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'NARITA 4'


'NARITA 4' at a glance

Image

Left to right: ‘NARITA 4’, its female parent 660-K1 and its female grandparent ‘Enzirabahima’

Ploidy level

3x

Genome group

AAA

Status

Synthetic hybrid

Breeding institutes

NARO and IITA

Breeder's code

9187S-8

Pedigree

‘Enzirabahima’ (AAA), Musa acuminata ssp. burmannica (Calcutta 4), ‘Tjau Lagada’ (AA) and ‘Pisang Lilin’ (AA)’ (AA)

ITC code

ITC1845

'NARITA 4' is a high-yielding and disease-resistant hybrid that is related, through its female grandparent, to a group of cooking and beer bananas called East African highland bananas (EAHB). ‘NARITA 4’ is named after NARO and IITA, the institutes that jointly developed the NARITA hybrids[1].

Two crosses were performed to obtain ‘NARITA 4’. The triploid EAHB cultivar ‘Enzirabahima’ was crossed with a wild source of disease resistance to produce a tetraploid. This tetraploid was then crossed with an improved diploid to produce the triploid hybrid ‘NARITA 4’ (see Breeding strategy below).

‘NARITA 4’ has been tested on station in Uganda[2] and is being evaluated in a broader range of end-users environments (including farmers’ fields), to assess its potential for adoption by farmers and consumers[3]. Its primary use is as a cooking type.

Breeding strategy

Breeding scheme for 'NARITA 4'

‘NARITA 4’ is a secondary triploid obtained by crossing a disease-resistant tetraploid (660-K1) with an improved diploid (9128-3)[4].

The tetraploid female parent 660-K1 was obtained by crossing the triploid EAHB cultivar ‘Enzirabahima’ and Calcutta 4, a genebank accession of the diploid wild species Musa acuminata ssp. burmannica, which provided a copy of the so-called A genome. Calcutta 4 provided the resistance to black leaf streak.

The diploid male parent 9128-3 (whose code used to be preceded by TMBx, for tropical Musa bananas[5]) had been obtained by crossing two diploid cultivars: ‘Tjau Lagada’ and ‘Pisang Lilin’.

Agronomic performance

The following agronomic data were collected during a preliminary yield trial carried out by IITA and NARO at Namulonge in Central Uganda[4]:

Traits
NARITA 4*
Plant height at flowering (cm)
293.0
Pseudostem girth at flowering (cm)
49.0
Time from flowering to harvest (days)
156.9
Bunch weight (kg)
20.5
Number of hands
8.3
Number of fingers
168.6
Fruit circumference (cm)
11.7
Fruit length (cm)
18.4
Number of functional leaves at flowering
9.6
Number of functional leaves at harvest
4.6
Height of tallest sucker at flowering (cm)
246.6
Height of tallest sucker at harvest (cm)
298.0
Youngest leaf spotted at flowering
8.6
Youngest leaf spotted at harvest
3.5
Survival rate (%)
100
* Data are averages for 10 plants evaluated over three crop cycles.

Reaction to diseases and pests

The scores for number of functional leaves and youngest leaf spotted at flowering and harvest indicate good resistance to black leaf streak.

References

1. IITA press release on the first ever high-yielding matooke hybrids.
3. Website of the Breeding Better Bananas project.
4. Tushemereirwe W, Batte M, Nyine M, Tumuhimbise R, Barekye A, Tendo S, Kubiriba J, Lorenzen J and Swennen R. 2015. Performance of NARITA banana hybrids in the preliminary yield trial for three cycles in Uganda.
5. Vuylsteke, D., Ortiz, R. and Ferris, S. 1993. Genetic and agronomic improvement for sustainable production of plantain and banana in sub-saharan Africa. African Crop Science Journal 1(1):1-8.

See also on this website

Musapedia pages on NARITA hybrids:
Musapedia pages on improved materials:

Official website of Uganda's National Agricultural Research Organization, NARO and its banana research program