Subject: Yam

Yam Agronomy

Adaptation of yam (Dioscorea spp.) cultivation to changing environment and economic constraints in Benin, West Africa
P. Vernier and A.R. Dossou
352

Yam Physiology

Biorhythms in apcial dominance of stored white Guinea yam (Dioscorea rotundata Poir) tubers: endogenous variations in macro- and micronutrient levels as empirical evidence
C.E. Gyansa-Easmon and N.M. Alvarez
359

Yam Agronomy

Participatory assessment and farmers' knowledge on yam varieties (D. rotundata) in Benin
P. Vernier and A. Dansi
360

Growth enhancement of in vitro yam (Dioscorea alata) plantlets under photoautotrophic condition using a forced ventilation system
Quynh Thi Nguyen, Hung Tan Le, Du Xuan Thai and Toyoki Kozai
366

The yam nematode (Scutellonema bradys) in West Africa and the potential for its control through resistance
C. Kwoseh, R. Plowright, R. Asiedu, J. Bridge and S. Gowen
368

Growth and bearing of nematode-infested yellow yam dipped in household disinfestants
Dave G. Hutton
369

Seed yam production through the yam minisett technique; recent modifications to enhance farmers' adoption
John E.G. Ikeorgu, H.N. Nwokocha and M.C. Ikewelle
372

Nutrient deficiencies in greater yam (Dioscorea alata) and their effects on leaf nutrient concentrations
Jane N. O'Sullivan, Rachel Jenner and David G. Edwards
376

Polyploidy in greater yam in relation to hybridization and genetic improvement
K. Abraham, S.G. Nair, M.T. Sreekumari, S. Edison and M. Unnikrishnan
380

Yam Breeding and Postharvest

Genetic diversity of landraces of Dioscorea alata L. collected from Nuku District of Papua New Guinea
Hidekazu Toyohara, Kenji Irie, Masaki Takahashi, Takao Myouda, Kaihei Koshio, Fumio Kikuchi and Hiroshi Fujimaki
385

Edible yam (Dioscorea spp.) improvement: a working model
C.E. Gyansa-Easmon
389

Unusual growth of embryoless seed portion of giant elephant foot yam (Amorphophallus titanum Becc.) after treatment with BAP hormone
M.S. Prana
390

Yam Poster Session

Causes of cracking and deformation in tubers of Dioscorea opposita Thumb
Tatsuo Sato
393

The South Pacific yam network (SPYN)
Vincent Lebot
393

Effects of yam Dioscorea cayenensis-rotundata postharvest treatments on yam chip quality
F. Dumaine, D. Dufour, C. Mestres, J.M. Meot, C. Bada and J. Hounhouigan
394

Viruses infecting Dioscorea yams in the South Pacific islands
Lawrence Kenyon, Benedicte Lebas, Susan Seal and Vincent Lebot
395

Native yam (Dioscorea sp.) starches as a functional ingredient in food products
N.G. Amani, D. Dufour, C. Mestres and A. Kamenan
398