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일계성 딸기의 고온기 저온단일 처리가 화아형성 및 세대 촉진에 미치는 영향
노일래(Il Rae Rho),조용섭(Yong Seop Cho),정재완(Jae Wan Cheong),정호정(Ho Jeong Jeong),정해붕(Hae Boong Jeong) 한국원예학회 2007 원예과학기술지 Vol.25 No.1
Floral induction in strawberry is generally influenced by thermo-photoperiod and several agronomic and nutritional factors. This study was conducted to find out the environmental and plant physiological conditions for inducing the flower bud formation during the hot and long-day season. The progeny from a varietal cross of ‘Johong’ × ‘Sachinoka’ and three selfed generations from ‘Johong’, ‘Sachinoka’ and ‘Elan’ varieties were treated for 9 weeks with low temperature of 5℃ and short day-length of 8 hours during the su㎜er. The flower bud formation rate of the progeny selfed from an ever-bearing variety, ‘Elan’ was 100%, whereas that of the progeny crossed from ‘Johong’ × ‘Sachinoka’ and that of the progeny selfed from ‘Johong’ and ‘Sachinoka’ showed 58.7%, 22.6%, and 54.4%, respectively. As a result, it proved that low temperature and short photoperiod is essential for flower induction but high temperature and long day condition is also necessary for flower development in strawberry. Crown diameter of seedling to react on low temperature and short day treatments must to be at least 9-10 ㎜, and it need about 80 days from sowing.