Agriculture Reference
In-Depth Information
TABLE 4:
Traits observed.
Trait
Details, scale or unit
Petiole length
mm
Leaf blade length
mm
Leaf blade width
mm
Leaf blade intensity of green
Visual assessment: 1-very light, 2-light, 3-me-
dium, 4-dark, 5-very dark
Leaf color
Measured with a chromameter—model Minolta
CR-200—(average of 3 measurements per leaf*,
each measurement gives 3 parameters: L (light
saturation), A (yellow-blue axis, negative values
yellow, positive values blue, and B (green-red
axis, negative values green, positive values red)
(Hunter Labs, 1996))
Anthocyanin on the stem
1-presence, 2-absence
Petiole attitude
1-horizontal, 2-semi-erect, 3-erect
Leaf blad attitude
1-semi-pendulous, 2-horizontal, 3-semi-erect,
4-erect
Leaf blade shape of apex
1-acute, 2-obtuse, 3-rounded
Thickness
1-very fine, 2-fine, 3 medium, 4-thick, 5-very
thick
Leaf blade blistering
1-absent or very weak, 2-weak, 3-medium,
4-strong, 5-very strong
Bolting index
0-not bolted (0%), 1-very little bolted (1 to
25%), 2-moderately bolted (25 to 75%), 3-bolt-
ed (75 to 100%)
Bolting index
3 dates of observation: 22 May, 29 May, 4 June,
2009
Petiole length
mm
Leaf blade length
mm
Leaf blade width
mm
Flowering index
0-not flowered (0%), 1-little flowered (1 to
25%), 2-medium flowered (25 to 75%), 3-flow-
ered (75 to 100%)
3 dates of observation: 22 May, 29 May, 4 June
2009
* The 3 measurements were taken in the three zones of the leaf indicated in Figure 3.
