In vitro tuberization in white yam (Dioscorea rotundata Poir) |
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Authors: | Ng Shou Yong Choy |
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Institution: | (1) International Institute of Tropical Agriculture, P.M.B. 5320, Ibadan, Nigeria |
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Abstract: | Nodal cuttings of white yam were induced to produce microtubers on a MS-revised medium supplemented with various concentrations of sucrose, 20 mgl–1 L-cysteine, 0.5 mgl–1 kinetin and 0.7% agar. The frequency of tuberization was affected by the daylength, which is optimal at 12 and 16 h of light depending on the sucrose concentration. The microtubers were planted in a seed bed and grown to maturity. The importance of in vitro tuberization of yam as a means of international germplasm distribution or exchange as well as for the propagation of planting material is discussed. |
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Keywords: | Dioscorea rotundata yam sucrose germplasm exchange propagation in vitro tuberization |
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