• Title/Summary/Keyword: 실생(종자번식)

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Using Air Temperature and Sunshine Duration Data to Select Seed Production Site for Eleutherococcus senticosus Max (기온과 일도시간 분석에 의한 가시오가피의 파종적지 선정)

  • 박문수;김영진;박호기;장영선;이중호
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.40 no.4
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    • pp.444-450
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    • 1995
  • It was very hard to gather the seeds of Eleutherococcus senticosus Max. known as a medicinal plant for they tend to drop under the high temperature condition during the summer period in Korea. Therefore, this study was conducted to select seed production site for Eleutherococcus senticosus in Korea, comparing the climate of Hokkaido of Japan, in which the seeds have been produced, with that of various place in this country. It was low that the average maximum temperature during the hottest summer two months (July and August) as a 24.4$^{\circ}C$ in Hokkaido and 21.2$^{\circ}C$ in Daegwanryeong compared with 27.4$^{\circ}C$ in Changsu. Especially in Daegwanryeong, average maximum temperature from June to September remained as low as 21$^{\circ}C$. Effective accumulated temperature(>5$^{\circ}C$) was 807$^{\circ}C$ in Hokkaido and 964$^{\circ}C$ in Daegwanryeong during the ripening period. Monthly sunshined hours from July to August were 121.7~128 hours in Daegwanryeong and 83.5~85.4 hours in Hokkaido. The Eleutherococcus senticosus sprouts at 8.5$^{\circ}C$, comes to flowering season in mid-August, and ripens during late-August and October in Hokkaido, the climate of which is similar to that of Daegwanryeong.

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Rhizome Growth and Flowering of White Lotus (Nelumbo nucifera) at Muan Hoesan-Lake (무안 회산지(回山池) 백련꽃의 근경생장과 개화특성)

  • Im, Myung Hee;Park, Yong Seo;Hou, Won Noung;Park, Yun Jum;Heo, Buk Gu
    • FLOWER RESEARCH JOURNAL
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    • v.17 no.1
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    • pp.15-22
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    • 2009
  • This study was conducted to examine characteristics of rhizome growth and flowering of white lotus (Nelumbo nucifera) plant in Muan Hoesan-lake for collecting the basic data on the cultivation and the flowering which is growing in Muan Hoesan-lake of Jeonnam province in Korea. We have planted from the seeds and the enlarged rhizomes of the white lotus which were planted in the plastic containers on April 20 and May 4, 2008, and cultivated under rain shelter condition. Rhizome growth pattern and the flowering characteristics of the white lotus were examined on September 4, 2008. Main rhizomes of the white lotus propagated by the seeds and the enlarged rhizomes were branched by 10% and 15%, respectively. Numbers of nodes in the bloomed and non-bloomed rhizomes of the white lotus were over 14 and below 11, respectively. Flower was not observed in the white lotus when propagated with seeds, however, flowers came out up to 80% by the enlarged rhizomes. First flowers were bloomed from the late July and to the early August, and the number of flowers were 4.0~4.4. The first flower stalks without branching of the main rhizome were emerged in 8.8th node, however, that with branching were 8.0th node. Time to flowering from the emergence of flower stalk on the above-ground parts were required 16 days. White flowers from the lotus were 15.3 cm in height and 28.2 cm in width, their longevity was 3.3 days and the averaged flower fresh weight was 29.2 g. The results conclude that optimum number of nodes on the main rhizomes for blooming the white lotus flowers should be over 8 nodes before the rhizome enlargement.

Effect of Temperature and Various Pre-treatments on Germination of Hippophae rhamnoides Seeds (갈매보리수나무 종자의 온도 및 여러 가지 전처리에 따른 발아반응)

  • Choi, Chung-Ho
    • Korean Journal of Plant Resources
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    • v.25 no.1
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    • pp.132-141
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    • 2012
  • This study was carried out to test seed germination responses to temperatures and pre-treatments in Hippophae rhamnoides, which has many abilities in antioxidant activity, soil improvement and erosion control. H. rhamnoides seeds were placed at 10, 15, 20, 25, 30 and $35^{\circ}C$ under light condition. As the results, germination percentage (GP) was the highest at 15 and $20^{\circ}C$, and mean germination time (MGT), germination rate (GR) and germination value (GV) were the highest at $25^{\circ}C$. Quadratic and linear regression model were used to determine the cardinal temperatures such as base ($T_b$), maximum ($T_m$) and optimum ($T_o$) temperature for germination. In quadratic regression model using PG, $T_b$, $T_m$ and $T_o$ was estimated as 0.6, 36.4 and $18.5^{\circ}C$, respectively, and temperature range for germination was $35.8^{\circ}C$. In linear regression model using GR, $T_b$, $T_m$ and $T_o$ was estimated as 8.3, 35.4 and $25.3^{\circ}C$, respectively, and temperature range for germination was $27.2^{\circ}C$. Germination properties were investigated after H. rhamnoides seeds were treated by prechilling (1, 2, 4, 6 and 8 weeks), stratification (2, 4, 6 and 8 weeks), solid matrix priming (seed : carrier : water = 5 : 1 : 7, 8, 9 and 10), osmo-priming (-0.25, -0.5, -1.0 and -1.5 MPa) and calcium chloride ($CaCl_2$) -priming (100, 200, 300 and 400 mM). The highest GP was observed in $CaCl_2$ 300 and 400 mM treatments, and MGT was the shortest in stratification 6 and 8 weeks treatments. GR and GV were the highest and GP was the second highest when seeds were prechilled for 1 and 2 weeks. Consequently, prechilling 1 or 2 weeks treatment was considered as the appropriate method when we contemplate qualitative and quantitative effects in seedling production.

A New Cultivar 'Daemang' with Long Red Eye Spot and Large Flower by Interspecific Cross of Hibiscus Species (무궁화 종간교잡을 통한 홍단심계 신품종 '대망' 육성)

  • Ha, Yoo-Mi;Kim, Dong-Yeob;Han, In-Song
    • Horticultural Science & Technology
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    • v.28 no.4
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    • pp.711-714
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    • 2010
  • A new cultivar 'Daemang' ($Hibiscus$ hybrid 'Daemang') originated from the interspecific cross between $Hibiscus$ $sinosyriacus$ 'Seobong' and $Hibiscus$ $syriacus$ 'Namwon' to improve the flower quality in 2001. 'Daemang' was preliminarily selected as 'R-143' in 2003 for its stable flower quality with long red eye spot and named in 2006. The tree habit shows vigorous growth and is upright, so it can be used as a specimen tree or street tree. Characteristic tests such as leaf shape, leaf size, flower characteristics, flowering, and capsule size were conducted from 2004 to 2006. The characteristics succeed after grafting. 'Daemang' had pink color flower with red eye spot. The width of flower is 15.2 cm. Petal length and width are 8.0 cm and 6.4 cm, respectively. Leaves are 9.49 cm long and 8.72 cm wide. After the plant characteristics evaluation for 3 years (2004~2006), it was registered as a variety 'Daemang' in 2008.

'Duo', White Gladiolus with Pink Core (백색의 분홍 화심 글라디올러스 '듀오' 육성)

  • Cho, Hae Ryong;Goo, Dae Heo;Rhee, Hye Kyung;Lim, Jin Hee
    • FLOWER RESEARCH JOURNAL
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    • v.19 no.4
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    • pp.264-268
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    • 2011
  • 'Duo', a late-flowering white gladiolus with pink core, was released by the National Institute of Horticultural & Herbal Science (NIHHS) in 2000. The selection was derived from the cross between the progenies of the early flowering dark pink 'True Love' and bright pink domestic cultivars 'Madame Valdiek'. The breeding was conducted in 1996 and selected finally in 2000 after four years (1997 to 2000) of experimentation. 'Duo' is a cut flower with bright white color petals and Pink core which exhibited late flowering and vigor without stem bending. It can be cultivated in areas or regions with strong winds during summer. 'Duo' has a very firm growth form and sturdy branches which do not bend when planted in the open fields. Likewise, the plant showed high tolerance to flooding and resistance, hence, could grow vigorously in open areas. It is a fast- growing plant which exhibits high corm production rate. 'Duo' had a 12.2 cm wide flower and 150 cm plant height. During summer, the average number of days to flowering was recorded at 75 days of 'Duo'. Top dressing must be conducted once or twice during corm production to enhance corm quality and quantity.

Development and Prospective of Day-neutral Strawberry Cultivars for Year-round Production (딸기 연중생산을 위한 중일성(Day-neutral) 품종 개발과 전망)

  • Jong Nam Lee;Do Yeon Kim
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2023.04a
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    • pp.3-3
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    • 2023
  • 우리나라 딸기는 시설재배 발전과 품종개발로 겨울을 대표하는 과일로 변신하였다. 이는 저온단일에서 꽃이 만들어져 착과되는 생태적(일계성)특성 때문이다. 우리나라의 딸기 정식기는 95%이상이 촉성작형으로 9월 중순 정식한 후 11월 하순부터 이듬해 5월 하순까지 약 6개월간 수확한다. 반대로 여름작형은 고온장일에서 꽃이 만들어져 착과되는 사계성 품종을 이용하는데 우리나라 500m 이상의 산간 고랭지에서 3-4월에 정식한 후 6월부터 11월까지 수확하지만 생산량은 전체의 0.3% 미만이다. 또한 여름딸기는 제과용으로만 사용되고 있어 6월부터 11월 사이에 신선딸기의 단경기가 발생된다. 이러한 문제를 재배적으로 해결하기 위해 일계성 품종을 이용하여 겨울부터 봄까지 포기냉장한 후 여름과 가을에 꺼내어 정식하면 45일 내외에 수확하는 주냉장 억제작형을 시도하였으나 우리나라에선 실용성이 떨어져 사라져간 기술이다. 그러나 네덜란드는 우리나라와 같은 주냉장기술을 활용(Waiting bed system, Table top system)하여 여름과 가을철에도 딸기를 생산하고 있다. 이 작형은 냉장기간이 길고 재배기술도 까다로울 뿐만아니라 1화방만 수확하여 수량성이 낮은 단점이 있다. 한편 미국에서는 일계성 품종이 품질은 좋으나 고온기에 꽃대발생이 어렵고 사계성은 품질이 떨어지는 단점을 극복하기 위해 일장의 길이와 관계없이 꽃대가 형성되는 중일성 딸기 품종을 보급하여 세계적으로 가장 많은 재배면적을 점유하고 있다. 연중생산이 가능한 중일성 품종을 개발하기 위해 먼저 유전자원을 수집하였고 품질이 좋은 일계성 품종을 중일성 품종과 교배하여 채종하였다. 교배종자를 파종하여 묘를 만든 후 정식하여 실생개체를 선발한 결과 고온장일 조건에서 개화되는 사계성(중일성)율은 약 10-20% 범위로 매우 낮았다. 선발된 우량계통은 영양번식을 통해 증식하여 생산력, 특성, 지역적응성 검정과정을 통해 품종을 개발하였다. 이렇게 단교잡에 의한 중일성 품종 선발육종은 선발율이 0.05%으로 매우 낮았다. 이렇게 우리나라 최초의 중일성딸기 '고슬' 품종이 개발되었다. 이 '고슬'은 9월부터 수확이 가능한데 이 때의 딸기 가격이 kg당 20,000원 이상으로 높으며, 수확기간은 '설향'보다 4개월 더 길게 재배가 가능하다. 연중재배를 위해서는 항상 8-25℃의 범위을 유지해야 품질이 높아지므로 재배관리가 중요하다. 흰가루병에는 저항성이 있으나 시들음병과 탄저병에는 약하고 당도와 경도가 높고, 향이 매우 진하다. 식물공장에서 매우 인기가 있는데 안정된 꽃대발생과 대과, 고당도와 함께 수술의 화분량이 많아 수정이 잘되는 특성으로 식물공장 사업이 확장되고 있는 중동나라에서도 로열티 계약(UAE 등)이 예정되어 있다. 1년 연중 개화되고 착과되는 특성으로 가정에서 기르는 반려식물로도 인기가 있다. 또한 아열대 고랭지대는 항상 서늘한 날씨이기 때문에 한번 정식후 1년 연중생산이 가능하여 2023년 베트남과 로열티 계약(1.6억원)을 하였다. 또한 '고슬'은 우리나라 신선딸기 수출 단경기에 생산되어 주년생산 수출체계에도 기여할 것으로 본다.

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