Japan International Research Center for Agricultural Sciences | JIRCAS

‘Sunny Shine’: A new passion fruit cultivar with low acidity and good appearance

Description

In Japan, passion fruit (Passiflora edulis) ranks third in production among tropical fruits after pineapple and mango. It is produced mainly in the southern areas and consumed as fresh fruits, juice, and for processing. Some of the problems with fresh fruit consumption are immature fruit drop during periods of high temperature (above 30oC) and high acidity after harvest. All conventional cultivars that were examined had the same problem.

To cope with these problems, JIRCAS developed the new passion fruit cultivar ‘Sunny Shine,’ which produces fruits that have lower acidity and good appearance. It was selected from seedlings obtained from a cross between JTPF-009 and ‘Summer Queen.’ JTPF-009 is a variety with a non-abscising fruit while ‘Summer Queen’ is a major passion fruit cultivar in Japan. The fruit quality and cultural performance were evaluated until 2015. In 2016, the new cultivar was named ‘Sunny Shine’ and an application for registration was filed (application number: 30972) in accordance with The Plant Variety Protection and Seed Act of Japan.

The average fruit weight of ‘Sunny Shine’ is about 110g (Table 1). The fruit color is red-purple with a smooth and glossy skin (Fig. 1). The matured fruit juice brix is about 18. The acidity of matured fruit juice during high temperature season is 1.5 to 2.0%, which is much lower than that of ‘Summer Queen’ (>2.0%), though there is no difference in juice acidity during low temperature season. ‘Sunny Shine’ has less immature fruit drop than ‘Summer Queen’ during high temperature season resulting in good coloring of the skin (Fig. 3). Days from flowering to fruit drop is longer in ‘Sunny Shine’ than ‘Summer Queen’ (Table 1) probably because it partly inherited the non-abscising characteristic of JTPF-009, resulting in lower acidity and less immature fruit drop. However, the cultural performance of ‘Sunny Shine’ is quite different depending on soil condition. The types of suitable soil and appropriate cultural management for growing ‘Sunny Shine’ are is under examination.

‘Sunny Shine’ is suitable for fresh fruit consumption because of its relatively large fruit size, good aroma, high brix, lower acidity during high temperature season, and glossy appearance.  The development of this new cultivar with desirable traits will enhance production and consumption of passion fruit in Japan.

Figure, table

  1. Table 1. Characteristics of ‘Sunny Shine’ and ‘Summer Queen’ (2013-2015)

    Month
    Cultivar
    Days from flowering to harvest

    Yield
    (kg/tree)

    Fruit weight
    (g)
    Pulp & seed
    (%)
    Brix
    Acidity
    (%)
    Sugar-acid ratio
    5
    Sunny Shine
    62
    0.27
    131
    43.1
    17.3
    3.4
    5.2
    Summer Queen
    64
    1.38
    117
    46.6
    18.0
    2.9
    6.7
    6
    Sunny Shine
    65
    2.00
    113
    48.3a
    18.2
    2.2a
    8.7a
    Summer Queen
    62
    2.62
    110
    46.8b
    18.4
    2.8b
    6.8b
    7
    Sunny Shine
    76a
    2.04a
    109a
    55.1a
    16.9a
    1.5a
    11.8a
    Summer Queen
    55b
    1.11b
    98b
    46.8b
    17.9b
    2.3b
     8.1b
    8
    Sunny Shine
    98
    0.38
    110
    54.4
    15.5
    1.5
    10.8
    Summer Queen
    -
    -
    -
    -
    -
    -
    -
    a,b: Different letters indicate statistically significant differences (p<0.05)
     
     
     
     
  2. Fig. 1. Mature fruits of ‘Sunny Shine’ (top) and ‘Summer Queen’ (bottom)
    Fig. 1. Mature fruits of ‘Sunny Shine’ (top) and ‘Summer Queen’ (bottom)
  3. Fig. 2. Fruit cross sections of ‘Sunny Shine’ (left) and ‘Summer Queen’ (right)
    Fig. 2. Fruit cross sections of ‘Sunny Shine’ (left) and ‘Summer Queen’ (right)
  4. Fig. 3. Mature fruit color of ‘Sunny Shine’ (top) and ‘Summer Queen’ (bottom) during high temperature period
    Fig. 3. Mature fruit color of ‘Sunny Shine’ (top) and ‘Summer Queen’ (bottom) during high temperature period
Affiliation

Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences

Program name

Information Analysis

Term of research

FY2016(FY2007~FY2015)

Responsible researcher
  • Ogata Tatsushi (Tropical Agriculture Research Front)
  • Yamanaka Shinsuke (Tropical Agriculture Research Front)
  • Takagi Yoko (Tropical Agriculture Research Front)
  • Kozai Naoko (Institute of Fruit Tree and Tea Science, NARO)
  • Yonemoto Yoshimi (Yonetropics)
  • Publication, etc.

    Ogata, et al, ‘Sunny Shine’ Variety registration application no. 30972 (Jun. 28, 2016)

    Japanese PDF
  • PDF icon Download 2016_D02_A4_ja.pdf (418.55 KB)
  • PDF icon Download 2016_D02_A3_ja.pdf (286.75 KB)
  • English PDF
  • PDF icon Download 2016_D02_A4_en.pdf (541.93 KB)
  • PDF icon Download 2016_D02_A3_en.pdf (525.38 KB)
  • Poster PDF
  • PDF icon Download 2016_D02_poster.pdf (330.07 KB)