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Resistance to brown leaf rust of hybrids between wheat and amphiploids wheat-thinopyrum

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Author(s): Alexander Lvovivh SECHNYAK | Alexei Anatolievich VASILIEV | Irina Sergeevna TKACHENKO

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVIII;
Issue: 2;
Start page: 136;
Date: 2011;
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Keywords: brown leaf rust | resistance | wide crosses | wheat-alien amphiploids | Thinopyrum ponticum | Thinopyrum intermedium

ABSTRACT
The resistance to a brown leaf rust in 56 chromosomal partial аmphiploids (Triticum aestivum L. × Thinopyrum ponticum (Podp.) Z.-W. Liu and R.-C. Wang), РА 2 (Triticum aestivum L. × Thinopyrum intermedium (Host) Barkworth and D.R. Devey), H79/9-9 (Triticum aestivum L. × Elymus sp.), Triticum aestivum L. cvs. Albatross odesskiy, Fantaziya odesskaya, Zhatva Altaya and their hybrids, F2-F4 were studied at artificial infection in field infectious nursery in 2009, 2010 and 2011. The investigated varieties of wheat have shown a high susceptibility to pathogen. Amphiploids РА 1 and РА 2 also are susceptible to pathogen, but in a lesser degree, than the wheat. Good resistance was shown only by amphiploid Н79/9-9, but its hybrid with wheat Albatross Odessa appeared is susceptible to pathogen. The hybrids with amphiploids РА 1 and РА 2 have shown a various degree of resistance to brown leaf rust. Hybrid Zhatva Altaya × РА 2 within three years stably showed 8 point resistance to disease. The reasonsfor different resistance of amphiploids and its hybrids with wheat are discussed.
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