EFFECTIVE JUVENILE RESISTANCE OF COLLECTION ACCESSIONS OF SPRING SOFT WHEAT FROM CHINA TO FOLIAR DISEASES

Abstract

According to the scientific literature data, some samples of bread wheat from China are resistant to a range of diseases. The paper presents the results of the study of juvenile resistance to leaf rust (Puccinia triticina Erikss.), dark-brown leaf spot blotch (Bipolaris sorokiniana Shoem.) and septoriosis (Stagonospora nodorum (Berk.) Castell. et Germano) in 263 samples of spring bread wheat from the World Collection of the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR) originating from China. The material was presented by landraces and breeding varieties and lines. To evaluate resistance/susceptibility, intact seedlings were pulverized with water suspensions of natural P. triticina population uredospores, of mixture of B. sorokiniana and S. nodorum isolates conidia. All samples under study were highly susceptible to the rust and dark-brown leaf spot blotch. Variety Bai Quan 3087 (k-67801) was highly resistant to used isolates of S. nodorum. This sample is of undoubted interest for the breeding of bread wheat for resistance to septoriosis.