• Journal of Aquaculture
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• v.13 no.4
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• pp.325-330
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• 2000

For development of all male seed production at hatchery scale, a comparative study was made on the seed production traits of supermale (IT - t) and superfemale (IT - L1 ~) Nile tilapia, Oreochromis niloticus. Supermales were crossed with normal females (XX- f) and the superfemales with normal males (XY - t ) or sex reversed males (XX- L1 t); progeny survival of these crossings and sex ratio were evaluated. Hatching success of the eggs, fertilized by the supermale was significantly lower than that by the normal male. Over 95-99 % progenies sired by crossing supermales with normal females were males, while 52-55 % progenies alone were males with the cross of normal males and normal females. Hatching success and survival of alevins were significantly higher for the progenies of the crosses between superfemales and sex reversed males than those resulting from the crosses between superfemales and normal males. However, there was no significant difference in the sex ratio among the progenies of these crosses. Therefore, crossings of superfemales with sex reversed males provide the highest percentage of survival and male progenies.

• Proceedings of the Turfgrass Society of Korea Conference
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• 2005.04a
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• pp.31-38
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• 2005

본 실험은 한국잔디 신품종 '세녹'(특허출원:10-2003-0072018) 개발에 관한 것이다. 한국에서 수집한 유전자원 중 갯잔디와 금잔디간에 인공교배를 수행해서 F1계통을 얻었다. 작성한 F1계통을 포장상태에서 방임수분을 통해 변이확대를 하였으며, 이들 방임수분 후대에서 선발한 것이 '세녹'이다. '세녹'은 유전적으로 잔디의 녹색도가 진하며, 낮게 자라는 특성이 있고 품질이 우수하며 잎의 강직성이 높다. 엽폭이 3.1mm로 중엽형이며, 초장이 14cm로 낮고, 잎각도가 67.3도로 넓다. 지면으로부터 최하위 엽의 잎 몸 기부까지의 길이가 2cm로 낮은 형태적 특성을 갖고 있어 낮은 잔디깍기에 적응할 수 있는 영양번식형 잔디이다. 또한 RAPD 밴드 특성에서 한국잔디 신품종 세녹(Senock)이 특이 밴드를 갖고있어 식별성이 높다.

• The Korean Journal of Zoology
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• v.30 no.4
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• pp.417-431
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• 1987

Isozyme analysis, morphometric comparison, and artificial hybridization test wereperformed to elucidate the patterns of genic variation, morphological differentiation, genetic incompatibility, and a probable path in speciation between two MDH allelotypes (MM type and MS type) of the Dark Chub Zacco temmincki, a fresh water fish inhabiting in Korean waters. The degree of genic variation of MS type(HD=.023, HG=.021) was twofold higher than that of MM type (HD=.013, HG=.014) but both allelotypes were far less than the average genic variation of fresh water Bish in general. The average genetic similarities among 7 populations of MM type and 6 Populations of MS type were S=.947 and S=.966 respectively, whereas the value between two allelotypes was S=.853. Presumed divergent time of two allelotypes was estimated to be about 700 thousand years ago. Discriminant function analysis based on 18 morphometric characters of 302 specimens representing 12 populations revealed no morphological difference between two allelotypes. Artificial hybridization test indicates that there is an obvious genetic incogpatibility between two allelotypes and therefore it is assumed that isolating mechanism is completed.

• Horticultural Science & Technology
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• v.29 no.6
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• pp.641-644
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• 2011

A new standard red color gerbera (Gerbera hybrida Hort.) 'Red Auction' was developed from a cross of '01-120-195' and 'Misty red' followed by seedling and line selections at the Flower Research Institute, Gyeongsangnam-do Agricultural Research & Extension Services (ARES) in 2008. Characteristics trials were conducted three times from 2006 to 2008. 'Red Auction' has semi-double type in good harmony with red color (RHS 45-A) ray floret and a good stable flower shape and strong peduncle. Its vase life was 11.3 days. The average yield of 'Red Auction' was 48.8 flowers per plant a year in greenhouse yield trials carried out from 2006 to 2008. This cultivar registered for commercialization in 2010.

• Horticultural Science & Technology
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• v.30 no.4
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• pp.471-475
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• 2012

A new pot chrysanthemum cultivar 'Peace Angel' was bred by cross pollination between 'Peace Yellow' and 'Lompoc' at the Yesan Chrysanthemum Experiment Station. The cross was made in 2003 and 'Peace Angel' was finally selected in 2007 after investigating its characteristics from 2005 to 2007. It flowers in the middle of October under natural conditions in Korea climate, but year-round production is also possible by short day treatment in summer or lighting treatment in winter. Flower shape is anemone type with pink petals and a yellow green center. Flower diameter is about 5.6 cm and the number of flowers per stem is 23.0, respectively. When short day treatment is necessary for manipulation of flower formation, 7 weeks of short day treatment is enough for the production. The shelf life is 22.4 days in the autumn season.

• Korean Journal of Plant Resources
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• v.19 no.5
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• pp.612-616
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• 2006

In recent years, there has been increasing concerns in gene flow from GM crops to wild or weedy relatives as a potential risk in the commercialization of GM crops. To access the possibility of the environmental impacts by GM rice, small-scale experiments of gene transfer were carried out. Herbicide and drought stress resistant GM rice and non-GM rice Nakdongbyeo, wild rice Oryza nivara, and weedy rice Sharebyeo were used for artificial pollination experiments and bar gene was used as a tractable marker after pollination. The harvested putative hybrid seeds after artificial pollination were germinated and true hybrid plants were selected by basta treatment. The hybrid plants were verified again by PCR amplification of bar and trehalose-6-phosphate phosphatase (TPP) genes and RAPD PCR analysis.

• Horticultural Science & Technology
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• v.33 no.1
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• pp.143-148
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• 2015

A new Dianthus cultivar 'URI 2010-6' was selected among F1 progenies from a cross between interspecific hybrid 'Evergreen Emerald' as the seed parent and D. chinensis ' Ruby' as the pollen parent. In 2007, the cross w as made, and the seedlings of $F_1$ progenies were obtained and investigated. After three rounds of characteristic evaluation from 2008 to 2010, a clone was selected and registered as 'URI 2010-6' at the Korea Seed and Variety Service (plant variety protection number: 4431) in 2011. The flower of 'URI 2010-6' is caryophyllaceous, single type, and mainly bright red (Red, N79C) with secondary white (White, N155C) on the edge or as spots on the petal. The flower has diameter of 2.7 cm and length of 0.8 cm. This cultivar blooms continuously about 150 d on average and may be used as evergreen plant during winter months.

• Horticultural Science & Technology
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• v.29 no.1
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• pp.77-80
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• 2011

A new bi-color mini gerbera (Gerbera hybrida Hort.) 'Sun Cap' was developed from a cross of '99-ga-2' and '99-na-3-1' followed by seedling and line selections at the Flower Research Institute, Gyeongnam Agricultural Research and Extension Services (ARES) in 2007. Characteristic tests were conducted three times from 2004 to 2007. 'Sun Cap' has single type in good harmony with bi-color (Red/Yellow, RHS 45-B/9-A) ray floret and green center. It has good stable flower shape and strong peduncle. Its vase life was 13.5 days. The average yield of 'Sun Cap' was 102.6 flowers per plant a year in greenhouse. Yield trials were carried out from 2004 to 2007. This cultivar was registered for commercialization in 2009. 'Sun Cap' would be cultured under greenhouse condition in Korea.

• FLOWER RESEARCH JOURNAL
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• v.17 no.3
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• pp.194-196
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• 2009

A new standard carnation Dianthus caryophyllus 'Pink Beryl' was bred from a cross of red standard cultivar 'Francesco' and purple standard cultivar 'Saturn' in 1996 at the National Institute of Horticultural & Herbal Science. After investigation of the characteristics for 4 years from 1997 to 2000 and registered to the official breeding variety of Rural Development Administration in 2000. 'Pink Beryl' is pink standard cultivar with round edge of petal for cut flower. It has medium resistance to Fusarium wilt. To avoid calyx splitting caused by high temperature, this cultivar is recommended to grow over $8^{\circ}C$ at night and under $25^{\circ}C$ at days during flower bud differentiation period.

• FLOWER RESEARCH JOURNAL
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• v.17 no.4
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• pp.332-335
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• 2009

A new cultivar of Rosa hybrida 'Loving Heart' was developed by crossing Gyeongkyo R-6 and 'Noblesse' at Gumi Floricultural Experiment Station in 2002. Characteristics trials were conducted three times from 2004 to 2007. This cultivar showed dark pink flower color (RHS, Red-purple group 66-B) and standard type with good flower shape. The flower diameter is 10.3cm and the number of petals per flower is 55. Vase life of 'Loving Heart' could be as long as 12.3days. The yield of 'Loving Heart' was $127stems/m^2/year$. 'Loving Heart' has good quality of cut flower and strong vigor in plant growth. This cultivar has straight stems and is easy to culture because of a few prickles on the top of stem. This cultivar is appropriate for both soil and solution(hydroponics) cultures.