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Descriptors for Cassava characterization

Descriptors Cassava characterization

Authors: IITA
Cassava characterization, Ibadan, Nigeria

1. Germination of stakes

Germination of stakes recorded 1 month after planting

Data type: java.lang.Double.

2. Initial vigor

Initial vigor

Data type: java.lang.Integer.

1 - Intermediate
2 - High
3 - Low

3. Colour of unexpanded apical leaves

Colour of unexpanded apical leaves recorded 3 months after planting

Data type: java.lang.Integer.

1 - Light green
2 - Dark green
3 - Green purple
4 - Purple
5 - Green

4. Colour of first fully expanded leaf

Colour of first fully expanded leaf observed 3 months after planting

Data type: java.lang.Integer.

1 - Green
2 - Dark green
3 - Light green
4 - Green purple
5 - Purple

5. Leaf vein colour

Leaf vein colour recorded 3 months after planting

Data type: java.lang.Integer.

1 - Green purple
2 - Light green
3 - Dark green
4 - Purple

6. Pubescence of young leaves

Pubescence of young leaves 3 months after planting

Data type: java.lang.Integer.

1 - Moderate Pubescence
2 - Light Pubescence
3 - Absent
4 - High Pubescence

7. Leaf venation

Types of leaf venation

Data type: java.lang.Integer.

1 - Craspedodromous
2 - Camptodromous

8. Length of stipules

Length of stipules measure 3 months after planting

Data type: java.lang.Integer.

1 - Short
2 - Long
3 - Medium

9. Number of lobes

Counts of the number of leaf lobes

Data type: java.lang.Double.

10. Petiole length

Petiole length measured 3 months after planting

Data type: java.lang.Integer.

1 - Long (25-30cm)
2 - Short (5-10cm)
3 - Medium (15-20cm)
4 - Long(25-30cm)
5 - Medium(15-2-cm)

11. Petiole colour

Petiole colour recorded 3 months after planting

Data type: java.lang.Integer.

1 - Purple
2 - Green purple
3 - Light green
4 - Red
5 - Dark green

12. Distribution of anthocyanin

Distribution of anthocyanin recorded 3 months after planting

Data type: java.lang.Integer.

1 - Totally pigmented
2 - Central part
3 - Absent
4 - Top part
5 - Top and bottom
6 - Totally Pigmented
7 - Top & Bottom
8 - Bottom

13. Pubescence of young stem

Pubescence of young stem observed 3 months after planting

Data type: java.lang.Integer.

1 - Little pubescence
2 - Absent
3 - Moderate pubescence
4 - High pubescence
5 - Little Pubsecence
6 - High Pubescence
7 - Moderate Pubescence

14. Number of plants remaining per accessions

Total number of plants remaining per accessions after 3 months

Data type: java.lang.Double.

15. Fruit set

Observation for fruit setting

Data type: java.lang.Integer.

1 - Absent
2 - Present

16. Fruit set level

Quantity of fruit set

Data type: java.lang.Integer.

1 - Absent
2 - Low
3 - High
4 - Average

17. Status

Status

Data type: java.lang.String.

18. Ploidy level

Type of ploidy level

Data type: java.lang.Integer.

1 - 2x

19. Severity of CAD

Severity of CAD

Data type: java.lang.String.

20. Leaf retention

Quantity of leaf retained

Data type: java.lang.Integer.

1 - 25-50% leaf retention
2 - 50-75% leaf retention
3 - <100% leaf retention
4 - <25% leaf retention
5 - 100% leaf retention

21. Stay green ability

Ability of the plants to stay green

Data type: java.lang.Integer.

1 - <100%
2 - 50-75%
3 - 25-50%
4 - 100%
5 - <25%

22. Number of plants remaining per accession

Total number of plants remaining per accession at 6months after planting

Data type: java.lang.Integer.

1 - 1
2 - 2
3 - 3
4 - 4
5 - 5

23. Level of branching at the end of flowering

Level of branching at the end of flowering

Data type: java.lang.Integer.

0 - 0
1 - 1
2 - 2
3 - 3
4 - 4
5 - 5
5 - 5
5 - 5

24. Colour of boiled tuberous root

Colour of boiled tuberous root

Data type: java.lang.Integer.

1 - White
2 - Cream
3 - Yellow

25. Height of the first apical branch

Height of the first apical branch [cm]

Unit of measure, suffix: cm. Data type: java.lang.Integer.

0 -
0 - 0
1 - 1
2 - 2
35 - 35
40 - 40
43 - 43
45 - 45
47 - 47
49 - 49
50 - 50
51 - 51
52 - 52
53 - 53
54 - 54
55 - 55
56 - 56
57 - 57
60 - 60
61 - 61
63 - 63
64 - 64
65 - 65
66 - 66
67 - 67
68 - 68
69 - 69
70 - 70
71 - 71
72 - 72
73 - 73
74 - 74
75 - 75
76 - 76
77 - 77
78 - 78
79 - 79
80 - 80
81 - 81
82 - 82
83 - 83
84 - 84
85 - 85
86 - 86
87 - 87
88 - 88
89 - 89
90 - 90
91 - 91
92 - 92
93 - 93
94 - 94
95 - 95
96 - 96
97 - 97
99 - 99
100 - 100
101 - 101
102 - 102
104 - 104
105 - 105
106 - 106
107 - 107
108 - 108
109 - 109
110 - 110
111 - 111
112 - 112
113 - 113
114 - 114
116 - 116
118 - 118
121 - 121
122 - 122
125 - 125
126 - 126
127 - 127
128 - 128
130 - 130
131 - 131
132 - 132
134 - 134
135 - 135
136 - 136
137 - 137
145 - 145
146 - 146
148 - 148
149 - 149
150 - 150
152 - 152
154 - 154
155 - 155
156 - 156
157 - 157
162 - 162
166 - 166
168 - 168
174 - 174
176 - 176
180 - 180
181 - 181
184 - 184
185 - 185
189 - 189
190 - 190
195 - 195
196 - 196
197 - 197
200 - 200
208 - 208
257 - 257
276 - 276

26. Growth habit of young stem

Growth habit of young stem

Data type: java.lang.Integer.

1 - Straight
2 - Zig zag
3 - straight
4 - Zigzag

27. Stem colour

Stem colour

Data type: java.lang.Integer.

1 - Silver green
2 - Dark brown
3 - Light brown orange
4 - Dark green
5 - Light brown or orange

28. Number of levels of branching

Number of levels of branching

Data type: java.lang.Double.

29. Angle of branching

Angle of branching

Data type: java.lang.Integer.

1 - No branching
2 - 150-300
3 - 450-600
4 - 750-900
5 - 45◦-60◦
6 - Non branching
7 - 15◦-30◦
8 - 75◦-90◦

30. Colours of unexpanded apical leaves at 9 months

Colours of unexpanded apical leaves at 9 months

Data type: java.lang.Integer.

1 - Dark green
2 - Light green
3 - Green
4 - Green purple
5 - Purple

31. Colour of first fully expanded leaf at 9 months

Colour of first fully expanded leaf at 9 months

Data type: java.lang.Integer.

1 - Light green
2 - Dark green
3 - Green
4 - Green purple
5 - Purple

32. Leaf vein colour at 9 months

Leaf vein colour at 9 months

Data type: java.lang.Integer.

1 - Green purple
2 - Light green
3 - Dark green
4 - Purple
5 - Green

33. Pubescence of young leaf at 9 months

Pubescence of young leaf at 9 months

Data type: java.lang.Integer.

1 - Moderately pubescence
2 - Absent
3 - Light pubescence
4 - Highly pubescence
5 - Little pubescence
6 - Moderate pubescence
7 - High pubescence

34. Total number of plants remaining per accession at 9 months

Total number of plants remaining per accession at 9 months

Data type: java.lang.Double.

35. Length of stipules at 9 months

Length of stipules at 9 months

Data type: java.lang.Integer.

1 - Short
2 - Long
3 - Medium

36. Petiole length at 9 months

Petiole length at 9 months

Data type: java.lang.Integer.

1 - Medium (15-20cm)
2 - Long (25-30cm)
3 - Short (5-10cm)

37. Petiole colour at 9 months

Petiole colour at 9 months

Data type: java.lang.Integer.

1 - Green purple
2 - Purple
3 - Light green
4 - Red
5 - Dark green

38. Distribution of anthocyanin at 9 months

Distribution of anthocyanin at 9 months

Data type: java.lang.Integer.

1 - Top and bottom
2 - Central part
3 - Totally pigmented
4 - Absent
5 - Bottom
6 - Top part

39. Pubescence of young stem at 9 months

Pubescence of young stem at 9 months

Data type: java.lang.Integer.

1 - Light pubescence
2 - Absent
3 - Moderately pubescence
4 - Highly pubescence

40. Storage root peduncle

Storage root peduncle

Data type: java.lang.Integer.

1 - Intermediate
2 - Short
3 - Absent
4 - Long

41. Storage root form

Storage root form

Data type: java.lang.Integer.

1 - Conical-Cylindrical
2 - Conical
3 - Fusiform
4 - Combination of various forms of shapes
5 - Cylindrical
6 - Irregular

42. Storage root constrictions

Storage root constrictions

Data type: java.lang.Integer.

1 - Present
2 - Absent

43. Position of root

Position of root

Data type: java.lang.Integer.

1 - Tending toward horizontal
2 - Irregular
3 - Tending toward vertical

44. Total number of plants remaining per accession at 12 months

Total number of plants remaining per accession at 12 months

Data type: java.lang.Double.

45. Storage root surface colour

Storage root surface colour

Data type: java.lang.Integer.

1 - Dark brown
2 - Light brown
3 - White or Cream

46. Skin texture

Skin texture

Data type: java.lang.Integer.

1 - Medium
2 - Smooth
3 - Rough

47. Storage root length

Storage root length

Data type: java.lang.Integer.

1 - Medium
2 - Long
3 - Short

48. Storage root diameter

Storage root diameter

Data type: java.lang.Integer.

1 - Medium
2 - Long
3 - Short

49. Number of storage root per plant

Number of storage root per plant

Data type: java.lang.Double.

50. Total root number per plant

Total root number per plant

Data type: java.lang.Double.

51. Total fresh weight of storage root per plant

Total fresh weight of storage root per plant

Unit of measure, suffix: kg. Data type: java.lang.Double.

52. Total root weight per plant

Total root weight per plant

Data type: java.lang.Double.

53. Total fresh weight of storage shoot per plant

Total fresh weight of storage shoot per plant

Unit of measure, suffix: kg. Data type: java.lang.Double.

54. Total shoot weight per plant

Total shoot weight per plant

Data type: java.lang.Double.

55. Total plant weight

Total plant weight

Data type: java.lang.Double.

56. Average plant weight

Average plant weight

Data type: java.lang.Double.

57. Ease of root periderm (outer skin) removal

Ease of root periderm (outer skin) removal

Data type: java.lang.Integer.

1 - Average
2 - Ease
3 - Difficult

58. Ease of rooe cortex (inner skin) removal

Ease of rooe cortex (inner skin) removal

Data type: java.lang.Integer.

1 - Average
2 - Ease
3 - Difficult

59. Inner skin colour

Inner skin colour

Data type: java.lang.Integer.

1 - White/cream
2 - Yellow
3 - Purple

60. Pulp colour

Pulp colour

Data type: java.lang.Integer.

1 - White/cream
2 - Yellow

61. Amount of rotted storage root per plant

Amount of rotted storage root per plant

Data type: java.lang.Double.

62. Storage root dry matter

Storage root dry matter

Unit of measure, suffix: %. Data type: java.lang.Double.

IITA Accession - ver. 2  
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