본 연구는 생산자와 시장의 기호성이 우수한 스프레이 장미 품종 ‘Haesal’의 유용한 화색변이 품종을 단기간에 육성하기 위해 삽수와 발근삽목묘에 각각 감마선을 처리한 후 변이 발생 양상과 주요 화색변이의 생육특성을 조사하기 위해 실시하였다. 감마선 처리 시료 형태에 상관없이 선량이 높아질수록 식물체 치사율은 높아졌고 신초의 발생량과 신초 생장량이 감소하였다. 50% 치사선량(LD50, Lethal dose 50)은 삽수는 70Gy부터, 발근삽목묘는 90Gy부터였고 변이 발생률은 삽수와 발근삽목묘에서 각각 2.6%, 3.1% 였으며, 변이형태는 양쪽 모두 완전변이체, 키메라, 그리고 꽃 형태변이였다. 감마선을 처리한 삽수로부터 ‘Haesal’과 거의 유사한 특성을 가진 화색변이 MUL-1과 MUL-2를 각각 70Gy와 50Gy 선량에서 유기하였고 특성을 조사한 결과 꽃 직경과 꽃잎수, 절화수량은 ‘Haesal’에 비해 조금 적었지만 화형과 잎의 특성, 절화장 등은 ‘Haesal’과 차이가 없었다.

A new cultivars Dendranthema grandiflourm ‘Dream River’ was developed at Gyeonggi-do Agricultural Research ＆ Extension Services(GARES),Korea in 2010. The cultivar ‘Dream River’ was crossed in 2007 between ‘Geumsu’, a spray cultivar with yellow single type, and ‘Crangball’, a spray cultivar with pink single type. Trials were conducted from 2008 to 2011 for evaluations and selection of this variety, including a shading culture in summer and a retarding culture in autumn. The natural flowering time of ‘Dream River’ was late October, and year-round flowering is possible by shading or lighting treatment. After the test of specific characters from 2009 to 2011, it was finally selected and named. The cultivar has an single type flowers with ivory petals and a green flower center. The diameter of flower is 56.0mm. Numbers of flowrs per stem and petals per flower are 15.2 and 26.5, respectively. Days to flowering under the short day treatment is about 53 days in the four season. The cultivar ‘Dream River’ has ivory petal with 7.5weeks to flowering under the short day treatment.

충남농업기술원 예산국화시험장에서 스프레이국화 신품종 육성을 위하여 '투톤'을 모본으로 자연방임수분을 실시하여 '예스모닝'을 육성하였다. 이 품종의 주년재배 특성검정을 2003부터 2005년까지 3년 동안 조사하였다. '예스모닝'의 자연개화기는 10월 하순경이고 촉성 및 억제재배가 가능하다. '예스모닝'은 홑꽃이며 꽃잎은 꽃잎의 가장자리는 백색이고 안쪽은 자주색의 복색이며 화심은 진한 녹색이다. 꽃 직경은 4.4 cm이고 화심 폭은 1.3 cm이다. 착화

A new spray chrysanthemum cultivar, 'Innocence' was released by National Horticultural Research Institute (NHRI), Rural Development Administration (RDA), in 2005. It was selected from the progenies of open pollination of 'Sei-Alps' in 2002. After evaluation for the characteristics including shading culture in summer and retarding culture in spring between 2002 and 2005, final selection was made. The natural flowering time of "Innocence" is late October, but year-round flowering is possible by shading and illumination. It has round and wide petal, single type flowers with pure white petals and yellowish green flower center. The flowers are large and volumed. The plant shows vigorous growth. The diameter of flower is 7.4 cm. The number of flowers per stem is 9.3 and number of petals per flower is 27.7. The days to flower under short day treatment is about 57 and its vase life is 19 days in autumn season.