In this study, we investigated the effects of different training methods (TM) on growth, yield and fruit quality of ‘Ruby Star’ passion fruit under plastic house cultivation. In the TM-upward, the bearing shoot was extended upward, and in the TM-downward, it was extended downward. The average daily air temperature ranged from 15 to 23 ℃ during the flowering period and 20 to 28 ℃ thereafter. The illuminance between rows was lower in the TM-upward than in the TM-downward. The vegetative growth was vigorous in the TM-upward, such as the internode length and individual leaf area being larger than those in the TM-downward. The incidence of flower with upright style was lower and the fruit set percentage was higher in the TM-upward than in the TM-downward. The fruit yield was 1.5 times higher in the TM-upward than in the TM-downward. In the TM-upward, the percentage of fruits with good coloring was lower and the sugar content was lower than in the TM-downward. In conclusion, it was clarified that the TM-upward promotes the vegetative growth and the crop yield, whereas the less-sweet fruit might be resulted by low light intensity, suggesting better light irradiance should be altered in the future.

The objective of this study is to provide basic information for growers to select cultivars when introducing cultivars other than ‘Irwin’. In this study, we compared the days from full bloom to peak of harvest, cumulative temperature, days from harvest to ripening, and fruit quality of 9 cultivars in heated plastic house cultivation. The following cultivars were used: ‘Amakinboshi’, ‘Ataulfo’, ‘Bailey’s Marvel’, ‘Carrie’, ‘Golden Nugget’, ‘Irwin’, ‘Jubilee’, ‘Mallika’ and ‘Tahar’. The days from full bloom to peak of harvest were shorter in ‘Tahar’ (109 days) and longer in ‘Bailey’s Marvel’ (142 days) than in ‘Irwin’ (117 days). The cumulative temperature were smaller in ‘Tahar’ (1,851℃･day) and larger in ‘Bailey’s Marvel’ (2,496℃･day) than in ‘Irwin’ (2,000℃･day). ‘Ataulfo’ and ‘Bailey’s Marvel’ took longer than ‘Irwin’ (6.6 days) to ripen for more than 8 days, suggesting that these cultivars have excellent transportability. The hue angle of fruit skin tended to be smaller in ‘Jubilee’ than in ‘Irwin’, and the red color was more vivid. Fruit weight was larger in ‘Jubilee’ and smaller in ‘Ataulfo’ and ‘Carrie’ than in ‘Irwin’. Sugar content was higher in ‘Ataulfo’, ‘Bailey’s Marvel’ and ‘Golden Nugget’ than in ‘Irwin’. Titratable acidity tended to be higher in ‘Amakinboshi’, ‘Ataulfo’, ‘Bailey’s Marvel’, ‘Golden Nugget’ and ‘Mallika’ than in ‘Irwin’. In this study, ‘Ataulfo’ and ‘Bailey’s Marvel’ had excellent transportability, ‘Jubilee’ had excellent red skin, and ‘Ataulfo’, ‘Bailey’s Marvel’ and ‘Golden Nugget’ had high sugar content. These cultivars were considered to be promising cultivars for mango production and distribution in Japan.