Abstract
AbstractIn this chapter, the establishment of embryogenic cell suspension (ECS) cultures using immature male flowers of triploid banana (Musa AAA Cavendish subgroup cv. ‘Brazil’), followed by somatic embryogenesis and plantlet regeneration is described. Mutation induction is achieved by exposing the ECS to gamma irradiation with the dose of 80 Gy. The mutagenized cell population is transferred to solid long-term suspension culture medium for 96 h to recover from mutagen treatment shock, followed by somatic embryo induction and development medium containing 20% crude culture filtrates from Fusarium oxysporum f. sp. cubense (Foc). After 90 days, the somatic embryos that survive are transferred to the germination medium containing 25% crude culture filtrates. The surviving mature somatic embryos are transferred to rooting medium after the fourth subculture on the germination medium containing 50% crude culture filtrates. Before transplanting in a Foc infected field, the in vitro plantlets are acclimatized and screened for resistance to Foc using a pot-based greenhouse bioassay.
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