Breeding of bread wheat for leaf rust resistance in Russia

Elena Gultyaeva,Y Tokarev,V Glupov

doi:10.1051/bioconf/20201800013

Abstract

Leaf rust, caused by the fungus Puccinia triticina Erikss., is one of the most common diseases of wheat in Russia. The paper reviews Lr-genes diversity in Russian commercial wheat varieties. Two hundred and sixty-four winter and one hundred and forty-three spring wheat varieties indexed by the State Register of Breeding Achievements in 2005-2018 were studied. It was found that among new varieties, as many as 5% of winter wheat and 30% of spring wheat possess effective seedling resistance. The wide presence of Lr19 and Lr9 genes was detected in the spring wheat. Besides, the high resistance to leaf rust was found in spring wheat varieties with new alien Lr genes (originated from Thinopyrum intermedium (Host) Barkworth & D.R. Dewey and Aegilops speltoides Tausch. Over 40% of winter wheat varieties have different levels of field resistance as well. The molecular screening revealed three varieties with effective adult plant resistance gene Lr37. Other winter wheat varieties include a range of ineffective genes (Lr1, Lr3, Lr10, Lr26, and Lr34), alone or in various combinations.

Highlights

Wheat is an important crop, and leaf rust, caused by the fungus Puccinia triticina Erikss., is one of the most common diseases of wheat in Russia [1]
In the period between 1990 and 2000 severe epidemics of leaf rust were reported for 2-3 times causing 30-35% of yield loss in the North Caucasian region
Presence of Lr19 and Lr9 genes was detected widely in the spring wheat indexed in the State Register and recommended for growing in Russia (Table 1)

Summary

Introduction

Wheat is an important crop, and leaf rust, caused by the fungus Puccinia triticina Erikss., is one of the most common diseases of wheat in Russia [1]. In the period between 1990 and 2000 severe epidemics of leaf rust were reported for 2-3 times causing 30-35% of yield loss in the North Caucasian region. During the same period our laboratory has been conducting seedling resistance studies of common wheat varieties recommended for the cultivation in Russia.

Results

Conclusion