Somatic Embryogenesis, Plantlet Regeneration and Micropropagation of Cultivars and F1 Hybrids of Manihot esculenta

摘要

Explants of four F1 hybrids (OMR 36-41/1, OMR 36-41/2, OMR 36-41/4 and OMR 36-41/5) and two cultivars (Rayong 1 and Rayong 60) of cassava (Manihot esculenta Crantz) were subjected to different combinations of 2,4-dichlorophenoxyacetic acid (2,4-D), 1-naphthaleneacetic acid (NAA), kinetin (KIN) and N6-benzylaminopurine (BAP) to induce somatic embryogenesis, organogenesis and micropropagation. Shoot apices of the F1 hybrids exhibited higher frequency (62 – 74 %) of proliferation of somatic embryos than the cultivars (21 – 43 %) in Murashige and Skoog basal medium supplemented with 8 mg dm−3 2,4-D and 0.5 mg dm−3 NAA. Nodal explants of regenerated plantlets were rapidly micropropagated with 90 % efficiency on a medium containing 0.1 mg dm−3 NAA and 0.05 mg dm−3 BAP irrespective of explant source.