e360 digest


16 Sep 2010: Scientists Collect Yam Samples
to Preserve Critical African Crop

Crop scientists are attempting to collect and catalog more than 3,000 yam samples for international gene banks to preserve the biodiversity of a food crop that is consumed daily by more than 60 million people in Africa alone. Yam varieties collected in West and Central Africa will be sent to the International Institute for Tropical Agriculture in Nigeria, where the samples will be frozen in liquid nitrogen for long-term storage. While many crops can be conserved by drying the seeds, yams must be conserved as vegetative material in tissue culture. A large percentage of important yam varieties are currently preserved only in fields, where they are threatened by disease, pests, natural disaster, and civil conflicts. The nations in Africa’s so-called “yam belt” — including Nigeria, Côte d’Ivoire, Ghana, and Togo — produce more than 90 percent of the world’s yams. “This opportunity to protect an incredibly wide variety of yams allows us to feel more reassured that the unique diversity of yam will be safely secured and available to future generations,” said Alexandre Dansi, a researcher at the University of Abomey-Calavi in Benin who has helped catalog about 250 discrete types of yams and more than 1,000 yam varieties.


Yale
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
.

SEARCH e360



Donate to Yale Environment 360
Yale Environment 360 Newsletter


CONNECT


ABOUT

About e360
Contact
Submission Guidelines
Reprints

E360 en Español

Universia partnership
Yale Environment 360 articles are now available in Spanish and Portuguese on Universia, the online educational network.
Visit the site.


DEPARTMENTS

Opinion
Reports
Analysis
Interviews
Forums
e360 Digest
Podcasts
Video Reports

TOPICS

Biodiversity
Business & Innovation
Climate
Energy
Forests
Oceans
Policy & Politics
Pollution & Health
Science & Technology
Sustainability
Urbanization
Water

REGIONS

Antarctica and the Arctic
Africa
Asia
Australia
Central & South America
Europe
Middle East
North America

e360 VIDEO

“video
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land.
Watch the video.

e360 MOBILE

Mobile
The latest
from Yale
Environment 360
is now available for mobile devices at e360.yale.edu/mobile.

e360 PHOTO ESSAY

“Alaska
An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S.
View the photos.

e360 VIDEO

“Ugandan
Ugandan scientists monitor the impact of climate change on one of Africa’s most diverse forests and its extraordinary wildlife.
Learn more.

e360 VIDEO

Food waste
An e360 video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs.
Watch the video.

e360 VIDEO

Colorado wildfires
An e360 video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate.
Watch the video.

e360 SPECIAL REPORT

“Tainted
A three-part series Tainted Harvest looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup.
Read the series.

OF INTEREST



Yale