소로 사료되는 행동 자율성과 커스터마이징 시스템에 주목하였다. 표현기법으로써 3D 복셀 그래픽이 자주 채택되고 있다는 점에서 복셀 기반 그래픽의 유용성 및 특히 게임 캐릭터 구현에 대한 현황과, 효율적인 게임 그래픽 기법으로 활용될 수 있는 가능성을 연구해 보기로 한다.