• 한국연초학회지
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• 제4권2호
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• pp.31-36
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• 1982

The field evaluation were conducted on dihaploid progenies derived from anther culture of F1 plant of Drama x Sohyang (N. tabacum L.) The mean values of agronomic and chemical traits of dihaploids such as Nicotine, length/width, plant height, Leaf length, leaves per plant and Yield were greater than those of tar parents. The correlation coefficient of dihaploids were similar to those of conventional lines and varieties. In path analysis, in relating yield components to yield, leaves per plant and leaf width had a direct effect on Yield, but the other components such as plant height, leaf length and days to flowering influenced Yield indirect way.

• 한국초지조사료학회지
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• 제20권2호
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• pp.91-96
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• 2000

This research was concluded under dryland condition in Thrace region in 1994-1995 growing season. This experiment was arranged in randomised block design with three replications. Yield and some important yield components (plant height, number of pods per plant, number of seeds per pod and 1000 seed weight) were determined. According to the results, it can be concluded that the best sowing rate and row distance of chickling vetch for the region are $100\;seed/\textrm{m}^2$ and 20 cm, respectively.

• 한국작물학회지
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• 제51권1호
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• pp.48-52
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• 2006

Naturally occurring soybean isoflavones are known to be influenced by various genetic and environmental conditions. Growth, yield, and isoflavone content were determined in four different cultivars of soybean grown under drained paddy and upland fields. Most of growth characteristics and yield components of four different soybean cultivars harvested in drained paddy field were greater than those in upland field, regardless of cultivar. By means of high performance liquid chromatography, total daidzein and genistein contents of soybean in drained paddy field were increased up to 40 and 35%, respectively, compared with those in drained paddy field. Besides isoflavone contents, the growth and yield of soybean were significantly affected by cultivar and field conditions, indicating the necessity of genetic program for soybean cultivars appropriate to drained paddy field conditions. In conclusion, converting paddy field into upland may effectively improve soybean cropping system, especially in terms of isoflavone increment under paddy field conditions.

• 한국초지조사료학회지
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• 제35권3호
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• pp.217-224
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• 2015

This study aimed to investigate the effects of Dandelion (Taraxzcum coreanum) supplementation on milk yield, milk composition and blood characteristics in lactating dairy cows. Eight lactating dairy cows were divided into two groups (control: TMR supplementation, treatment: TMR with Dandelion supplementation). The milk yield, milk fat, lactose, solids not fat (SNF) and somatic cells counts (SCC) were not significantly different between the control group and the treatment group, whereas milk protein, milk urea nitrogen (MUN) and free fat acid (FFA) were significantly higher in the treatment group compared to the control (p<0.05). The blood components of the treatment group were compared with those of the control group and only aspartate aminotransferase (AST) appeared significantly high (p<0.05). The other blood components were not significantly different in the two groups. Blood corpuscle components in the groups were not significantly different. Especially, all blood corpuscle components in the treatment group were within the normal range. However, the white blood cells (WBC), lymphocytes (LYM) and hematocrits (HCT) in the control group exceeded the normal range. Based on the above results, the addition of Dandelion to feed increased milk protein, MUN and FFA, but did not significantly affect the composition of the blood and corpuscle in Holstein milking cows.

• Plant Resources
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• 제5권2호
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• pp.104-108
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• 2002

In order to obtain basic information for selecting early maturing rice varieties which is suitable for early cropping before Alisma plantago in the southern part of Korea. Six rice varieties were grown from May to August in 2002 at Youngjeon Experiment Field, Sunchon and yield components and yield of plants were investingated. Early maturing rice cv. Grubyeo showed higher rough rice yield than any other varieties used in the experiment. It showed high yield components, such as culm length, panicle length, number of panicles per plant, number of spikelets per panicle and ratio of ripened grains. Therefore, it was concluded that Grubyeo was the most suitable variety with high yield for the cultivation before growing of Alisma plantago at the southern part of Korea. The heritability of culm length number of spikelets per panicle and rough rice yield were high and that of panicle length number of panicle per plant, ratio of ripened grain and 1,000 grain wt. of milled rice were low. According to the result of path coefficient analysis, characters highly correlated with rough rice yield showed large direct effects on rough rice yield.

• 한국자원식물학회지
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• 제19권3호
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• pp.397-400
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• 2006

The objectives of this experiment was to evaluate the effect of seeding and transplanting date on yield and quality of rapeseed experiment were conducted in the research field of Chungcheongnam Do(Taejun) Agricultural Research and Extension Services with Yudal, one of the rapeseed cultivar of different growth characteristics among the six treatments were examined and recorded. Results showed that yield components such as plant height, length of ear and pod, number of branches and pods and percentage of pod setting and seed set were highest at the plot with direct seeding in Sep. 10. In this treatment yield of seed, 1,000 grains weight and weight of $1{\ell}$ were highest. On the basis of vegetative and yield parameter of direct seeding in Sep. 10 was the best sowing date of rapeseed crop in Chungcheongnam Do region of Korea. Experiments were conducted in the research field of Chungcheongnam Do(Taejun) Agricultural Research and Extension Services with Yudal variety, which showed different growth characteristics. Yield components such as plant height, length of ear and pod, number of branches and pods and percentage of pod setting and seed set were highest at the plot with direct seeding in Sep. 10. Yield of seed, 1,000 grains weight and weight of $1{\ell}$ were highest at the direct seeding in Sep. 10. Judging from the results reported above, seemed to be direct seeding in Sep. 10.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.360-360
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• 2017

Morphological characteristics indicating agronomic features and yield components (trunk length, trunk diameter, thickness of bark, pith density, dry-matter percentage of pith and starch concentration in pith) of sago palms (Metroxylon sagu Rottbøll) were compared between the 27 populations grown in the islands in Southeast Asia (West Sumatra, South Sumatra, West Java, Southeast Sulawesi, Ternate, Halmahera and Seram in Indonesia) and the 20 populations grown in Melanesia (West Papua in Indonesia, East Sepik and New Ireland island in Papua New Guinea). The average starch yield calculated based on the yield components was $310kg\;plant^{-1}$ and $244kg\;plant^{-1}$ in the islands in Southeast and Melanesia, respectively. The variation of starch yield in Melanesia (CV: about 80%) was larger than that in the islands in Southeast Asia (CV: about 60%). The difference in starch yield in the islands in Southeast Asia was mainly attributed to the trunk diameter breast height and the dry-matter percentage of pith. In contrast, the differences in trunk length and dry-matter percentage of pith mainly accounted for the difference in starch yield in Melanesia. The sago palms in the islands in Southeast Asia had a comparatively thick and short trunk and those in Melanesia had a comparatively thinner and longer trunk. However, the average pith dry-matter yield was almost same level as $400kg\;plant^{-1}$ in both the islands in Southeast Asia and Melanesia. The difference in starch yield between the two areas was attributed to the difference in starch concentration in pith, 77% and 58% in the islands in Southeast Asia and Melanesia, respectively.

• 한국작물학회지
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• 제30권1호
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• pp.84-92
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• 1985

보리품종 강보리, 올보리 및 수원 18호를 공시하여 파종기를 달리하였을때의 생육시기별 주요생태 및 수량구성형질의 변이에 관한 일련의 시험을 수행한바 그 결과를 요약하면 다음과 같다. 1. 출아일수는 연차 및 파종기에 따라 7 $\pm$ 1 ~ 22 $\pm$ 7 일의 변이를 보였으며, 일평균 지중5cm의 온도와는 고도의 부의 상관관계가 있었다. 2. 유수는 파종기에 관계없이 영화분화후기(X기)를 기점으로 급신장하여 출수기를 전후하여 완료하였는데 신장정도는 연차나 품종간 차이보다는 파종기의 조만이 더 크게 영향하였다. 3. 절간은 소수분화후기~영화분화전기에 걸쳐 신장을 개시하여 기부절간에서 상부절간에 이르는 단계적인 신장양상을 보였고 상부절간일수록 신장량도 많았다. 4. 초장의 중장에 따른 유수 및 절간의 신장경과는 초장이 20cm전후에서 유수장은 0.69~0.74mm이고 하부의 제4,5절간이 신장을 시작하였으며, 40cm에서 유수장은 10.2~18.6mm였으며 이때 전체절간의 신장양상을 보였다. 5. 수량구성요소인 수수는 파종기, 품종 및 연차의 순으로 영향하는 정도가 큰데 비하여 일수입수와 천립중은 연차, 품종 및 파종기의 순으로 이들 요소의 제한요인이 상이하였다. 6. 수량은 연차나 품종간에는 유의차가 없었으나 파종기차이에서는 고도의 유의성이 인정되었다.

• 한국작물학회지
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• 제37권3호
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• pp.250-256
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• 1992

완두의 다수성 우량 품종 육성을 위한 유전적 기초정보를 얻고자 11개 주요 형질을 대상으로 특성이 다른 7개 품종을 이면교잡한 후 교배친과 F$_1$의 양적형질에 대한 조합능력 및 잡종강세를 추정한 결과를 요약하면 다음과 같다. 1. 형질들의 잡종강세 정도는 주당립중이 78.9%로 가장 높았으며, 주당립수, 주당래수의 수량형질과 경장, 경직경 및 분지수 등의 형태적 형질에서는 각각 높은 heterosis를 보였다. 2. 조합능력을 검정한 바, 전 형질에서 유의한 GCA 및 SCA를 보여, 이들 형질은 상가적 효과와 비상가적 효과가 작용함을 알수 있었고, 일반조합능력의 분산량이 특정조합능력의 분산량보다 크게 나타났다. 3. 각 품종에 따라 GCA 효과를 볼 때 Alserman이 수량과 수량구성요소에서 높은 효과를 보여 다수성 품종육종의 모본으로서 유망한 품종으로 인정되었다. 5. 교배조합별 SCA 효과는 Sugar Ann$\times$Alderman, Wando$\times$Alderman, JI 1198$\times$진주006의 조합들이 수량 및 수량구성요소에서 높았다.

• Plant Breeding and Biotechnology
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• 제5권3호
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• pp.237-242
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• 2017

AT-hook proteins of plant have shown to be involved in growth and development through the modification of chromatin architecture to co-regulate transcription of genes. Recently, many genes encoding AT-hook protein have been identified and their involvement in senescence delay is investigated. In this study, soybean transgenic plants overexpressing chromatin architecture-controlling ATPG7 gene was produced by Agrobacterium-mediated transformation and investigated for the positive effect on the important agronomic traits mainly focusing on yield-related components. A total of 27 transgenic soybean plants were produced from about 400 explants. $T_1$ seeds were harvested from all transgenic plants. In the analysis of genomic DNAs from soybean transformants, ATPG7 and Bar fragments were amplified as expected, 975 bp and 408 bp in size, respectively. And also exact gene expression was confirmed by reverse transcriptase-PCR (RT-PCR) from transgenic line #6, #7 and #8. In a field evaluation of yield components of ATPG7 transgenic plants ($T_3$), higher plant height, more of pod number and greater average total seed weight were observed with statistical significance. The results of this study indicate that the introduction of ATPG7 gene in soybean may have the positive effect on yield components.