Abstract
Seedling (juvenile) resistance to 3 foliar diseases was studied in 540 samples of 24 Triticum L. species from VIR World Collection. Samples of T. timopheevii, T. militinae, T. zhukovskyi, T. timococcum and 4 of T. boeoticum were highly resistant to complex population of leaf rust causal agent. Presence of Puccinia recondita clones virulent to samples of T. miguschovae and T. kiharae (synthetic hexaploids with genome A b GD) indicates to partial suppression of resistance from species with A b G genome by D genome of Ae. tauschii . Two samples of T. araraticum and one of T. timopheevii were resistant to dark-brown leaf spot blotch. Three samples of T. araraticum and two of T. timopheevii were classified as resistant after inoculation with mixture of 7 Stagonospora nodorum isolates. All 239 samples of 6 species studied were susceptible to common root rot. The causes of differences between our results and that obtained in other studies are discussed.
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