Environmental Engineering Reference
In-Depth Information
0.38
0.48
0.68
0.87
20 21 19 15 17 14 13 3
8 2 18 1612 11
10 9 7 6 5 22 4 1
Figure 8.1 Relationships between northern yam types cultivated in a PLEC demonstration site
in northern Ghana: Dendogram of 22 accessions of yams based on esterase binding pattern
(
kpuno
and
Zuglanbo
), 9 and 10 (
kan-gbaringa
and
chenchito
), 12 and 14 (
zong
and
liilya
), and 16 and 17 (
dakpani
and
baayeri
), appear to be quite closely related
on the basis of total protein.
Field collection and characterization of yam types
Farmers working on the demonstration site further identified yam types on the
field using the following criteria:
•
nature of vines (staked or cripping)
•
leaf characteristics
•
tuber characteristics.
Farmers also differentiated wild yam from those domesticated by the direction
(clockwise or anti-clockwise) of circummutation of the vines.
