The domestication of wild yams is still common practice in West Africa.

It also offers one of the few remaining opportunities to understand how

farmers use their empirical knowledge to tap the genetic resources

of wild plants and create products suitable for agriculture.

Yam agronomists and breeders have, until recently, focused little

attention on this process of organizing and generating agrobiodiversity.

This book aims to fill the gap by pooling existing knowledge on the

subject. This original field offers a wealth of prospects for scientific

progress at a time when scientists are becoming increasingly aware

of the fact that local farmers' knowledge and practices relating to genetic

resource management substantially enhances the potential for technical

progress and adaptation to environmental change.

The focus is deliberately only on domestication leading to Dioscorea

rotundata yams, the type most widely cultivated in West Africa. Several

chapters are devoted to the biodiversity of Dioscorea rotundata yams

and the wild forms from which they derive.

The authors conclude by putting forward hypotheses to explain

the phenotype transformations induced by domestication practices

and their maintenance by vegetative propagation. Further research,

especially by geneticists, is needed to confirm these hypotheses.

Some are already being assessed, using the most advanced molecular

marker analysis techniques, by joint teams of scientists from developed

and developing countries.