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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

Data on the agronomic performance of NARITA 4 in various field trials.

Traits
Ugandaa[4]
Rwandab[6]
Mean plant height at flowering (cm)
293.0
 
Mean pseudostem girth at flowering (cm)
49.0
 
Mean pseudostem girth at 100 cm height (cm)   50.7±1
Mean time from flowering to harvest (days)
156.9
 
Mean bunch weight (kg)
20.5
16.7±0.8
Mean number of hands
8.3
8.6±0.2
Mean number of fingers
168.6
 
Mean number of fingers/handc   8.7±0.1
Mean fruit circumference (cm)
11.7
 
Mean fruit length (cm)
18.4
 
Mean number of functional leaves at flowering
9.6
 
Mean number of functional leaves at harvest
4.6
 
Mean height of tallest sucker at flowering (cm)
246.6
 
Mean height of tallest sucker at harvest (cm)
298.0
 
Mean youngest leaf spotted at flowering
8.6
 
Mean youngest leaf spotted at harvest
3.5
 
Survival rate (%)
100
 
a Data from 10 plants evaluated over three crop cycles in Namulonge, Central Uganda.
b Data from three sites in Rwanda (15 plants/site). The plants were evaluated over two crop cycles.
c Second lowest hand of the bunch.

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.
6. Ndayitegeye, O., Blomme, G., Ocimati, W., Crichton, R., Ntamwira, J., Muchunguzi, P., Asten, P., Bahati, L. and Gaidashova, S. 2017. Multi-locational evaluation of cooking banana cultivars NARITA 4 hybrid and Mpologoma in Rwanda. African Journal of Agricultural Research 12(41):3068-3071.

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