Am. Steiner et al., MAINTENANCE IN GENEBANKS, A CASE-STUDY - CONTAMINATIONS OBSERVED IN THE NURNBERG OATS OF 1831, Genetic resources and crop evolution, 44(6), 1997, pp. 533-538
The genetic identity and purity of the Nurnberg oats of 1831 stored at
Freising, Braunschweig and Lint were studied by storage-protein elect
rophoresis. The seven oat lines showed two electrophoretic phenotypes
with frequencies of five and two. All conceivable levels of contaminat
ion of the lines were found ranging from identity over contamination b
y the respective other Nurnberg phenotype and/or foreign phenotypes up
to the replacement of a line by a foreign phenotype. In addition, at
one of the storage sites the identification numbers are different. The
case study shows vividly that genotype maintenance in genebanks deman
ds the utmost care.