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Influence of short day treatment on autumn fruit production of June-bearing strawberry cultivars

  • Jiwei Ruan
  • Young Hun Lee
  • Young Rog YeoungEmail author
  • Kirk D. Larson
Research Report

Abstract

Short-day (SD) strawberry cultivars were grown in 2008 and 2009 fall each year to evaluate effects of short-day (SD) treatment on flowering and fall fruit production in the high elevation of South Korea. In 2008, daughter plants of six cultivars ‘Maehyang’, ‘Seolhyang’, ‘Keumhyang’ (Korean short-day cultivars), ‘Akihime’, ‘Red pearl’, and ‘Sachinoka’ (Japanese short-day cultivars) were exposed to short-day (10-h photoperiods) conditions at the high elevation (HE, 800 m elevation) for 35 days beginning in late June. On 31 July, plants were removed from the SD environment and established in a substrate system at the highland. In 2009, the ‘Akihime’ and ‘Seolhyang’ were examined again. In 2008, flower bud initiation rate was above 90.0% for all cultivars except for ‘Akihime’ (83.3%). Fruit harvest commenced 1st of October 2008 and average fruit weight was consistently > 20g except for ‘Sachinoka’ (18 g). By mid-November, plants of ‘Seolhyang’ and ‘Akihime’ produced 222–260 more grams of fruit compared to other cultivars, with ‘Seolhyang’ having the earliest production. In 2009 experiment, flower bud initiation rates of ‘Akihime’ and ‘Seolhyang’ plants were 85.4% and 82.4%. Due to the earlier planting in 2009, fruit harvest commenced on 8 September (one month earlier than in 2008) and extended over 10 weeks. Yield and fruit numbers of ‘Akihime’ and ‘Seolhyang’ were 397.7 g, 22.7 and 331.7 g, 19.8, respectively. Results of this study indicate that exposure to SD photoperiods and relatively cool temperatures at HE can increase autumn fruit production in SD strawberry cultivars ‘Akihime’ and ‘Seolhyang’.

Additional key words

autumn fruit production flower induction Fragaria high elevation short-day treatment 

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Copyright information

© Korean Society for Horticultural Science 2011

Authors and Affiliations

  • Jiwei Ruan
    • 1
  • Young Hun Lee
    • 2
  • Young Rog Yeoung
    • 2
    Email author
  • Kirk D. Larson
    • 3
  1. 1.Research Institute of Tropical Eco-agricultural SciencesYunnan Academy of Agricultural SciencesYuanmou, YunnanChina
  2. 2.Department of Plant SciencesGangneung-Wonju National UniversityGangneungKorea
  3. 3.South Coast R.E.CUniversity of California-DavisIrvineUSA

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