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

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.

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).

Ligule length in millimeter

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

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.

Proportion of plants that have lodged by maturity

Culm diameter of basal internode at reproductive in millimeter

Ligule shape

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

The compactness of the panicle, classified according to its mode of branching, angle of primary branches, and spikelet density. See Fig. 7. Stage: cultivated species, near maturity; wild species, 7 days after anthesis

Panicle exsertion at reproductive

Culm Angle - rice direct-seeded in rows.

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

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

Estimated amount of plant lodging near maturity.

Ligule shape

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