Table 9.Characteristics of recently introduced apple varieties in Japan (from report of
Kanreitikajyu meeting, 1996).

Fruit
harvest
date

Titratable
acidityz
(%)

Weightz
(g)

Brixz
(%)

Firmnessz
(lb)

Variety

Colorz

Pedigree and origin

Hozuri
Akita-Gold
Gunmameigetsu
Aori-9
Aori-13
Kitaro

Oct.25
Oct.15
Nov. 7
Sep. 30
Oct.7
Oct.14

351
272
278
298
361
250

15.1
13.5
13.6
13.8
14.5
15.4

0.70
0.50
0.21
0.48
0.34
0.42

13.2
16.3
12.4
15.8
17.7
15.1

Red stripe
Yellow
Yellow
Red stripe
Red blush
Yellow

Seedling of Fuji. Fukushima
G. Delicious x Fuji. Akita Pref.
Akagi x Fuji. Gunma Pref.
Akane x Orin. AomoriPref.
Sekaiichix Akane. Aomori Pref.
Fujix Hatsuaki. Morioka

zFruit quality data measured at each prefectural research station are shown.

Table 10.Comparison of notable red sports of Fuji in Nagano, Japan (Nagano Fruit Tree
Experiment Station).

Av. fruit
weight
(g)

Titratable
acidity
(%)

Red
sport

Colory
(%)

Color
indexx

Brix
(%)

Rootstock

Type of coloring

Akifu-47
Seirin-spur
Nagafu-12
Nagafu-6
Nagafu-2

M.26/Maruba.z
Maruba.
CG.10/Maruba.
M.26/Maruba.
Maruba.

334
362
362
417
361

100
82
99
94
91

5.3
4.2
5.8
5.5
3.8

15.3
16.1
15.5
15.4
15.1

0.40
0.30
0.37
0.40
0.44

Stripe, colorswell
Intermediate to blush
Intermediate
Stripe
Stripe to intermediate

zMarubakaido (selected clone ofM. prunifoliaBork.var. ringo) rootstock.
y% of red color per fruit surface.
xColoring index (6, excellent; l, poor).

Table 11.Characteristics of recently found promising red sports of Fuji in Japan with a strong
coloring characteristic.

Type of
coloring

Sport

Origin

Notes

Nagafu-12
Mishimaz
JA-Azumi
Kamijo
Miyazakai
Gozu
Nakata
Sheki
Hirosaki-fujiy
Koriny

Intermediate
Stripe
Stripe
Intermediate
Stripe
Stripe
Intermediate
Stripe

Selected clone
Selected in AkitaPref.
Selected from Nagafu-2
Selected from Nagafu-6
Selected from Nagafu-2
Selected from Nagafu-2
Selected clone
Selected clone
Selected in Aomori Pref.
Selected in Yamagata Pref.

Recommended inNaganoPref.
Grown in some areas inNagano Pref.
Grown in Azumi, Nagano Pref.
Grown in Matsumoto,Nagano Pref.
Grown in Shinonoi,Nagano Pref.
Grown in Oomachi, Nagano Pref.
Grown in Azusagawa,Nagano Pref.
Grown in Nagano, Nagano Pref.
Start planting in Aomori Pref.
Start planting in some Pref.

zOriginated from Akifu-47 including Rakuraku Fuji and 2001 Fuji.
yEarly maturing strain of Fuji.

Table 12.Comparison of 9-year-old Fuji apple trees on M.9 NAGANO and M.26 rootstocks.

Tree
height
(cm)

Trunk cross-
sectional area
(TCA, cm2)

Cumulative
yield/tree
(kg)

Cumulative
yield/TCA
(kg/cm2)

Av. fruit
weight
(g)

Rootstock

M.9 NAGANOz
M.26y
Significancex

347
416
*

33
63
**

155
168
NS

4.71
2.67
**

335
416
NS

zM.9-, a clone selected in Nagano Fruit Tree Exp. Station, was named M.9 NAGANO in 1997.
yFuji trees/M.9 NAGANO (40 cm) and M.26 (40 cm) planted as rootstock half-buried.
xNS, not significantly different; *different at 5%, **different at 1% level.

Table 13.Comparison of 20-year-old Fuji apple trees on some interstocks and rootstocks.

Tree
height
(cm)

Tree
spread
(cm)

Cumulative
yield/tree
(kg)

Cumulative
yield/TCA
(kg/cm2)

Rootstock and
interstock

TCA
(cm2)

M.9 NAGANOz
M. 26y
M.26/Maruba.-Dx
M.26/Maruba.-Sw

388 ± 10
516 ± 16
487 ± 13
277 ± 11

332 ± 7
451 ± 40
424 ± 19
183 ± 18

98.8 ± 5
167.6 ± 21
180.9 ± 9
58.2 ± 10

604.9
-
599.1
280.2

6.12
-
3.31
4.82

zTrees/M.9 NAGANO (40 cm) planted as rootstock half-buried.
yTrees/M.26 (40 cm) planted as rootstock half-buried.
xTrees/M.26 (30 cm)/Marubakaido planted as interstem half-buried.
wTrees/M.26 (30 cm)/Marubakaido planted as interstem exposed above ground.

Table 14.Correlation coefficient and regression equations of % of area occupied by hedge
occupied area (HOA) and yield and fruit quality of Fuji apple trees on dwarfing rootstocks.

Variable
X

Regression
equation

Correlation
coefficientv

Estimated Y valuefor Xvalues of_____
505560657075%

Y

HOAz
HOA
HOA

Yield (kg)y
% PCF (%)x
Brix (%)w

Y= -3.24 + 0.53X
Y= -10.27 + 0.59X
Y= 18.7- 0.04X

0.707**
0.630**
0.719**

23.3
19.2
16.7

25.9
22.2
16.5

28.6
25.1
16.3

31.2
28.1
16.1

33.9
31.0
15.9

36.5
33.9
15.7

zHOA: % of hedge occupied area in the 4 x 1.5 m spacing.
yYield/tree planted at 4 x 1.5 m spacing hedge row.
x% of poor colored fruit which colored less than 30% of surface.
wAverage brix of fruit.
vThe correlation is stronger as the coefficient increases from .1 to .9; **Significant at 1% level.

Table 15.Correlation coefficient and regression equations of leaf area index (LAI) and yield,
fruit quality of Fuji apple trees on dwarf rootstocks.

Variable
X

Regression
equation

Correlation
coefficientw

Estimated Y valuefor Xvalues of
1.82.02.22.42.6

Y

LAIz
LAI
LAI

Yield (kg)
% PCF (%)y
Brix (%)x

Y= 2.9 + 20.8X-2.7X2
Y= 4.9 + 11.1X
Y= 17.5- 0.67X

0.76**
0.82**
-0.81**

31.6
24.9
16.3

33.7
27.1
16.2

35.6
29.3
16.0

37.3
31.5
15.9

38.7
33.7
15.8

zLeaf area index calculated in a 4 x 1.5 m spacing hedge row.
y% of poor colored fruit which colored less than 30% of surface.
xAverage brix of fruit.
w**Significant at 1% level.

Table 16.Correlation coefficient and regression equations of average shoot length (ASL) and
yield, fruit quality of Fuji apple trees on dwarfing rootstocks.

Variable
X

Regression
equation

Correlation
coefficientw

Estimated Y valuefor Xvalues of_____
161820222426 cm

Y

ASLz
ASL
ASL

Yield (kg)
% PCF (%)y
Brix (%)x

Y= 1.73+ 1.29X
Y= -29.5 + 2.61X
Y= 18.9- 0.12X

0.48*
0.78**
0.61**

22.4
12.3
17.0

25.0
17.5
16.7

27.5
22.7
16.5

30.1
27.9
16.3

32.7
33.1
16.0

35.3
38.4
15.8

zAverage shoot length.
y% of poor colored fruit which colored less than 30% of surface.
xAverage brix of fruit.
w*Significant at 5% level, ** at 1% level.