Juvenile resistance to diseases in samples of Triticum L. species from VIR World Collection

Tyryshkin, L. G. and Gashimov, M. E. and Kolesova, M. A. and Anphilova, N. A. (2006) Juvenile resistance to diseases in samples of Triticum L. species from VIR World Collection. Cereal Research Communications, 34 (2-3). pp. 1073-1079. ISSN 0133-3720

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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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