Descriptors for banana (Musa spp.)

1996

Descriptors for banana (Musa spp.)

Crop
Banana
Publisher
IPGRI
Bibliographic citation

(IPGRI), I. P. G. R. I. (1984). Descriptors for Banana (Musa spp.). Bioversity International: research for development in agricultural and tree biodiversity.

Version
1996
Classification
Characterization
Data type
Coded
CodeTermDescription
1Erect
2Intermediate
3Drooping
4Others
Classification
Characterization
Data type
Coded
CodeTermDescription
1Normal: leaves not overlapped and leaf ratio inferior to 2.5
2Dwarf type: leaves strongly overlapped and leaf ratio superior to 2.5

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

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

Determined by the circumference at 100 cm

Classification
Characterization
Data type
Coded
CodeTermDescription
1Slender
2Normal
3Robust

Recorded without removing the external sheaths. The colour of oldest dry sheaths should not be considered. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Green-yellow
2Medium green
3Green
4Dark green
5Green-red
6Red
7Red-purple
8Blue
9Chimerical
10Other

Recorded as in 6.2.3

Classification
Characterization
Data type
Coded
CodeTermDescription
1DullWaxy
2ShinyNot waxy

Remove the outermost sheath from the pseudostem and look at the exposed surface of the underlying pseudostem. The values 5 (pink-purple), 6 (red-purple) and 7 (purple) must be chosen only if the pigmentation is uniform, and green tinges are not observed. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Watery green
2Light green
3Green
4Cream
5Pink-purple
6Red-purple
7Purple
8Others

Record the tinge of pigmentation, even if it is only noticeable in places. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Pink-purple
2Red
3Purple
4Others

Cut the external sheath of pseudostem and record the characteristics of the sap. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Watery
2Milky
3Red-purple
4Others
Classification
Characterization
Data type
Coded
CodeTermDescription
1Very little or no visible sign of wax
2Very few wax
3Moderately waxy
4Very waxy

Record the number of suckers from soil level to point of emergence of the last leaf (>30 cm height). Recorded only if no desuckering has taken place

Classification
Characterization
Data type
Numeric

In relation to the parent plant. Observed on the tallest sucker. Recorded at harvest time

Classification
Characterization
Data type
Coded
CodeTermDescription
1Taller than parent plant
2More than 3/4 of the height of the parent plant
3Between 1/4 and 3/4 of the height of the parent plant
4Inhibited
Classification
Characterization
Data type
Coded
CodeTermDescription
1Far from parent plantEmerging >50 cm from parent plant
2Close to parentVertical growth
3Close to parentGrowing at an angle

Recorded on the third, fully unfolded leaf counting down from the top of the plant. (See Fig. 5)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Sparse blotching
2Small blotches
3Large blotches
4Extensive pigmentation
5Without pigmentation

Recorded on the third, fully unfolded leaf counting down from the top of the plant. (See Fig. 5)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Brown
2Dark brown
3Brown-black
4Black-purple
5OtherSpecify in descriptor Notes, 6.8

Leaf III is the third leaf counted from the last leaf (leaf I) produced before bunch emergence. Cut the petiole half way between the pseudostem and the leaf blade and examine the cross section. (See Figs. 4 and 6)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Open with margins spreading
2Wide with erect margins
3Straight with erect margins
4Margins curved inward
5Margins overlapping
Classification
Characterization
Data type
Coded
CodeTermDescription
1Winged and undulating
2Winged and not clasping the pseudostem
3Winged and clasping the pseudostem
4Not winged and clasping the pseudostem
5Not winged and not clasping the pseudostem
Classification
Characterization
Data type
Coded
CodeTermDescription
1Dry
2Not dry
Classification
Characterization
Data type
Coded
CodeTermDescription
1Green
2Pink-purple to red
3Purple to blue
4OtherSpecify in descriptor Notes, 6.8
Classification
Characterization
Data type
Coded
CodeTermDescription
1ColourlessWithout a colour line along
2With a colour line along
Classification
Characterization
Data type
Coded
CodeTermDescription
1≤1 cm
2>1 cm
3Cannot be defined

Measured at its maximum point

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤170 cm
2171 to 220 cm
3221 to 260 cm
4≥261 cm

Measured at its maximum point

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤70 cm
271 to 80 cm
381 to 90 cm
4≥91 cm
Classification
Characterization
Data type
Scale
0
1
2
3
4
5
6
7

Legend:

3

≤2

5

2.4 to 2.6

7

≥3

Recorded from the pseudostem to the lamina

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤50 cm
251 to 70 cm
3≥71 cm
Classification
Characterization
Data type
Coded
CodeTermDescription
1Green-yellow
2Medium green
3Green
4Dark green
5Dark green with red-purplePresence of large blotches of red-purple
6Blue
7OtherSpecify in descriptor Notes, 6.8
Classification
Characterization
Data type
Coded
CodeTermDescription
1Dull
2Shiny

(Wax removed). (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Green-yellow
2Medium green
3Green
4Dark green
5Blue
6Red-purple
7Others
Classification
Characterization
Data type
Coded
CodeTermDescription
1Dull
2Shiny

Recorded on the lower surface

Classification
Characterization
Data type
Coded
CodeTermDescription
1Very little or no visible sign of wax
2Few wax
3Moderately waxy
4Very waxy
Classification
Characterization
Data type
Coded
CodeTermDescription
1Symmetric
2Asymmetric
Classification
Characterization
Data type
Coded
CodeTermDescription
1Both sides rounded
2One side rounded, one pointed
3Both sides pointed

Presence of ridges perpendicular to the secondary ribs on the leaf upper surface

Classification
Characterization
Data type
Coded
CodeTermDescription
1Even, smooth
2Few stripes
3Very corrugated

If pigmentation is seen, options are 4, 5 or 6. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Yellow
2Light green
3Green
4Pink-purple
5Red-purple
6Purple to blue
7Others

If pigmentation is seen, options are 4, 5 or 6. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Yellow
2Light green
3Green
4Pink-purple
5Red-purple
6Purple to blue
7Others

Look at the visible face (future lower face) of the cigar leaf before it is unfurled and before the plant flowers. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Green
2Red-purple
3Others

Observed on young, non inhibited water suckers (if the lamina is sword shaped, it is not a water sucker)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Without blotches
2Little or narrow blotches
3Large purple blotches

Measured from the leaf crown to the first hand of fruit

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤30 cm
231 - 60 cm
3≥61 cm

Record the number of empty nodes between the last bract-leaf and first hand of fruit

Classification
Characterization
Data type
Free text

Recorded at mid-length

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤6 cm
27 - 12 cm
3≥13 cm

Descriptor state 4 (red/or pink-purple) is green homogeneously tinged with red (purple green appearance). When pigmentation is scattered, use state 5. (Chart A)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Light green
2Green
3Dark green
4Red or pink/purple
5With purple-brown to blue blotches
6Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Hairless
2Slightly hairy
3Very hairy, short hairsSimilar to velvet touch
4Very hairy, long hairs>2 mm

(Position of the fruit-bearing part). Angle from vertical to the general axis of the bunch

Classification
Characterization
Data type
Coded
CodeTermDescription
1Hanging vertically
2Slightly angled
3Hanging at angle 45°
4Horizontal
5Erect
Classification
Characterization
Data type
Coded
CodeTermDescription
1Cylindrical
2Truncated cone shape
3Asymmetric - Bunch axis is nearly straight
4With a curve in the bunch axis
5SpiralAll fruit is attached to a unique crown coiled around the stalk
Classification
Characterization
Data type
Coded
CodeTermDescription
1Lax:One can easily place one’s hand between the hands of fruit
2Compact:One can place one’s finger, but not one’s hand, between the hands of fruit
3Very compact:One cannot place one’s finger between the hands of fruit

Record at flowering if the flowers of the first hands bear apparently functional stamens

Classification
Characterization
Data type
Coded
CodeTermDescription
1Female (absence of pollen sacs or pollens
2HermaphroditePresence of pollen sacs and pollens

Positioning of fruits on the crown

Classification
Characterization
Data type
Coded
CodeTermDescription
1Uniseriate
2Biseriate
3Biseriate and fused

For the following descriptors, observe only that part of the rachis between the last hand of fruit and the male bud

Classification
Characterization
Data type
Coded
CodeTermDescription
1Truncated, no bract scar below the last hand of fruit
2Present and male bud may be degenerated or persistent

For the following descriptors, observe only that part of the rachis between the last hand of fruit and the male bud

Classification
Characterization
Data type
Coded
CodeTermDescription
1Falling vertically
2At an angle
3With a curve
4Horizontal
5Erect
Classification
Characterization
Data type
Coded
CodeTermDescription
1Bare
2Neutral flowersOne to few hands only, stalk is bare below
3Male flowers/bracts above the male budBut the stalk is bare above flowers/bracts
4Neutral/male flowers and presence of withered bractsOn the whole stalk
5Neutral/male flowers on the whole stalk without persistent bractsE.g. AA var. ‘Tuu Gia’
6Small bunch from neutral/hermaphrodite flowers just above the male budE.g. ABB var. ‘Monthan’
7Other

Recorded at maturity

Classification
Characterization
Data type
Coded
CodeTermDescription
1NormalPresent
2Degenerating before maturityLike false-horn ‘Plantain’
3Like true-horn ‘Plantain’Absent

Note the general shape of the male bud at harvest. (See Fig. 9)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Like a top
2Lanceolate
3Intermediate
4Ovoid
5Rounded

Length and maximum diameter of male bud at harvest

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤20 cm
221 to 30 cm
3≥31 cm

Descriptors 6.5.1 to 6.5.14 refer to the first external bract that still clings to the male bud

Classification
Characterization
Data type
Coded
CodeTermDescription
1Small shoulder
2Medium
3Large shoulder

Flatten the apex of the bract to observe its shape. (See Fig. 11)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Pointed
2Slightly pointed
3Intermediate
4Obtuse
5Obtuse and split

Note alignment of bracts at the apex of the male bud

Classification
Characterization
Data type
Coded
CodeTermDescription
1Old bracts overlap at apex of budLike Musa acuminata subsp. malaccensis
2Young bracts slightly overlap
3Young bracts greatly overlapLike Musa acuminata subsp. burmanicca
Classification
Characterization
Data type
Coded
CodeTermDescription
1Yellow
2Green
3Red
4Red-purple
5Purple-brown
6Purple
7Blue
8Pink-purple
9Orange-red
10Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Whitish
2Yellow or green
3Orange red
4Red
5Purple
6Purple brown
7Pink-purple
8Other

Recorded on the external face of the bract

Classification
Characterization
Data type
Coded
CodeTermDescription
1Tinted with yellowDiscoloured
2Not tinted with yellowColour is uniform until apex
Classification
Characterization
Data type
Coded
CodeTermDescription
1Without discoloured lines (not ridges) on the external face
2With discoloured lines or stripes on the external face

Recorded on scars left after fall of bracts and flowers

Classification
Characterization
Data type
Coded
CodeTermDescription
1Very prominent
2Not prominent

Observed on the inside of the bract

Classification
Characterization
Data type
Coded
CodeTermDescription
1Colour discontinuing towards the baseLoss of pigmentation at the base
2Colour homogenousPigmentation is uniform and continues until the base
Classification
Characterization
Data type
Coded
CodeTermDescription
1X/y < 0.28Lanceolate
20.28 < x/y <0.30
3X/y > 0.30Ovate

Number of raised bracts present on the male bud

Classification
Characterization
Data type
Coded
CodeTermDescription
1Not lifting from male budBracts are persistent
2Lifting one at a time
3Lifting two or more at a time
Classification
Characterization
Data type
Coded
CodeTermDescription
1RevoluteRolling
2Not revoluteNot rolling

Recorded on the external surface

Classification
Characterization
Data type
Coded
CodeTermDescription
1Very little or no visible sign of wax
2Very few wax
3Moderately waxy
4Very waxy

Observed on the external surface

Classification
Characterization
Data type
Coded
CodeTermDescription
1Few grooves or not groovedThe bract is completely, or almost completely, smooth
2Moderate groovingParallel ridges are distinguishable
3Strongly groovedDeep parallel furrows on the surface of bract

(See Fig. 14). Descriptors 6.6.1 to 6.6.25 refer to the flowers at the axil of the first external bract unlifted. At least 10 flowers should be observed

Classification
Characterization
Data type
Coded
CodeTermDescription
1Falling before the bract
2Falling with the bract
3Falling after the bract
4Neutral/male flowers persistent

Without considering lobe colour. (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Yellow
4Orange
5Pink/pink-purple
6Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Very few or no visible sign of pigmentation
2Rust-coloured spots
3Presence of pink
Classification
Characterization
Data type
Coded
CodeTermDescription
1Cream
2Yellow
3Orange
4Green
5Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Little or not visible sign of development
2Developed
3Very developed
Classification
Characterization
Data type
Coded
CodeTermDescription
1Translucent white
2Opaque white
3Tinted with yellow
4Tinted with pink
Classification
Characterization
Data type
Coded
CodeTermDescription
1Rectangular
2Oval
3Rounded
4Fan-shaped
Classification
Characterization
Data type
Coded
CodeTermDescription
1Simple folding under apex
2More or less smooth
3Several folding under apexCorrugated
Classification
Characterization
Data type
Coded
CodeTermDescription
1Little or no visible sign of development
2Developed
3Very developed
Classification
Characterization
Data type
Coded
CodeTermDescription
1Thread-like
2Triangular
3Obtuse

In relation to the base of the lobes on the compound tepal

Classification
Characterization
Data type
Coded
CodeTermDescription
1Exserted
2Same level
3Inserted
Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Yellow

Observed on the face opposite to the dehiscence split of the anther (dorsal face). (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Yellow
4Grey
5Brown/rusty brown
6Pink/pink-purple
7BlackAnthers aborted
8Other

Recorded at the line where the anther splits to release pollen. (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Yellow
4Brown/rusty brown
5Pink/pink-purple
6Red-purple
7Other

Percentage of deformed and/or aborted grains in relation to normal grains. Use Alexander’s pollen viability assessment method (See references)

Classification
Characterization
Data type
Free text

Do not refer to the minute blotches which can be present on the style (Descriptor 6.6.17). (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Red-purple
4Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Without pigmentation
2Purple

In relation to the base of the lobes on the compound tepal

Classification
Characterization
Data type
Coded
CodeTermDescription
1Exserted
2Same level
3Inserted
Classification
Characterization
Data type
Coded
CodeTermDescription
1Straight
2Curved under stigma
3Curved at the base
4Curved twice
5Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Cream
2Yellow
3Pink/pink-purple
4Bright yellow
5Orange
6Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Straight
2Arched
Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Yellow
4Green
5Other
Classification
Characterization
Data type
Coded
CodeTermDescription
1Very few or no visible sign of pigmentation
2With red-purple
Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Yellow
4Pink/pink-purple
5Red-purple
6Other

Record number of flowers per cluster with an abnormal number of stamens, fusion of free and compound tepal, etc.

Classification
Characterization
Data type
Free text

Observed soon after flowering and before the fruit fills. Observe a cross-section of a fruit. (See Fig. 18)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Two rowed
2Four-rowed (more or less

For the following descriptors, records should be made on the inner fruit in the middle of the mid-hand of the bunch, at harvest time (first fruit ripening on bunch) / Recorded only on fruits arranged symmetrically around the stalk

Classification
Characterization
Data type
Coded
CodeTermDescription
1Curved towards stalk
2Parallel to the stalk
3Curved upwardObliquely, at a 45°angle upward
4Perpendicular to the stalk
5Pendant

Observed on the mid-hand of the bunch

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

Measured as the internal arc of the fruit, without pedicel

Classification
Characterization
Data type
Coded
CodeTermDescription
1≤15 cm
216- 20 cm
321- 25 cm
426- 30 cm
5≥31 cm
Classification
Characterization
Data type
Coded
CodeTermDescription
1StraightOr slightly curved
2Straight in the distal part
3CurvedSharp curve
4Curved in ‘S’ shapeDouble curvature
5OtherSpecify in descriptor Notes, 6.8

Observed on mature fruit (‘ready to eat’ - ripe but not over-ripe, full yellow stage). (See Fig. 20

Classification
Characterization
Data type
Coded
CodeTermDescription
1Pronounced ridges
2Slightly ridged
3Rounded

Observed at the distal end of the fruit. (See Fig. 21)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Pointed
2Lengthily pointed
3Blunt-tipped
4Bottle-necked
5Rounded

Observed at the distal end of the fruit. (See Fig. 22)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Without any floral relicts
2Persistent style
3Base of the style prominent
Classification
Characterization
Data type
Coded
CodeTermDescription
1≤10 mm
211 to 20 mm
3≥21 mm
Classification
Characterization
Data type
Coded
CodeTermDescription
1<5 mm
25 to 10 mm
3>10 mm
Classification
Characterization
Data type
Coded
CodeTermDescription
1Hairless
2Hairy

(Before joining the crown)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Very partially or no visible sign of fusion
2Partially fused
3Totally fused

Recorded on the youngest hand of the bunch, before maturity. (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Yellow
2Light green
3Green
4Green and pink, red or purple
5Silvery
6Dark green
7Brown/rusty brown
8Pink, red or purple
9Black
10Other

Recorded at fruit maturity (ripe, but not over-ripe; full yellow stage). (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Yellow
2Bright yellow
3Orange
4Grey spots
5Brown/rusty-brown
6Orange red, red or pink/pink purple
7Red-purple
8Black
9Other

Recorded at fruit maturity (‘ready to eat’ ripe, but not over-ripe; full yellow stage)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Two or less
2Three or more

Recorded at fruit maturity (ripe, but not over-ripe; full yellow stage). (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1Fruit peels easily
2Fruit does not peel easily

Recorded at fruit maturity if the peel splits without mechanical damage

Classification
Characterization
Data type
Coded
CodeTermDescription
1Without cracks
2Cracked
Classification
Characterization
Data type
Coded
CodeTermDescription
1Without pulp
2With Pulp

Recorded on youngest hand of the bunch. (Chart B)

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Ivory
4Yellow
5Orange
6Beige-pink
7Other

(Chart B). (Ripe, but not over-ripe; full yellow stage)

Classification
Characterization
Data type
Coded
CodeTermDescription
1White
2Cream
3Ivory
4Yellow
5Orange
6Beige-pink
7Other

Observed at fruit maturity

Classification
Characterization
Data type
Coded
CodeTermDescription
1Persistent
2Deciduous
Classification
Characterization
Data type
Coded
CodeTermDescription
1Firm
2Soft
Classification
Characterization
Data type
Coded
CodeTermDescription
1AstringentLike cooking banana
2Mild, slightly tasty or tasteless
3SweetLike Cavendish
4SugaryLike ‘Pisang Mas’
5Sweet and acidicApple like
6Other

Record the number of seeds only if there exists in the vicinity of the plant a population of wild relatives, or male fertile hybrids (pollen sources), or if the female flowers are artificially pollinated

Classification
Characterization
Data type
Coded
CodeTermDescription
1<5
25-20
3>20
Classification
Characterization
Data type
Coded
CodeTermDescription
1Smooth
2Wrinkled
Classification
Characterization
Data type
Coded
CodeTermDescription
1Flat
2AngularMore or less pyramidal
3GlobularSpherical
4RoundedBut not completely spherical
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