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IITA Accessions 2

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Descriptors for Maize Characterization

Descriptors Maize Characterization

Authors:

1. Days to 50% flowering

Days from planting to 50% flowering

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

2. Days to harvesting

Days from planting to harvesting

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

3. Anthocyanin color of shealth

Anthocyanin color of shealth

Data type: java.lang.Integer.

1 - Weak
2 - Strong
3 - Absent
4 - Present

4. Angle between blade and stem

Angle between blade and stem

Data type: java.lang.Integer.

1 - Small (< 25 degree)
2 - Medium ( 25 - 75 degree)
3 - Large( >75 degree)

5. Attitude of blade on leaf above upper ear

Attitude of blade on leaf above upper ear

Data type: java.lang.Integer.

1 - Very strongly curved
2 - Curved
3 - Straight

6. Degree of zig zag

Degree of zig zag

Data type: java.lang.Integer.

1 - Absent
2 - Present

7. Anthocyanin color of brace roots

Anthocyanin color of brace roots

Data type: java.lang.Integer.

1 - Present
2 - Absent

8. Days to tasselling

Days to tasselling

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

9. Anthocyanin colouration at base of glume

Anthocyanin colouration at base of glume

Data type: java.lang.Integer.

1 - Present
2 - Absent

10. Anthocyanin colouration of glumes excluding the base

Anthocyanin colouration of glumes excluding the base

Data type: java.lang.Integer.

1 - Absent
2 - Present

11. Anthocyanin coloration of anthers in the middle 3rd of main axis

Anthocyanin coloration of anthers in the middle 3rd of main axis

Data type: java.lang.Integer.

1 - Present
2 - Absent

12. Density of spikelet in middle 3rd of main axis

Density of spikelet in middle 3rd of main axis

Data type: java.lang.Integer.

1 - Dense
2 - Medium
3 - Lax

13. Angle between main and lateral branch

Angle between main and lateral branch

Data type: java.lang.Integer.

1 - Medium (25-75 degree)
2 - Small (< 25 degree)
3 - Large (>75 degree)
4 - Small (<25 degree)

14. Attitude of lateral branch in lower third of tassel

Attitude of lateral branch in lower third of tassel

Data type: java.lang.Integer.

1 - Strongly curved
2 - Curved
3 - Straight

15. Number of primary and lateral branches

Number of primary and lateral branches

Data type: java.lang.Double.

16. Days to ear time of 50% silk emergence

Days to ear time of 50% silk emergence

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

17. Anthocyanin color of silks

Anthocyanin color of silks

Data type: java.lang.Integer.

1 - Absent
2 - Present

18. Anthocyanin colouration of sheath in the middle of plant

Anthocyanin colouration of sheath in the middle of plant

Data type: java.lang.Integer.

1 - Absent
2 - Present
3 - Medium
4 - Strong

19. Length of main axis above lowest side branch

Length of main axis above lowest side branch

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

20. Length of main axis above upper side branch

Length of main axis above upper side branch

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

21. Plant height

Plant height

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

22. Plant length

Plant length measured up to flag leaf

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

23. Height of insertion of upper ear

Height of insertion of upper ear

Data type: java.lang.Double.

24. Width of blade (leaf of upper ear)

Width of blade (leaf of upper ear)

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

25. Ear length of peduncle

Ear length of peduncle

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

26. Ear length without husk

Ear length without husk

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

27. Length of peduncle

Length of peduncle

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

28. Ear diameter without husk (in middle)

Ear diameter without husk (in middle)

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

29. Ear shape

Ear shape

Data type: java.lang.Integer.

1 - Cylindrical
2 - Conico-cylindrical
3 - Conical

30. Number of rows of grains

Number of rows of grains

Data type: java.lang.Double.

31. Color of top of grain

Color of top of grain

Data type: java.lang.Integer.

1 - White with cap
2 - Yellow
3 - White
4 - Yellow with cap
5 - Orange
6 - Blue-black
7 - Dark red
8 - Mixed color
9 - Red
10 - Blue black
11 - mixture

32. Color of dorsal side of grain

Color of dorsal side of grain

Data type: java.lang.Integer.

1 - White
2 - Yellow
3 - Yellow-orange
4 - Yellowish-white
5 - Blue-black
6 - Orange
7 - Dark-red
8 - Mixed color
9 - Red
10 - Yellowish white
11 - Red orange
12 - Orrange
13 - Blue black
14 - Mixtured color
15 - Mixture
16 - Yellow orrange

33. Anthocyanin coloration of glumes of cob

Anthocyanin coloration of glumes of cob

Data type: java.lang.Integer.

1 - White
2 - Light purple
3 - Dark purple

34. Kernel row arrangement

Kernel row arrangement

Data type: java.lang.Integer.

1 - Straight
2 - Spiral
3 - Irregular

35. Grain shape

Grain shape

Data type: java.lang.Integer.

1 - Pointed
2 - Shrunken
3 - Round
4 - Indented

36. Plant length up to flag leaf

Plant length up to flag leaf

Data type: java.lang.Double.

IITA Accession - ver. 2  
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