Abstract:
The 1RS chromosome segment derived from Petkus rye carries genes for resistance to
three wheat rust diseases, namely
Lr26
for resistance to leaf rust (caused by
Puccinia
triticina
),
Yr9
for resistance to stripe rust (
P.striiformis
f. sp.
tritici
) and
Sr31
for resistance
to stem rust (
P. graminis
f. sp.
tritici
). Since
Sec-1
is tightly linked with the three rust resis-
tance genes electrophoresis it is a useful method to identify and confirm the presence of
three rust resistance genes in current wheat populations. SDS-PAGE was used to examine
eight Iranian wheat cultivars for resistance to three rusts. The eight Iranian wheat culti-
vars examined were Alvand, Darab 2, Tajan,
Nicknejad, Mahdavi, Zarrin, Alamoot and
Atrak. The SDS-PAGE results showed that cultivars Mahdavi and Atrak have
Sec-1
bands and are therefore likely to carry the 1BL.1RS translocation and the linked genes
Yr9, Lr26
and
Sr31.
