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A total of four sets of seeds (totalling 5526 seeds) were recieved from CIAT during the period 1990-1993. One set (comprising 1100 hybrid seeds) originated from the Thai-CIAT program in Rayong. Evaluation and selection of seedling clones has progressed satisfactorily, and culminated in the releas...


Tan, Swee LianChan, S.K.[Recent progress in cassava varietal improvement and agronomy research in Malaysia]Recent progress in cassava varietal improvement and agronomy research in Malaysia

An attempt was made to introduce potato (Solanum tuberosum L.) in hot arid water scarce zone of Western Rajasthan, India. Eight CIP-bred potato clones were evaluated along with two controls, viz. Kufri Pukhraj and Kufri Surya on farmer’s field at Jodhpur, Rajasthan under normal and moderate water...


Arya, S.Rawal, S.Luthra, S.K.Sharma, N.Gupta, V.K.Kadian, M.S.[Participatory evaluation of advanced potato (Solanum tuberosum) clones for water stress tolerance]Participatory evaluation of advanced potato (Solanum tuberosum) clones for water stress tolerance

Several species of double-stranded RNA (dsRNA) were found to occur in the cassava clone Secundina, which was thought to be virus- free. A large dsRNA molecule (6.6 x 106 Mr = relative molecular mass)(L-dsRNA) was shown to be graft, but not mechanically transmitted and occurred primarily in a nucl...


Gabriel, C.J.WALSH, R.Nolt, Barry L.[Evidence for a latent viruslike agent in cassava]Evidence for a latent viruslike agent in cassava

Cassava improvement research at the International Institute of Tropical Agriculture (I1TA) developed several new varieties during 1976-1985 that entered into the cassava culture of Oyo State of Nigeria where IITA is situated. The focus of this study was to determine the level of overall impact of...


Akoroda, M.O.Gebremeskel, T.Oyinlola, A.[Impact of IITA cassava varieties in Oyo State, Nigeria, 19761985]Impact of IITA cassava varieties in Oyo State, Nigeria, 19761985

The objective of this study was to quantify the effect of photoperiod on the duration from vine (shoot) emergence to flowering in white or Guinea yam (Dioscorea rotundata). The duration from vine emergence to flowering in two clonal varieties of yam (TDr 131 and TDr 99-9) was recorded at 10 diffe...


Ile, E.I.Craufurd, Peter Q.Asiedu, RobertBattey, N.H.[Duration from vine emergence to flowering suggests a longday or rate of change of photoperiod response in white yam (Dioscorea rotundata Poir)]Duration from vine emergence to flowering suggests a longday or rate of change of photoperiod response in white yam (Dioscorea rotundata Poir)

Over the period 1994-1996, seven batches of seeds and two of meristem tissue cultures were evaluated and selected. As important as root yield is the trait starch content (or dry matter content) if a clone is to be accepted as a starch cultivar. At the time of reporting a number of clones have bee...


Tan, Swee Lian[Varietal improvement and agronomy research in Malaysia]Varietal improvement and agronomy research in Malaysia

Ceballos, H.Morante, NelsonCalle, FernandoLenis, Jorge I.Jaramillo, GustavoPérez, Juan Carlos[Cassava genetic improvement]Cassava genetic improvement

Jaramillo O., Gustavo[Manihot genetic resources at CIAT (Centro Internacional de Agricultura Tropical)]Manihot genetic resources at CIAT (Centro Internacional de Agricultura Tropical)

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