Resistance to diseases in samples of rare wheat species from the N.I. Vavilov All-Russian Institute of Plant Genetic Resources

Kolesova, M. A. and Lysenko, N. S. and Tyryshkin, L. G. (2022) Resistance to diseases in samples of rare wheat species from the N.I. Vavilov All-Russian Institute of Plant Genetic Resources. CEREAL RESEARCH COMMUNICATIONS, 50 (2). pp. 287-296. ISSN 0133-3720 (print), 1788-9170 (online)

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Abstract

Resistance to foliar diseases was studied in 67 samples of 8 Triticum L. species and 1 amphidiploid from the collection of the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR). Under the laboratory conditions resistance to leaf rust, Septoria nodorum blotch (SNB) and Helminthosporium leaf blotch (HLB) was studied at two temperatures. Resistance to hemibiotrophic pathogens was studied at concentrations of spores: 105, 106 and 5 × 106 conidia ml−1—for SNB and 2 × 104 and 4 × 104 spores ml−1—for HLB. Spores’ concentrations on the field experiments were 3 × 104, 106, 2 × 104 for leaf rust, SNB and HLB, respectively. Most of the samples were susceptible to the diseases at the seedling stage in all experiments. Adult plant resistance was studied after plants spraying with suspensions of pathogens’ spores and inoculation with microchambers. Under the laboratory conditions, only samples of T. monococcum L. and T. sinskajae A. Filat. et Kurk. were resistant to leaf rust at two temperatures. Under field conditions, samples of T. monococcum and T. sinskajae, two samples of T. dicoccum (Schrank) Schuebl. and one each of T. polonicum L. and T. turanicum Jakubz. were highly resistant to leaf rust. Two samples of T. persicum Vav. and T. sinskajae were resistant to HLB at 7th day after inoculation under high inoculation pressure at 22 °C, and all were susceptible at 28 °C. All samples were susceptible to SNB. Under field conditions, all samples were highly susceptible to SNB and HLB.

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