Manual for the Characterization and Evaluation of Mulberry Genetic Resources

Primary Characters: Morphological characters such as leaf and bud
Secondary Characters: Agronomical characters such as sprouting and disease resistance
Tertiary Characters: Commercial characters on agricultural productions such as yield and quality

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Click the following blue item to confirm an evaluation method of each characteristic.
Essential Primary Characters 　　　　　　　 Essential Secondary Characters
1 Leaf size 1 Sprouting date
2 Leaf lobation 2 Hardening of leaves
3 Leaf thickness 3 Cold tolerance
4 Tree form 4 Resistance to dwarf disease
5 Shoot length 5 Resistance to bacterial blight
6 No. of shoots 6 Resistance to powdery mildew
7 Shoot size
8 Internodal distance
9 No. of lateral shoots Optional  Secondary Characters
1 Uniformity of sprouting
2 Ratio of non-sprouting buds in spring-rearing season
Optional Primary Characters 3 Length of sproutless portion on the lower part of a previous-year shoot
1 Phyllotaxis 4 Development of new shoots
2 Leaf angle 5 Sprouting ability after intermediate cutting
3 Leaf shape 6 Ease of leaf-stripping
4 Leaf-tip shape 7 Stiffening and defoliation in the lower part of shoot
5 leaf-bottom shape 8 Lodging resistance
6 Depth of leaf lobation 9 Rooting ability
7 Leaf serration 10 Resistance to die-back
8 Leaf color 11 Resistance to rust
9 Leaf gloss 12 Resistance to twig blight
10 Texture of leaf surface
11 Leaf wrinkle
12 Density of leaf trichome Essential Tertiary Characters
13 Petiole length 1 Weight of mulberry shoots in spring-rearing season
14 Petiole width 2 Ratio of new shoots in spring-rearing season
15 Petiole thickness 3 Weight of mulberry shoots in late autumn-rearingseason
16 Shape of petiole scar 4 Leaf weight ratio in late autumn-rearingseason
17 Curve of the shoot 5 Total yield per year
18 Shoot color
19 Texture of shoot surface
20 Lenticel size Optional Tertiary Characters
21 Lenticel density 1 Nutrient value (nitrogen content)
22 Behavior of winter buds
23 Shape of winter buds
24 Size of winter buds
25 Color of winter buds
26 Number of accessory buds
27 Sex expression
28 Number of flower clusters
29 Style length
30 Fruit length
31 Fruit shape
32 Fruit color
33 Seed size
34 Seed shape
35 Seed color
36 Chromosome number
37 Isozyme pattern