Descriptors for banana (Musa spp.)
(IPGRI), I. P. G. R. I. (1984). Descriptors for Banana (Musa spp.). Bioversity International: research for development in agricultural and tree biodiversity.
Code | Term | Description |
---|---|---|
1 | Erect | |
2 | Intermediate | |
3 | Drooping | |
4 | Others |
Code | Term | Description |
---|---|---|
1 | Normal: leaves not overlapped and leaf ratio inferior to 2.5 | |
2 | Dwarf type: leaves strongly overlapped and leaf ratio superior to 2.5 |
Recorded from the base of pseudostem to emerging point of the peduncle
Code | Term | Description |
---|---|---|
1 | ≤2 | |
2 | 2.1 to 2.9 | |
3 | ≥3 |
Determined by the circumference at 100 cm
Code | Term | Description |
---|---|---|
1 | Slender | |
2 | Normal | |
3 | Robust |
Recorded without removing the external sheaths. The colour of oldest dry sheaths should not be considered. (Chart A)
Code | Term | Description |
---|---|---|
1 | Green-yellow | |
2 | Medium green | |
3 | Green | |
4 | Dark green | |
5 | Green-red | |
6 | Red | |
7 | Red-purple | |
8 | Blue | |
9 | Chimerical | |
10 | Other |
Recorded as in 6.2.3
Code | Term | Description |
---|---|---|
1 | Dull | Waxy |
2 | Shiny | Not 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)
Code | Term | Description |
---|---|---|
1 | Watery green | |
2 | Light green | |
3 | Green | |
4 | Cream | |
5 | Pink-purple | |
6 | Red-purple | |
7 | Purple | |
8 | Others |
Record the tinge of pigmentation, even if it is only noticeable in places. (Chart A)
Code | Term | Description |
---|---|---|
1 | Pink-purple | |
2 | Red | |
3 | Purple | |
4 | Others |
Cut the external sheath of pseudostem and record the characteristics of the sap. (Chart A)
Code | Term | Description |
---|---|---|
1 | Watery | |
2 | Milky | |
3 | Red-purple | |
4 | Others |
Code | Term | Description |
---|---|---|
1 | Very little or no visible sign of wax | |
2 | Very few wax | |
3 | Moderately waxy | |
4 | Very 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
In relation to the parent plant. Observed on the tallest sucker. Recorded at harvest time
Code | Term | Description |
---|---|---|
1 | Taller than parent plant | |
2 | More than 3/4 of the height of the parent plant | |
3 | Between 1/4 and 3/4 of the height of the parent plant | |
4 | Inhibited |
Code | Term | Description |
---|---|---|
1 | Far from parent plant | Emerging >50 cm from parent plant |
2 | Close to parent | Vertical growth |
3 | Close to parent | Growing at an angle |
Recorded on the third, fully unfolded leaf counting down from the top of the plant. (See Fig. 5)
Code | Term | Description |
---|---|---|
1 | Sparse blotching | |
2 | Small blotches | |
3 | Large blotches | |
4 | Extensive pigmentation | |
5 | Without pigmentation |
Recorded on the third, fully unfolded leaf counting down from the top of the plant. (See Fig. 5)
Code | Term | Description |
---|---|---|
1 | Brown | |
2 | Dark brown | |
3 | Brown-black | |
4 | Black-purple | |
5 | Other | Specify 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)
Code | Term | Description |
---|---|---|
1 | Open with margins spreading | |
2 | Wide with erect margins | |
3 | Straight with erect margins | |
4 | Margins curved inward | |
5 | Margins overlapping |
Code | Term | Description |
---|---|---|
1 | Winged and undulating | |
2 | Winged and not clasping the pseudostem | |
3 | Winged and clasping the pseudostem | |
4 | Not winged and clasping the pseudostem | |
5 | Not winged and not clasping the pseudostem |
Code | Term | Description |
---|---|---|
1 | Dry | |
2 | Not dry |
Code | Term | Description |
---|---|---|
1 | Green | |
2 | Pink-purple to red | |
3 | Purple to blue | |
4 | Other | Specify in descriptor Notes, 6.8 |
Code | Term | Description |
---|---|---|
1 | Colourless | Without a colour line along |
2 | With a colour line along |
Code | Term | Description |
---|---|---|
1 | ≤1 cm | |
2 | >1 cm | |
3 | Cannot be defined |
Measured at its maximum point
Code | Term | Description |
---|---|---|
1 | ≤170 cm | |
2 | 171 to 220 cm | |
3 | 221 to 260 cm | |
4 | ≥261 cm |
Measured at its maximum point
Code | Term | Description |
---|---|---|
1 | ≤70 cm | |
2 | 71 to 80 cm | |
3 | 81 to 90 cm | |
4 | ≥91 cm |
Legend:
≤2
2.4 to 2.6
≥3
Recorded from the pseudostem to the lamina
Code | Term | Description |
---|---|---|
1 | ≤50 cm | |
2 | 51 to 70 cm | |
3 | ≥71 cm |
Code | Term | Description |
---|---|---|
1 | Green-yellow | |
2 | Medium green | |
3 | Green | |
4 | Dark green | |
5 | Dark green with red-purple | Presence of large blotches of red-purple |
6 | Blue | |
7 | Other | Specify in descriptor Notes, 6.8 |
Code | Term | Description |
---|---|---|
1 | Dull | |
2 | Shiny |
(Wax removed). (Chart A)
Code | Term | Description |
---|---|---|
1 | Green-yellow | |
2 | Medium green | |
3 | Green | |
4 | Dark green | |
5 | Blue | |
6 | Red-purple | |
7 | Others |
Code | Term | Description |
---|---|---|
1 | Dull | |
2 | Shiny |
Recorded on the lower surface
Code | Term | Description |
---|---|---|
1 | Very little or no visible sign of wax | |
2 | Few wax | |
3 | Moderately waxy | |
4 | Very waxy |
Code | Term | Description |
---|---|---|
1 | Symmetric | |
2 | Asymmetric |
Code | Term | Description |
---|---|---|
1 | Both sides rounded | |
2 | One side rounded, one pointed | |
3 | Both sides pointed |
Presence of ridges perpendicular to the secondary ribs on the leaf upper surface
Code | Term | Description |
---|---|---|
1 | Even, smooth | |
2 | Few stripes | |
3 | Very corrugated |
If pigmentation is seen, options are 4, 5 or 6. (Chart A)
Code | Term | Description |
---|---|---|
1 | Yellow | |
2 | Light green | |
3 | Green | |
4 | Pink-purple | |
5 | Red-purple | |
6 | Purple to blue | |
7 | Others |
If pigmentation is seen, options are 4, 5 or 6. (Chart A)
Code | Term | Description |
---|---|---|
1 | Yellow | |
2 | Light green | |
3 | Green | |
4 | Pink-purple | |
5 | Red-purple | |
6 | Purple to blue | |
7 | Others |
Look at the visible face (future lower face) of the cigar leaf before it is unfurled and before the plant flowers. (Chart A)
Code | Term | Description |
---|---|---|
1 | Green | |
2 | Red-purple | |
3 | Others |
Observed on young, non inhibited water suckers (if the lamina is sword shaped, it is not a water sucker)
Code | Term | Description |
---|---|---|
1 | Without blotches | |
2 | Little or narrow blotches | |
3 | Large purple blotches |
Measured from the leaf crown to the first hand of fruit
Code | Term | Description |
---|---|---|
1 | ≤30 cm | |
2 | 31 - 60 cm | |
3 | ≥61 cm |
Record the number of empty nodes between the last bract-leaf and first hand of fruit
Recorded at mid-length
Code | Term | Description |
---|---|---|
1 | ≤6 cm | |
2 | 7 - 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)
Code | Term | Description |
---|---|---|
1 | Light green | |
2 | Green | |
3 | Dark green | |
4 | Red or pink/purple | |
5 | With purple-brown to blue blotches | |
6 | Other |
Code | Term | Description |
---|---|---|
1 | Hairless | |
2 | Slightly hairy | |
3 | Very hairy, short hairs | Similar to velvet touch |
4 | Very hairy, long hairs | >2 mm |
(Position of the fruit-bearing part). Angle from vertical to the general axis of the bunch
Code | Term | Description |
---|---|---|
1 | Hanging vertically | |
2 | Slightly angled | |
3 | Hanging at angle 45° | |
4 | Horizontal | |
5 | Erect |
Code | Term | Description |
---|---|---|
1 | Cylindrical | |
2 | Truncated cone shape | |
3 | Asymmetric - Bunch axis is nearly straight | |
4 | With a curve in the bunch axis | |
5 | Spiral | All fruit is attached to a unique crown coiled around the stalk |
Code | Term | Description |
---|---|---|
1 | Lax: | One can easily place one’s hand between the hands of fruit |
2 | Compact: | One can place one’s finger, but not one’s hand, between the hands of fruit |
3 | Very 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
Code | Term | Description |
---|---|---|
1 | Female (absence of pollen sacs or pollens | |
2 | Hermaphrodite | Presence of pollen sacs and pollens |
Positioning of fruits on the crown
Code | Term | Description |
---|---|---|
1 | Uniseriate | |
2 | Biseriate | |
3 | Biseriate and fused |
For the following descriptors, observe only that part of the rachis between the last hand of fruit and the male bud
Code | Term | Description |
---|---|---|
1 | Truncated, no bract scar below the last hand of fruit | |
2 | Present 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
Code | Term | Description |
---|---|---|
1 | Falling vertically | |
2 | At an angle | |
3 | With a curve | |
4 | Horizontal | |
5 | Erect |
Code | Term | Description |
---|---|---|
1 | Bare | |
2 | Neutral flowers | One to few hands only, stalk is bare below |
3 | Male flowers/bracts above the male bud | But the stalk is bare above flowers/bracts |
4 | Neutral/male flowers and presence of withered bracts | On the whole stalk |
5 | Neutral/male flowers on the whole stalk without persistent bracts | E.g. AA var. ‘Tuu Gia’ |
6 | Small bunch from neutral/hermaphrodite flowers just above the male bud | E.g. ABB var. ‘Monthan’ |
7 | Other |
Recorded at maturity
Code | Term | Description |
---|---|---|
1 | Normal | Present |
2 | Degenerating before maturity | Like false-horn ‘Plantain’ |
3 | Like true-horn ‘Plantain’ | Absent |
Note the general shape of the male bud at harvest. (See Fig. 9)
Code | Term | Description |
---|---|---|
1 | Like a top | |
2 | Lanceolate | |
3 | Intermediate | |
4 | Ovoid | |
5 | Rounded |
Length and maximum diameter of male bud at harvest
Code | Term | Description |
---|---|---|
1 | ≤20 cm | |
2 | 21 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
Code | Term | Description |
---|---|---|
1 | Small shoulder | |
2 | Medium | |
3 | Large shoulder |
Flatten the apex of the bract to observe its shape. (See Fig. 11)
Code | Term | Description |
---|---|---|
1 | Pointed | |
2 | Slightly pointed | |
3 | Intermediate | |
4 | Obtuse | |
5 | Obtuse and split |
Note alignment of bracts at the apex of the male bud
Code | Term | Description |
---|---|---|
1 | Old bracts overlap at apex of bud | Like Musa acuminata subsp. malaccensis |
2 | Young bracts slightly overlap | |
3 | Young bracts greatly overlap | Like Musa acuminata subsp. burmanicca |
Code | Term | Description |
---|---|---|
1 | Yellow | |
2 | Green | |
3 | Red | |
4 | Red-purple | |
5 | Purple-brown | |
6 | Purple | |
7 | Blue | |
8 | Pink-purple | |
9 | Orange-red | |
10 | Other |
Code | Term | Description |
---|---|---|
1 | Whitish | |
2 | Yellow or green | |
3 | Orange red | |
4 | Red | |
5 | Purple | |
6 | Purple brown | |
7 | Pink-purple | |
8 | Other |
Recorded on the external face of the bract
Code | Term | Description |
---|---|---|
1 | Tinted with yellow | Discoloured |
2 | Not tinted with yellow | Colour is uniform until apex |
Code | Term | Description |
---|---|---|
1 | Without discoloured lines (not ridges) on the external face | |
2 | With discoloured lines or stripes on the external face |
Recorded on scars left after fall of bracts and flowers
Code | Term | Description |
---|---|---|
1 | Very prominent | |
2 | Not prominent |
Observed on the inside of the bract
Code | Term | Description |
---|---|---|
1 | Colour discontinuing towards the base | Loss of pigmentation at the base |
2 | Colour homogenous | Pigmentation is uniform and continues until the base |
Code | Term | Description |
---|---|---|
1 | X/y < 0.28 | Lanceolate |
2 | 0.28 < x/y <0.30 | |
3 | X/y > 0.30 | Ovate |
Number of raised bracts present on the male bud
Code | Term | Description |
---|---|---|
1 | Not lifting from male bud | Bracts are persistent |
2 | Lifting one at a time | |
3 | Lifting two or more at a time |
Code | Term | Description |
---|---|---|
1 | Revolute | Rolling |
2 | Not revolute | Not rolling |
Recorded on the external surface
Code | Term | Description |
---|---|---|
1 | Very little or no visible sign of wax | |
2 | Very few wax | |
3 | Moderately waxy | |
4 | Very waxy |
Observed on the external surface
Code | Term | Description |
---|---|---|
1 | Few grooves or not grooved | The bract is completely, or almost completely, smooth |
2 | Moderate grooving | Parallel ridges are distinguishable |
3 | Strongly grooved | Deep 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
Code | Term | Description |
---|---|---|
1 | Falling before the bract | |
2 | Falling with the bract | |
3 | Falling after the bract | |
4 | Neutral/male flowers persistent |
Without considering lobe colour. (Chart B)
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Yellow | |
4 | Orange | |
5 | Pink/pink-purple | |
6 | Other |
Code | Term | Description |
---|---|---|
1 | Very few or no visible sign of pigmentation | |
2 | Rust-coloured spots | |
3 | Presence of pink |
Code | Term | Description |
---|---|---|
1 | Cream | |
2 | Yellow | |
3 | Orange | |
4 | Green | |
5 | Other |
Code | Term | Description |
---|---|---|
1 | Little or not visible sign of development | |
2 | Developed | |
3 | Very developed |
Code | Term | Description |
---|---|---|
1 | Translucent white | |
2 | Opaque white | |
3 | Tinted with yellow | |
4 | Tinted with pink |
Code | Term | Description |
---|---|---|
1 | Rectangular | |
2 | Oval | |
3 | Rounded | |
4 | Fan-shaped |
Code | Term | Description |
---|---|---|
1 | Simple folding under apex | |
2 | More or less smooth | |
3 | Several folding under apex | Corrugated |
Code | Term | Description |
---|---|---|
1 | Little or no visible sign of development | |
2 | Developed | |
3 | Very developed |
Code | Term | Description |
---|---|---|
1 | Thread-like | |
2 | Triangular | |
3 | Obtuse |
In relation to the base of the lobes on the compound tepal
Code | Term | Description |
---|---|---|
1 | Exserted | |
2 | Same level | |
3 | Inserted |
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Yellow |
Observed on the face opposite to the dehiscence split of the anther (dorsal face). (Chart B)
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Yellow | |
4 | Grey | |
5 | Brown/rusty brown | |
6 | Pink/pink-purple | |
7 | Black | Anthers aborted |
8 | Other |
Recorded at the line where the anther splits to release pollen. (Chart B)
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Yellow | |
4 | Brown/rusty brown | |
5 | Pink/pink-purple | |
6 | Red-purple | |
7 | Other |
Percentage of deformed and/or aborted grains in relation to normal grains. Use Alexander’s pollen viability assessment method (See references)
Do not refer to the minute blotches which can be present on the style (Descriptor 6.6.17). (Chart B)
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Red-purple | |
4 | Other |
Code | Term | Description |
---|---|---|
1 | Without pigmentation | |
2 | Purple |
In relation to the base of the lobes on the compound tepal
Code | Term | Description |
---|---|---|
1 | Exserted | |
2 | Same level | |
3 | Inserted |
Code | Term | Description |
---|---|---|
1 | Straight | |
2 | Curved under stigma | |
3 | Curved at the base | |
4 | Curved twice | |
5 | Other |
Code | Term | Description |
---|---|---|
1 | Cream | |
2 | Yellow | |
3 | Pink/pink-purple | |
4 | Bright yellow | |
5 | Orange | |
6 | Other |
Code | Term | Description |
---|---|---|
1 | Straight | |
2 | Arched |
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Yellow | |
4 | Green | |
5 | Other |
Code | Term | Description |
---|---|---|
1 | Very few or no visible sign of pigmentation | |
2 | With red-purple |
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Yellow | |
4 | Pink/pink-purple | |
5 | Red-purple | |
6 | Other |
Record number of flowers per cluster with an abnormal number of stamens, fusion of free and compound tepal, etc.
Observed soon after flowering and before the fruit fills. Observe a cross-section of a fruit. (See Fig. 18)
Code | Term | Description |
---|---|---|
1 | Two rowed | |
2 | Four-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
Code | Term | Description |
---|---|---|
1 | Curved towards stalk | |
2 | Parallel to the stalk | |
3 | Curved upward | Obliquely, at a 45°angle upward |
4 | Perpendicular to the stalk | |
5 | Pendant |
Observed on the mid-hand of the bunch
Code | Term | Description |
---|---|---|
1 | ≤12 | |
2 | 13-16 | |
3 | ≥17 |
Measured as the internal arc of the fruit, without pedicel
Code | Term | Description |
---|---|---|
1 | ≤15 cm | |
2 | 16- 20 cm | |
3 | 21- 25 cm | |
4 | 26- 30 cm | |
5 | ≥31 cm |
Code | Term | Description |
---|---|---|
1 | Straight | Or slightly curved |
2 | Straight in the distal part | |
3 | Curved | Sharp curve |
4 | Curved in ‘S’ shape | Double curvature |
5 | Other | Specify in descriptor Notes, 6.8 |
Observed on mature fruit (‘ready to eat’ - ripe but not over-ripe, full yellow stage). (See Fig. 20
Code | Term | Description |
---|---|---|
1 | Pronounced ridges | |
2 | Slightly ridged | |
3 | Rounded |
Observed at the distal end of the fruit. (See Fig. 21)
Code | Term | Description |
---|---|---|
1 | Pointed | |
2 | Lengthily pointed | |
3 | Blunt-tipped | |
4 | Bottle-necked | |
5 | Rounded |
Observed at the distal end of the fruit. (See Fig. 22)
Code | Term | Description |
---|---|---|
1 | Without any floral relicts | |
2 | Persistent style | |
3 | Base of the style prominent |
Code | Term | Description |
---|---|---|
1 | ≤10 mm | |
2 | 11 to 20 mm | |
3 | ≥21 mm |
Code | Term | Description |
---|---|---|
1 | <5 mm | |
2 | 5 to 10 mm | |
3 | >10 mm |
Code | Term | Description |
---|---|---|
1 | Hairless | |
2 | Hairy |
(Before joining the crown)
Code | Term | Description |
---|---|---|
1 | Very partially or no visible sign of fusion | |
2 | Partially fused | |
3 | Totally fused |
Recorded on the youngest hand of the bunch, before maturity. (Chart B)
Code | Term | Description |
---|---|---|
1 | Yellow | |
2 | Light green | |
3 | Green | |
4 | Green and pink, red or purple | |
5 | Silvery | |
6 | Dark green | |
7 | Brown/rusty brown | |
8 | Pink, red or purple | |
9 | Black | |
10 | Other |
Recorded at fruit maturity (ripe, but not over-ripe; full yellow stage). (Chart B)
Code | Term | Description |
---|---|---|
1 | Yellow | |
2 | Bright yellow | |
3 | Orange | |
4 | Grey spots | |
5 | Brown/rusty-brown | |
6 | Orange red, red or pink/pink purple | |
7 | Red-purple | |
8 | Black | |
9 | Other |
Recorded at fruit maturity (‘ready to eat’ ripe, but not over-ripe; full yellow stage)
Code | Term | Description |
---|---|---|
1 | Two or less | |
2 | Three or more |
Recorded at fruit maturity (ripe, but not over-ripe; full yellow stage). (Chart B)
Code | Term | Description |
---|---|---|
1 | Fruit peels easily | |
2 | Fruit does not peel easily |
Recorded at fruit maturity if the peel splits without mechanical damage
Code | Term | Description |
---|---|---|
1 | Without cracks | |
2 | Cracked |
Code | Term | Description |
---|---|---|
1 | Without pulp | |
2 | With Pulp |
Recorded on youngest hand of the bunch. (Chart B)
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Ivory | |
4 | Yellow | |
5 | Orange | |
6 | Beige-pink | |
7 | Other |
(Chart B). (Ripe, but not over-ripe; full yellow stage)
Code | Term | Description |
---|---|---|
1 | White | |
2 | Cream | |
3 | Ivory | |
4 | Yellow | |
5 | Orange | |
6 | Beige-pink | |
7 | Other |
Observed at fruit maturity
Code | Term | Description |
---|---|---|
1 | Persistent | |
2 | Deciduous |
Code | Term | Description |
---|---|---|
1 | Firm | |
2 | Soft |
Code | Term | Description |
---|---|---|
1 | Astringent | Like cooking banana |
2 | Mild, slightly tasty or tasteless | |
3 | Sweet | Like Cavendish |
4 | Sugary | Like ‘Pisang Mas’ |
5 | Sweet and acidic | Apple like |
6 | Other |
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
Code | Term | Description |
---|---|---|
1 | <5 | |
2 | 5-20 | |
3 | >20 |
Code | Term | Description |
---|---|---|
1 | Smooth | |
2 | Wrinkled |
Code | Term | Description |
---|---|---|
1 | Flat | |
2 | Angular | More or less pyramidal |
3 | Globular | Spherical |
4 | Rounded | But not completely spherical |