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Jiwei Ruan,용영록,Chunmei Yang,Guoxian Wang,Lifang Wu,Shenchong Li,Pang Tao,Chengfei Liao,Ji-Hua Wang 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.6
Studies on the inheritance of day-neutrality, a highly desirable trait in strawberry (Fragaria×ananassa),have not been conclusive because flowering phenotypes were evaluated based on different materials and experimentalsites. In the present study, selfed and crossed progenies of Day-neutral (DN) ‘Albion’ and June-bearing (JB) ‘Akihime’cultivars, namely ‘Albion’ × ‘Albion’, ‘Akihime’ × ‘Akihime’, and ‘Akihime’ × ‘Albion’, were established in 2013and 2014. The flowering phenotype (DN or JB) of seedlings from each of the three progenies, as well as of parentalplants, was evaluated for two successive years (2015 and 2016) in Central Yunnan, China, and their segregationratios were used to elucidate day-neutrality inheritance. Single dominant gene inheritance was demonstrated forday-neutrality, although minor genes (from the JB parent ‘Akihime’) likely increase DN magnitude. During thejuvenile stage (i.e., long before the first inflorescence), the major gene controlling day-neutrality may not beexpressed. We provide basic information for DN gene mapping and cloning, as well as materials (progenies) fordomestic DN strawberry breeding.
Jiwei Ruan,용영록,Kirk D. Larson 한국원예학회 2011 Horticulture, Environment, and Biotechnology Vol.52 No.6
This study was conducted to evaluate the yield performance for University of California (UC) cultivars ‘Albion’ and ‘San Andreas’ during summer and fall fruiting season in the northeastern highlands of Korea at 750 meters elevation. We investigated the effects of cultivar, planting date and planting material on fruit productivity in a bench-top peat substrate system. For both cultivars, we compared the yield performance of frozen (-2.2℃) bare-root plants (FBR), potted frozen bare-root plants (PFBR), and potted fresh plants (PF) on four dates: 30 Apr., 15 May, 30 May, and 15 Jun., 2010. Fruit harvest commenced in early June and terminated on 2 Dec. For each cultivar and type of planting material, fruit were harvested twice a week and fruit weight and numbers of marketable and non-marketable fruits were determined for each harvest. Both cultivars performed well in summer and autumn production in high land, although marketable fruit yield for ‘San Andreas’ was significantly greater than that of ‘Albion’. Plants planted on 30 Apr. produced the earliest fruit and the greatest marketable yields, 521.0 and 487.0 g/plant, 24.1 and 23.3 ton/hectare for ‘Albion’ PFBR and FBR plants, respectively, and 618.3 and 529.6 g/plant, 28.6 and 24.5 ton/hectare for ‘San Andreas’ PFBR and FBR plants, respectively. Generally, PFBR had higher marketable fruit yield than FBR and PF had the lowest. PFBR is recommended especially for late planting and FBR is acceptable for early planting, while PF is not suitable for this production system. The relationship of fruit productivity and vegetative growth was significantly correlated.
Jiwei Ruan,이영훈,홍세진,용영록 한국원예학회 2013 Horticulture, Environment, and Biotechnology Vol.54 No.3
This study was conducted to evaluate the contents of sugars and organic acids in the fruits of day-neutral (DN) and ever-bearing (EB) cultivars grown in high-elevation in Korea. Six DN and five EB cultivars were established in bench-top substrate culture system in high tunnel. Plug transplants were planted on 5 May, 2011 and complete nutrition was supplied during the whole experimentation. Fruit harvest started in early June, and lasted until middle of November. The fruits of DN cultivars showed higher organic acid contents but lower sugar contents and total soluble solids than those of EB cultivars. ‘Albion’ showed the highest contents of total soluble solids and sugars, and sugars/acids ratio among DN cultivars. Among EB cultivars, ‘Goha’ possessed mediate contents of sugars, organic acids and total soluble solid without any extreme weakness in qualities. ‘Charlotte’ showed the highest contents of sugars and total soluble solid, and sugar/acid ratio, and the lowest contents of organic acids; the unique character of ‘Flamenco’ was its lowest contents of organic acids among EB cultivars. Fruit total soluble solid contents, sugars,organic acids, and sugar/acid ratio all significantly varied with the progressive seasons and an interactive effects between cultivars and harvest time on above fruit quality parameters were found. Integrated cultural strategy based on contents of sugars and organic acids was discussed according to fresh consumption and process purposes.
Jiwei Ruan,이영훈,용영록 한국원예학회 2013 Horticulture, Environment, and Biotechnology Vol.54 No.2
This study was conducted to evaluate the flowering and fruiting of day-neutral (DN) and ever-bearing (EB)cultivars in high-elevation in Korea. Six DN and five EB cultivars were established in bench-top substrate culture system in high tunnel. Plug transplants were planted on 5 May, 2011 and complete nutrition was supplied during the whole experimentation. Fruit harvest started in early June, and lasted until middle November. Fruit yield was significantly different among DN and EB, and individual cultivars. Generally, summer flower came out earlier and resulted in more summer yield for EB cultivars than for the DN cultivars. However, DN cultivars produced higher autumn yield than EB cultivars. Fruits of DN cultivars showed harder firmness, bigger size, less malformed fruits, deeper surface colors than those of EB cultivars. Fruit surface colors significantly varied with the progressive seasons and an interactive effect between cultivars and harvest time on fruit surface colors was found. Among DN cultivars, ‘San Andreas’ not only showed some typical DN characters such as big fruit and hard firmness, but also showed high values of color parameters. Among EB cultivars, ‘Charlotte’ and ‘Goha’ combination can realize even fruit supply in summer and autumn. Combination of DN cultivar and EN cultivar not only can realize even fruit supply but also can fulfill both fresh consumption and processing purposes in summer and autumn season.