Biodiversity and Domestication of Yams in West Africa

Traditional Practices Leading to Dioscorea rotundata Poir.

by Philippe Vernier (writer), Alexandre Dansi (writer), Jeanne Zoundjihèkpon (writer), Roland Dumont (writer)
january 2006
eBook [ePub]
[NR] format Download after purchase
11,99 €
eBook [PDF]
[NR] format 104 pages Download after purchase
11,99 €

A study of yam domestication practices among smallholders has provided an insight into how farmers exploit wild plant genetic resources so as to adapt them to agriculture. This book describes the domestication operations leading to Dioscorea rotundata yams in Africa. The biodiversity of these yams and of their wild relatives is investigated, and the authors put forward hypotheses to explain the phenotypic changes resulting from smallholder practices. These hypotheses could be possible lines of research for breeders.

Acknowledgements
Foreword

Introduction

The Dioscorea rotundata Poir. yam

Botanical aspects
Geographical distribution
Botanical origins of Dioscorea rotundata
Organization of diversity in Dioscorea rotundata
. Yam diversity on African farms
. State of the scientific knowledge
  Morphological and physiological diversity
  Genetic diversity
  Chemical diversity
  Cooking quality
  Sexual features
  Cultivation requirements
  Intrinsic productivity of the plant material
  Market adaptation

Wild yams Dioscorea praehensilis Benth and Dioscorea abyssinica Hochst ex Kunth

General
Dioscorea praehensilis
Dioscorea abyssinica

Addendum: Dioscorea togoensis Knuth

Phenomena that could explain the variability of wildand domesticated yams

Climatic disturbance
Anthropogenic pressure
Reciprocal gene flow between wild and cultivated yams
Effects of periodic fallows
Variations in genome expression
Mutation
Ploidization

Domestication leading to Dioscorea rotundata

Definitions and general aspects
Rationales and limits of domestication
. Significance and importance of domestication for farmers
. Framework of domestication

Cultivation techniques used to transform wild yams into double-harvest Dioscorea rotundata yams

General
Domestication process and effects
Thoughts on domestication leading to double-harvest Dioscorea rotundata yams

Conclusion

Glossary of technical terms

References

Invasions biologiques et extinctions 11 000 Years of the History of Vertebrates in France

Hardback book 34,50 €

Olivier Lorvelec, Jean-Denis Vigne, Michel Pascal

La question des échelles en sciences humaines et sociales Quelles pratiques de terrain pour quelles données au Sud ?

Book 36,00 €

Agroforesterie et services écosystémiques en zone tropicale Recherche de compromis entre services d’approvisionnement et autres services écosystémiques

eBook 0,00 € (free)

Agrarian systems and climate change in the South Pathways to adaptation

Book 39,00 €

Farmland faced with urbanisation From data to action, what part can information play?

eBook 0,00 € (free)

Into the woods Overlapping perspectives on the history of ancien forest

eBook 0,00 € (free)

PDO Cheese Strategies in Europe Methods of regulation and economic performance

eBook 0,00 € (free)

Philippe Jeanneaux

Ecosystem services and soil protection Legal analyses and agricultural clarifications

eBook 0,00 € (free)

Language(s): English

Publisher: Cirad, Ipgri

Co-publishers: Irstea, Ifremer, Inra

Edition: 1st edition

Collection: Update Sciences & technologies

Published: 1 january 2006

Reference eBook [ePub]: CI953EPB

Reference eBook [PDF]: CI953NUM

EAN13 eBook [ePub]: 9782759211135

EAN13 eBook [PDF]: 9782759201495

Interior: Two-colour

Pages count eBook [PDF]: 104

Size: 5,3 Mo (ePub), 11 Mo (PDF)

Vidéo