• FLOWER RESEARCH JOURNAL
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• v.18 no.1
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• pp.73-76
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• 2010

A new light pink spray-mum, 'Brown ND' was bred by crossing between 'Noeul', a yellow anemone type flower, and 'Dalma', a pink anemone type flower in October 2003. The growth and flowering characteristics were investigated in forcing, natural, and retarding cultures from 2005 to 2007. The 'Brown ND' was a medium-flowering fall-mum with light pink anemone type flower and had 10.6 flowers per stem, 4.1 cm diameter of flower in natural culture. The number of days to flowering and flowers per plant was 59 and 9.1, respectively, in forcing culture of 'Brown ND' whereas the number of days to flowering was 49 in retarding culture.

• FLOWER RESEARCH JOURNAL
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• v.18 no.1
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• pp.77-81
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• 2010

A new white spray-mum, 'White Ball' was bred by crossing between 'Stallion', a white anemone type flower, and 'Hyangno', an anemone type with pink petals in October 2003. The growth and flowering characteristics were investigated in forcing, natural, and retarding cultures from 2005 to 2007. The 'White Ball' was a medium-flowering fall-mum with white anemone type flower and had 16.2 flowers per stem, 3.6 cm diameter of flower in natural culture. The number of days to flowering and flowers per plant was 58.5 and 11.9, respectively, in forcing culture of 'White Ball' whereas the number of days to flowering was 54 in retarding culture.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.83-83
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• 2022

유채(Brassica napus L.)는 가을에 파종하여 이듬해에 초여름에 수확하는 겨울작물로 종실 수량이 많고 종자의 조지방 함량이 높아 주로 기름을 생산하기 위해서 재배되고 있다. 우리나라에서 유채는 경관을 목적으로 주로 재배되며 면적은 약 5,000ha 정도 재배되고 있다. 최근에는 유채유 생산을 목적으로 전남 등 남부지방에서 재배면적이 증가하고 있다. 유채유의 대량 생산을 위해서는 재배과정의 생력기계화에 유리한 논 재배가 주로 이루어지고 있다. 따라서 유채의 육종은 논 재배 적응성이 뛰어나며, 벼와의 작부가 가능하며 봄 파종 재배가 가능한 조숙품종의 육성이 필요하며, 식용유로 이용이 가능한 지방산 조성이 우수한 품종의 육성도 필요하다. 본 연구는 농촌진흥청 농업유전자원센터에서 보유하고 있는 유채 유전자원 350점을 대상으로 작물학적 생육특성을 평가하였고 종자를 수확한 후 지방산 조성을 분석하였다. 생육특성은 경장 등 12항목을 유채 유전자원 특성조사 및 관리요령(RDA, 2011)을 기준으로 조사하였다. 가을에 파종하여 재배할 때 개화소요일수는 파종 후 137일부터 210일까지 소요되었으며, 봄 파종 재배 시에는 파종 후 65일부터 150일까지 개화가 진행되었고 개화가 되지 않은 계통이 67계통이었다. 경장은 85 ~ 211cm, 수장은 28 ~ 79cm, 분지수는 5 ~ 21개, 수당 협수는 29 ~ 106개, 협당 종자수는 18 ~ 35개 및 협장은 2.7 ~ 8.8cm로 다양하였다. 유채 유전자원의 지방산 중 올레산과 에루스산 함량은 각각 9.7 ~ 70.4% 및 0 ~ 54.7% 범위였다. 공시계료 중 IT 279089 등 3자원은 개화기가 빨라 조생종 육성에, IT279125 등 3자원은 올레산 함량이 68%이상으로 양질 지방산 품종 육성재료로 활용할 예정이다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.84-84
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• 2022

백리향(Thymus quinquecostatus)은 꿀풀과의 낙엽반관목으로 국내에서 자생하는 허브 식물 중 하나이다. 백리향은 특유의 좋은 향기 및 항산화, 항염증, 항균, 미백 등의 효능을 가지는 각종 폴리페놀 성분을 함유하고 있어 의약품이나 기능성 식품, 화장품의 천연 소재 원료로 활용되고 있다. 국내에서 백리향은 재배 환경에 맞추어 주로 고산지대의 노지에서 재배되고 있다. 노지 재배는 지역, 시기, 기후 등의 외부환경에 영향을 받아서 백리향의 유효성분, 품질 및 생산성을 안정적으로 유지하기 어렵다는 한계를 가지고 있다. 따라서 본 연구에서는 스마트팜 시스템을 활용하여 백리향의 유효 성분 등을 안정적으로 얻기 위한 생장조건을 탐색하기 위해 4종의 Light Emitting Diode(LED) 광원과 4종의 토양 조성에 따라서 백리향의 생육조건을 수행하였다. LED는 white, purple, RGB1, RGB2를 사용하였으며, 토양은 상토:펄라이트 비율(상토, 5:1, 3:1, 1:1)로 조성하여 백리향 묘목을 이식한 뒤 생장과 개화시기를 분석하였다. 재배환경은 백리향 재배지의 기상 데이터를 참고하여 동일하게 설정하였으며, 총 8주 동안 생육상태를 관찰하였다. 연구 결과 백리향 재배 4주차에 일부 개체에서 봉오리가 올라오며 개화를 시작하였으며, 8주차에는 대부분의 조건에서 개화를 관찰할 수 있었다. 백리향의 지상부 면적을 비교한 결과 가장 우수한 생장을 보이는 조건은 토양은 3(상토):1(펄라이트) 비율로 분석되었다. 따라서 이번 연구 결과를 바탕으로 백리향 재배에 스마트팜 농업 기술을 활용한다면 기존 노지 재배 한계를 보완하여 안정적이고 지속적인 백리향을 생산할 수 있을것으로 기대된다.

• FLOWER RESEARCH JOURNAL
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• v.17 no.3
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• pp.179-184
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• 2009

The correlation and combining abilities related with plant spreading characteristics of plant height, plant width, stem length, internode length, number of stem, number of leaves, and number of flower were studied in the $F_1s$ of 10 crosses from the partial five-parent diallel cross in Petunia hybrida. The plant width showed highly positive correlation with internode length, and number of flower. The mean squares of general combining ability(GCA) and specific combining ability(SCA) were highly significant for plant width, number of stem, number of leaves, and number of flowers. The mean square values of GCA were greater than those of SCA for all the characters, showing preponderance of additive gene actions for these characters. The lines of D and I for plant width and length of stem showed relatively high GCA effects. The crosses of $D{\times}I$, $F{\times}I$, and $G{\times}I$ exhibited high SCA effects on plant width, especially $G{\times}I$ effected in internode length and number of flower. The broad sense heritability was generally high compared to narrow sense one. Plant width and stem length, and internode length related to spreading growth showed the higher heritability than the other characters in the broad and narrow sense.

• Journal of The Korean Society of Grassland and Forage Science
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• v.24 no.2
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• pp.105-114
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• 2004

This pot experiment was. conducted to investigate the effects of systematic variation application of Fe, Mn, Cu, and Zn on forage performance of orchardgrass and white clover. The treatments of systematic variation were 0/100, 25/75, 50/50, 75/25, and 100/0％ in the Fe/Cu(trial-1), Mn/Zn(trial-2), and Fe + Cu/Mn + Zn(trial-3), respectively. The treatments of Fe/Mn/Cu/Zn(trial-4) were composed of 70％ in main element and 10％ in other 3 elements, respectively. 1. In general, the unbalanced applications of Fe and Mn resulted in the Mn and Fe deficiencies(chlorosis) on white clover, respectively, because of the antagonism between Fe and Mn. In white clover, the traits of growth, root/nodule, and flowering, which were influenced by the systematic variation of Fe, Mn, Cu, and Zn, were closely correlated to each other. In the Fe/Cu trial, the 0/100 and 25/75 induced a Fe-deficiency on white clover, and the 0/100 also showed poor root growth and flowering. In addition, the 50/50 and 75/25 showed an early flowering of white clover. 2. In the Mn/Zn trial, the 0/100 induced a severe Mn-deficiency(chlorosis) on white clover. The 25/75 and 50/50, however, diminished the chlorosis symptom. The 75/25 and 100/0 showed generally good root growth and flowering of white clover. 3. In the Fe + Cu/Mn + Zn trial, the 0/100 induced a Fe-deficiency, and the 100/0 induced a Mn-deficiency on white clover, which were correlated to the poor root growth and flowering. The 75/25 showed good root growth and flowering of white clover. 1be flowering of white clover tended to be more influenced by the Fe + Cu than by the Mn + Cu ratios. 4. In the Fe/Mn/Cu/Zn trial, the Fe and Mn deficiencies on white clover, which were influenced by the Mn and Fe treatments, also occurred. The Cu and Zn-deficiency symptoms, however, were not recognized. General differences have been showed in the numbers of flowers as following orders; Zn > Cu > Mn > Fe - 70% treatments.

• Landscaping Tree
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• v.60 no.1_2
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• pp.32-36
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• 2001

• Korean Journal of Agricultural and Forest Meteorology
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• v.11 no.2
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• pp.61-71
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• 2009

Most deciduous trees in temperate zone are dormant during the winter to overcome cold and dry environment. Dormancy of deciduous fruit trees is usually separated into a period of rest by physiological conditions and a period of quiescence by unfavorable environmental conditions. Inconsistent and fewer budburst in pear orchards has been reported recently in South Korea and Japan and the insufficient chilling due to warmer winters is suspected to play a role. An accurate prediction of the flowering time under the climate change scenarios may be critical to the planning of adaptation strategy for the pear industry in the future. However, existing methods for the prediction of budburst depend on the spring temperature, neglecting potential effects of warmer winters on the rest release and subsequent budburst. We adapted a dormancy clock model which uses daily temperature data to calculate the thermal time for simulating winter phenology of deciduous trees and tested the feasibility of this model in predicting budburst and flowering of Niitaka pear, one of the favorite cultivars in Korea. In order to derive the model parameter values suitable for Niitaka, the mean time for the rest release was estimated by observing budburst of field collected twigs in a controlled environment. The thermal time (in chill-days) was calculated and accumulated by a predefined temperature range from fall harvest until the chilling requirement (maximum accumulated chill-days in a negative number) is met. The chilling requirement is then offset by anti-chill days (in positive numbers) until the accumulated chill-days become null, which is assumed to be the budburst date. Calculations were repeated with arbitrary threshold temperatures from $4^{\circ}C$ to $10^{\circ}C$ (at an interval of 0.1), and a set of threshold temperature and chilling requirement was selected when the estimated budburst date coincides with the field observation. A heating requirement (in accumulation of anti-chill days since budburst) for flowering was also determined from an experiment based on historical observations. The dormancy clock model optimized with the selected parameter values was used to predict flowering of Niitaka pear grown in Suwon for the recent 9 years. The predicted dates for full bloom were within the range of the observed dates with 1.9 days of root mean square error.

• Korean Journal of Medicinal Crop Science
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• v.13 no.3
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• pp.114-117
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• 2005

Orostachys japonicus, called Wasong as herbal medicine and a short day plant, should be artificially kept in long daylength to control anthesis of its florets. The study was done to clarify the effect of daylength (10, 13, 16 hours a day) on growth, morphological characters, and flowering. The treatments were done on August 25 and afterward samples were taken every 2 weeks. Growth, morphological and flowering related characters were measured from each sample. With longer daylength plant height and inflorescence length were increased but number of leaves including bracts and stem diameter were decreased. Leaves and bracts, stem, root, shoot and total dry weights were increased with longer daylength from late September while floret dry weight showed reverse result. Florets formed were the greatest in daylength of 10 hours during September but the least during the other period. Anthesis of the florets was observed only in daylength of 10 hours during October and all the plants from the treatment were flowered.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.3
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• pp.241-247
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• 2020

Sesame is typically a temperature- and day length-sensitive plant, as its flowering is promoted under high temperature and shorter day length conditions. The experiment carried out in the present study revealed that day length influenced sesame flowering to a much greater extent than temperature. The degree of day length influence differed depending on the sesame variety. Days from sowing to flowering was negatively correlated with yield-related characteristics such as stem length, capsule number per plant, 1,000 seed weight, and seed weight per 10a. In cases where the period from sowing to flowering was longer and flowering date was later, the reproductive growth period was shorter during maturity. Analysis of the effects of temperature and day length on seed yield production revealed that temperature was a much more influential factor than day length. However, day length was more influential than temperature under low temperatures, such as 22℃. All varieties apart from Ansan were shown to be primarily influenced by temperature. Sesame varieties were grouped in view of optimal seed sowing time through principal components analysis. The Poongsung and Sungboon varieties favored early sowing under low temperatures and short day lengths. The DT45, Poongsung, 90 days, Ansan, and Sungboon varieties favored late sowing under high temperatures and long day lengths. The Yangbaek and Arum varieties could be sown both early and late.