G9 banana (tissue culture, Cavendish)

Grand Naine 'G9' is a high-yielding Cavendish (AAA genome group) banana selection that was introduced to India from Israel and has become the dominant commercial dessert banana variety in the country. Tissue-cultured planting material is the standard mode of multiplication, providing uniform, true-to-type and pathogen-indexed plants.

Key characteristics

Genome group: Cavendish (AAA), Grand Naine selection
Plant height: 6.5-7.5 ft
Duration: 11-12 months from planting to harvest
Bunch weight: 30-55 kg under good management
Recommended spacing: 6 x 6 ft (around 1,200 plants/acre); closer 5.5 x 5.5 ft spacings are also used in delta and tank-fed regions

Cultivation

G9 tissue-culture plants are hardened in shade-net nurseries before field planting, typically into pits or trenches with farmyard manure. Drip fertigation is the norm in commercial plantings. Because the variety is shallow-rooted and bears heavy bunches, propping at bunch emergence with bamboo or casuarina poles is essential to prevent lodging (Banana Staking Bamboo). In-field recycling of pseudostem and leaf residue is widely promoted to return potassium and organic matter to the soil (Banana Residue Mulching).

Pest and disease profile

The variety is susceptible to Sigatoka leaf spots and to banana bunchy top virus; it shows moderate field tolerance to Fusarium wilt race 1 but is vulnerable to Tropical Race 4 where the pathogen is present. Use of tissue-cultured, indexed planting material reduces incidence of viral diseases compared with sucker-based crops.

Adoption and use

G9 is the backbone of organised banana cultivation in Maharashtra, Tamil Nadu, Andhra Pradesh, Gujarat and Karnataka, supplying both domestic table-fruit markets and export channels. Most growers harvest a plant crop plus one ratoon before re-planting.

References

Grand Nain (G9) Banana Farming in India. Agrifarming.
G9 Tissue Culture Banana Cultivation. Agrifarming.