Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Development of a New Coreopsis Variety 'Uridream Pink' by Gamma-ray Irradiation

감마선 조사에 의한 코레옵시스 신품종 'Uridream Pink' 육성

  • Received : 2014.04.29
  • Accepted : 2014.08.06
  • Published : 2014.12.31
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Abstract

A new coreopsis cultivar, 'Uridream Pink', was developed by mutation breeding using gamma-ray irradiation. Rooted cuttings of 'Uridream 01', developed at Uriseed Company, were exposed to various gray ranges of gamma-rays from a $^{60}CO$ source for 24 h in 2009 at the Korea Atomic Energy Research Institute. Using gamma-rays with the range of 10-100 Gy, a chimeric mutant with pastel pink flowers was induced at 30 Gy from 'Uridream 01', which blooms red-purple flowers (Red-purple group, 59A). Clones that produced flowers with modified pink color were separated from the chimeric mutant and fixed by more than three rounds of cutting back from 2009 to 2010. The separated mutant clones with modified pink color were found to bloom flowers with marketable color and be free of any abnormal plant characteristics. The typical color of the flowers was pastel pink (Red-purple group, 67B), and the clones were registered as 'Uridream Pink' at the Korea Seed and Variety Service (plant variety protection number: 4410). Although the size of flowers and leaves of 'Uridream Pink' are smaller than those of 'Uridream 01', the number of flowers per plant is greater. 'Uridream Pink' can be used as both a pot and a garden plant because of its long blooming period from late spring to late autumn.

'Uridream Pink'는 감마선 조사에 의해 의해 발생된 돌연변이에 의해 육성된 금계국속 신품종이다. 우리꽃 종묘에서 자체 육성한 품종인 'Uridream 01'의 발근된 삽수를 대상으로, 2009년 한국원자력연구원에서 다양한 선량의 $^{60}CO$ 감마선을 24시간동안 처리하였다. 10-100Gy 처리 중 30Gy에서 발생된 돌연변이체의 화색은 파스텔 분홍색으로 주로 적자색을 띄는 'Uridream 01'(Red-purple group, 59A)과 차이가 있었다. 2009년부터 2010년까지 변형된 분홍 화색의 변이체를 분리, 삽목을 통해 3회 이상 진행, 고정하였다. 분리 육성된 변형된 분홍 화색의 변이체는 기존의 품종에 비해 상품성 있는 색상을 띄며, 이형주의 발생이 없는 것으로 평가되었다. 꽃의 주된 색은 파스텔 분홍(Red-purple group, 67B)을 띄기에 'Uridream Pink'로 명명하고 국립종자원에 신품종 등록되었다(품종보호: 제4410호). 본 신품종은 화기 및 잎 등이 'Uridream 01'보다는 작지만 다화성이다. 또한 개화기간이 늦은 봄에서 늦가을까지 길어 분화 재배뿐만 아니라 노지 재배도 가능하다.

Keywords

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