AfricaRice descriptors for Rice

1.0

List of traits used for characterization of rice accessions. Descriptors are based on Standard Evaluation System for Rice (SES) and the Descriptors for wild and cultivated rice (Oryza spp.) published by Bioversity International, IRRI and WARDA, 2007.

Crop
Rice
Publisher
Not specified
Version
1.0

Number of days from effective seeding until 80% of the plants are heading

Classification
Characterization descriptor
Data type
Numeric

Number of days from effective seeding until 80% of the grains on the panicles are fully ripened

Classification
Characterization descriptor
Data type
Numeric

Measure the highest leaf below the flag leaf (penultimate leaf) on the main culm from the ligule to the tip of the blade on five representative plants. Calculate average to nearest centimeter.

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Measure at the widest portion of the penultimate leaf (i.e. highest leaf below the flag leaf) on the main culm on five representative plants. Calculate average to nearest cm. Oryza sativa leaf can be coded as narrow (< 1 cm), internediate (1-2 cm) or broad (>2 cm).

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Measured near the collar. Angle of attachment between the flag leaf blade and the main panicle axis. Record the average of five samples.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Erect
3Semi-erect (intermediate)
5Horizontal
7Descending

Measured from ground level to the base of the panicle. Record the average of five actual measurements, to the nearest cm.

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

The presence and distribution of awns along the panicle. Stage: flowering to maturity.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0None (awnless)
1Tip only
2Upper quarter only
3Upper half only
4Upper three-quarters only
5Whole length

Length of main axis of panicle measured from the panicle base to the tip. Record the average of five representative plants. Stage: 7 days after anthesis or upon full panicle exsertion.

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
cm

Stage: near maturity

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Upright
2Semi-upright
3Slightly drooping
4Strongly drooping

The compactness of the panicle, classified according to its mode of branching, angle of primary branches, and spikelet density.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Erect (compact panicle)
3Semi-erect (semi-compact panicle)
5Spreading (open panicle)
7Horizontal
9Drooping

Culm Angle - rice direct-seeded in rows.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1ERECT
2ERECT
3INTERMEDIATE
4INTERMEDIATE
5OPEN
6OPEN
7SPREADING
8SPREADING
9PROCUMBENT
10MIXTURE

Awn color

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0ABSENT
1WHITISH
2STRAW
3GOLD
4BROWN
5LIGHT GREEN
6RED
7PURPLE
8BLACK

Basal leaf sheath color at vegetative

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1GREEN
2GREEN WITH PURPLE LINES
3LIGHT PURPLE
4PURPLE

Culm diameter of basal internode at reproductive in millimeter

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm

Count tillers with panicles and those without panicles on 5 samples

Classification
Characterization descriptor
Data type
Numeric

Count only the tillers with panicles on 5 samples.

Classification
Characterization descriptor
Data type
Numeric

Ligule length in millimeter

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm

Ligule shape

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
0ABSENT
1ACUTE TO ACUMINATE
2CLEFT
3TIP ROUND OR TRUNCATE
3TRUNCATE
MXMIXTURE

Panicle exsertion at reproductive

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1WELL EXSERTED
2WELL EXSERTED
3MODERATELY WELL EXSERTED
4MODERATELY WELL EXSERTED
5JUST EXSERTED
6JUST EXSERTED
7PARTLY EXSERTED
8PARTLY EXSERTED
9ENCLOSED
MXMIXTURE

Panicle shattering

Classification
Characterization descriptor
Data type
Numeric

Proportion of plants that have lodged by maturity

Classification
Characterization descriptor
Data type
Numeric

Record the average length of five spikelets. For spikelets with symmetrical sterile lemmas (i.e. sterile length the same on both sides), record the length here. For spikelets with asymmetrical sterile lemmas (i.e. sterile lemma on one side longer than that on the other), record here only the length of the shorter sterile lemma (see below for the longer sterile lemma).

Classification
Characterization descriptor
Data type
Scale
3
4
5
6
7
8
9

Legend:

3
Short
5
Medium
7
Long
9
Extra long

Thousand kernel weight of brown rice, based on a count of 100 or more.

Classification
Characterization descriptor
Data type
Numeric
Unit of measure
g
Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm

Determined using the colorimetric determination method (AAC Method 61-03.01).

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%

Peak viscosity in centipoise (cP) was determined by Rapid Visco-Analysis

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
cP

Peak Viscosity minus Trough Viscosity

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
cP
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
cP

Final Viscosity minus Peak Viscosity

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
cP
Classification
Evaluation descriptor
Data type
Numeric

Pasting temperature derived from the Rapid Visco-analysis

Classification
Evaluation descriptor
Data type
Numeric

Peak viscosity in centipoise (cP) was determined by Rapid Visco-Analysis

Classification
Evaluation descriptor
Data type
Numeric

Protein content at dry moisture basis or zero moisture) %

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
g
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
g
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
g
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
g

Head rice ratio determined as the proportion of whole grain in a 100 g sample

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
g
Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm
Classification
Characterization descriptor
Data type
Numeric
Unit of measure
mm

Length to width ratio determined by S21 statistical rice analyzer

Classification
Characterization descriptor
Data type
Numeric
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%

Chalkiness determined by S21 statistical rice analyzer

Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%

Lightness determined by Colorimetry

Classification
Evaluation descriptor
Data type
Numeric

Redness determined by Colorimetry

Classification
Evaluation descriptor
Data type
Numeric
Classification
Evaluation descriptor
Data type
Numeric
Classification
Evaluation descriptor
Data type
Numeric
Unit of measure
%