8th INTERNATIONAL WHEAT CONFERENCE

CuRReNT STATuS of BReAd WheAT ANd ITS ReLATIVeS
fRom VIR CoLLeCTIoN STudy foR effeCTIVe
ReSISTANCe To fuNgAL dISeASeS
Tyryshkin L.G., Kolesova M.A., Kovaleva M.A., Lebedeva
T.V., Zuev E.V., Brykova A.N., Gashimov M.E.
N.I. Vavilov All-Russian Institute of Plant Industry, S.-Petersburg, Russia, 190000, Bolshaya
Morskaia 42
E-mail Address of presenting author: tyryshkinlev@rambler.ru
Fungal diseases significantly reduce yield and grain quality of bread wheat in all regions
of its cultivation. Growing of resistant varieties is well-known to be the cheapest and ecologically
safe method of the crop protection. Creation of such varieties requires constant
search of the trait donors i.e. genetically characterized samples with high level of resistance
expression. Here we report results on evaluation of resistance to 6 fungal diseases in
soft wheat and its relatives from World collection of N.I. Vavilov All-Russian Institute of
Plant Industry.
Leaf rust (Puccinia recondita Rob. ex Desm. f.sp. tritici). High level of juvenile resistance
to the disease was found in 92 bread wheat samples out of 3845 under study;
phytopathological test, hybridological analysis and use of STS markers revealed only 4
genes for the effective resistance Lr 9, 19, 24 and 41; 3 of them are reported to lose their
effectiveness in some regions of Russian Federation due to their wide use in breeding
programs. Effective adult resistance was found in 24 local samples from Kazakhstan each
possessing 2 complementary recessive genes for the resistance one of them being
Lr13. All samples of Triticum timopheevii, T. militinае, T. zhukovskyi, T. timococcum and
4 of T. boeoticum were highly resistant to leaf rust as well as 57 forms of Aegilops species.
All Ae. tauschii and Ae. cylindrica samples resistant to the rust at seedling stage were
found to be protected with only gene Lr 41. For the first time partial suppression of the
T. timopheevii resistance by D genome of Ae. tauschii in T. kiharae and T. miguschovae
genotypes was shown. Additionally high level of adult rust resistance was confirmed in
some samples of Т. urartu T. boeoticum, T. monococcum and T. araraticum.
Dark-brown leaf spot blotch (Bipolaris sorokiniana Shoem.). No one highly resistant
form to the disease was found in samples of Triticum genus including T. aestivum. Among
samples of 17 Aegilops species (diploid ones and that of D-genome group) only 2 of Ae.
tauschii have effective resistance to spot blotch. Hybridological analysis allowed to identify
3 recessive genes for the resistance.
Common root rot (B. sorokiniana). High level of the juvenile resistance was not identified
in bread wheat and other species of Triticum genus. Among Aegilops species genotypes
highly resistant in seedling stage were found only in Ae. caudata and Ae. bicornis.
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