Leaf Rust Resistance of 35 Wheat Cultivars (Lines)

Abstract

Wheat leaf rust caused by Puccinia triticina (Pt) is one of most severe fungal diseases threatening global wheat production. Rational utilization of the diversified leaf rust resistance (Lr) in different wheat cultivars is still the most efficient method to control this disease. Here in this study, 35 wheat cultivars collected from China main wheat growth region were tested for their seedling resistance to 16 different Pt races. Seedlings of 20 tested wheat cultivars showed high resistance phenotype to at least one Pt race. Various molecular markers closely linked to fifteen designated Lr genes were applied and only three Lr genes (Lr1, Lr10 and Lr26) were identified in some of the tested cultivars. All cultivars were then inoculated with bulked Pt races mixed with even of 10 pathotypes at adult plant stage to detect the adult plant resistance (APR). Five cultivars including Liangxing 66, Hemai 9735, Luyuan 301, Jimai 17 and Taishan 027 showed typical APR reaction in the field. Our results indicate that the diversity of known Lr genes in the tested wheat cultivars is relative low, but 10 of them contained more durable leaf rust resistance and can be released in wheat production and can be used as resistance breeding resources.

Journal of Plant Protection Research

“…In 66 cultivars from Argentina, using 17 different leaf rust pathotypes, 11 different genes were postulated: Lr1, Lr3a, Lr3ka, Lr9, Lr10, Lr16, Lr17, Lr19, Lr24, Lr26, and Lr4 (Vanzetti et al 2011). This method, in combination with the use of molecular markers, can also be used to postulate the genes of adult plants (APR genes) (Wei et al 2015;Li et al 2018;Baidya et al 2019). A lot of work on the postulation of seedling leaf rust resistance genes has been done in China (Li et al 2010;Li et al 2016;Gebrewahid et al 2017).…”

Effective resistance to leaf rust in spring bread wheat accessions among recent additions to the VIR collection

“…Sun et al, 2011;Vanzetti et al, 2011;Azzimonti et al, 2013;Dakouri et al, 2013;Draz et al, 2015;Li et al, 2018), однако очевидно, что эти формы не могут a priori рассматриваться как ценные…”