Descriptor list details

IITA Musa species morphological descriptors

2015

IITA Musa species morphological descriptors using 2015 revised version

Crop
Banana
Publisher
IPGRI
Version
2015

Recorded from the base of the pseudostem to the emerging point of the peduncle

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1≤2
22.1 to 2.9
3≥3

Record the overall impression of colour of the exposed surface of the underlying pseudostem. main colour’ should cover more than 75% of the underlying pseudostem surface.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Cream
2Yellow
3watery green
4Green yellow
5Light green
6Medium green
7Green
8Dark green
9whitish
10Orange red
11Red
12Pink-purple
13Purple- brown
14Red-purple
15Purple
16Blue

Record the relative surface area coverage by blotches.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1No pigmentation
2Sparse blotching<20%
3Moderate blotching20%-50%
4Extensive pigmentation>50%

scored on the upper leaf sheath

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Mahoganyorange-brown like in Pisang Mas
2Brown
3Black-purple

The third leaf (Leaf III) is counted from the last leaf produced before bunch emergence. Cut the petiole halfway between the pseudostem and the leaf blade and examine the cross section

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Margins spreading
2Margins erect
3Margins curved inward
4Margins overlapping

Margin is the part of the petiole that can be bent outwards/inwards

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Winged
2Not winged

Observation should be made at shooting on the neck, where the petiole and pseudostem meet. Margin is the part of the petiole that can be bent outwards/inwards

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Clasping
2Not clasping
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Cream
2Yellow
3Watery green
4Green yellow
5Light green
6Medium green
7Green
8Dark green
9Whitish
10Orange red
11Red
12Pink-purple
13Purple-brown
14Red-purple
15Purple
16Blue

Observation should be made at shooting. Record on the last developed leaf at flowering stage.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1No contrast between margin and petiolewithout a colour line along
2Contrast between margin and petiolewith a contrasting colour line along

Observation should be made before shooting, on a developed sucker or on another plant of the same accession.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Green
2Red-purple
3Otherspecify on answer sheet

Angle between the axis of the bunch and the vertical

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Hanging vertically
2Slightly angled
3Hanging at a 45° angle
4Horizontal
5Erect

Score on fully developed plant with no environmental stress

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Cylindricalall fruit are attached to a unique crown coiled around the stalk
2Truncate (= cone shaped)
3Asymmetrical
4Spiral

Observe only the part of the rachis between the last hand and the male bud

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Falling vertically
2At an angle
3With a curve
4Horizontal or supra-horizontal
5Erect
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Bare
2Neutral flowers on one to few hands only near the bunchrest of stalk is bare
3Male flowers/bracts above the male budrest of stalk is bare
4Neutral/male flowers and presence of withered bracts on the entire stalk
5Neutral/male flowers on the whole stalk without persistent bractsstill firmly attached to the rachis
6Small bunch from neutral/hermaphrodite flowers just above the male bud
7Otherspecify on answer sheet

Measure the length (y) of male bud at harvest

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Shorty ≤ 20 cm
2Medium20 cm < y < 30 cm
3Long≥ 30 cm

Calculate the ratio x/y

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1High shoulderedx/y ≤ 0.28
2Medium shouldered0.28 < x/y < 0.30
3Low shoulderedx/y ≥ 0.30

Refers to the first external unlifted bract. Flatten bracts to determine shape.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Pointed
2Intermediate
3Obtuse

Alignment of bracts at the apex of the male bud

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Convolute
2Moderately imbricate
3Highly imbricate
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Present
2Absent

Refers to the last lifted bract. Best to record as bract has lifted up to the horizontal.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Revoluterolling
2Not revolutenot rolling

Refers to the first external unlifted bract

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Cream
2Yellow
3Watery green
4Green yellow
5Light green
6Medium green
7Green
8Dark green
9Whitish
10Orange red
11Red
12Pink-purple
13Purple-brown
14Red-purple
15Purple
16Blue
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Cream
2Yellow
3Watery green
4Green yellow
5Light green
6Medium green
7Green
8Dark green
9Whitish
10Orange red
11Red
12Pink-purple
13Purple-brown
14Red-purple
15Purple
16Blue
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1White
2Cream
3Ivory
4Yellow
5Bright yellow
6Orange
7Orange red
8Red
9Red-purple
10Pink/pink-purple
11Brown/Rusty-brown
12Beige-pink
13Silvery
14Light green
15Green
16Dark Green
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1White
2Cream
3Ivory
4Yellow
5Bright yellow
6Orange
7Orange red
8Red
9Red-purple
10Pink/pink-purple
11Brown/Rusty-brown
12Beige-pink
13Silvery
14Light green
15Green
16Dark Green
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1White
2Cream
3Ivory
4Yellow
5Bright yellow
6Orange
7Orange red
8Red
9Red-purple
10Pink/pink-purple
11Brown/Rusty-brown
12Beige-pink
13Silvery
14Light green
15Green
16Dark Green
Classification
Characterization descriptor
Data type
Numeric

Count only fully developed fruit. If there is an even number of hands take the upper middle one

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1≤12
213-16
3≥17

at maturity

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1≤15 cm
216-20 cm
321-25 cm
426-30 cm
5≥31 cm

Observe the inner fruit in the middle of the mid-hand of the bunch. In case of an asymmetric bunch that has straight and curved fruits, please indicate it in the note section and score only the fruit on the upper side of the bunch.

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Straightor slightly curved
2Straight in the distal part
3Curvedsharp curve
4Curved in slight 'S' shapedouble curvature
5Other
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Pointed
2Lengthily pointedlike plantain
3Blunt tippedplateau at tip
4Strongly bottle neckedwider under tip than number 2
5Rounded
Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1Without flower relicts<20% of the fruits with relicts
2Persistent flower relicts>20% of the fruits with relicts
3Only base of the style persists

Measure from the scar on the rachis until the beginning of the fruit. Record on the inner fruit in the middle of the mid-hand of the bunch

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1≤10 mm
211 to 20 mm
3≥21 mm

Before they join the rachis at the bract scar. Look up from bottom of bunch

Classification
Characterization descriptor
Data type
Coded
CodeTermDescription
1No visible sign of fusion
2Partially fusedup to 50% of the length of the pedicel
3Totally fusedmore than 50% of the length of the pedicel