Schriften zu Genetischen Ressourcen - Genres

E.R.J. KELLER, A. SENULA and H. SCHULZ
Fig. 2:
Relative percentages of some selected cysteine sulfoxides in the basal parts of
the plants
Note that the hybrid plants show intermediate behaviour
Discussion and conclusions
The genepool of wild Allium species accumulated in the Gatersleben collection provides
a good background for
%
90
80
70
60
50
40
30
20
10
0
A. obliquum Hybrid
A. cepa
methyl
2-propenyl
1-propenyl
hybridisation programmes in
breeding and basic research.
Examples demonstrated in
this study are an initial step
for further strategies. Primary
hybrids derived from distant
crosses are usually seedsterile.
Therefore, diploidisation
of the material should be
attempted to obtain presumably
fertile amphidiploid plants.
One of the options to get such
material is in vitro colchicination.
First hybrids have been
treated with colchicine in our laboratory. A sample of 150 plants from in vitro colchicine
treatment has been transferred into the field. First measurements by flow cytometry
resulted in 131 plants with doubled chromosome sets. Once the plants come
to the flowering stage, seed set will be the final prove of successful production of fertile
plants.
Management and sensible use of the genetic diversity within a group of crop plant
species and their wild relatives offers a promising way to future use of the richness of
their genepool.
References
EMSWELLER, S.L. and H.A. JONES (1935): An interspecific hybrid in Allium. - Hilgardia
9, 277-288.
277