Identification of known leaf rust resistance genes in bread wheat cultivars from China

Abstract

Leaf rust caused by Puccinia triticina Eriks. (Pt) is one of the most devastating fungal pathogens affecting wheat (Triticum aestivum L.) production worldwide. Deployment of resistant cultivars is the most environmentally friendly approach to control the disease. In this study, thirty-seven wheat lines from the Hubei and Shaanxi provinces in China were evaluated for seedling resistance in the greenhouse using eighteen Pt races. These lines were also tested for slow rusting resistance in the field in the 2014 to 2018 growing seasons. Eleven molecular markers closely associated with known Lr genes were used as part of the postulation process. Seven known Lr genes, 1, 13, 18, 14a, 26, 34 and 46 either singly or in combination were postulated in twenty-five cultivars. Lr1 and Lr26 were the most commonly identified genes detected in thirteen and ten cultivars, respectively. Lr13 and Lr46 were each found in four and five cultivars. Lr34 was present in three cultivars. Lr18 and Lr14a were identified in cultivar Xi’nong 538. Six cultivars displayed slow rusting resistance in the field tests. The resistant cultivars identified in the present study can be used as resistance parents in crosses aimed at pyramiding and the deployment of leaf rust resistance genes in China.

Documentation of multi-pathotype durable resistance in exotic wheat genotypes to deadly stripe and leaf rust diseases

“…The leaf rust of wheat is also considered the most prevalent and widely distributed of the three rusts and has major economic importance worldwide causing significant losses (Huerta-Espino et al 2011;Singh et al 2014;Yan et al 2021). The crop losses due to leaf rust are mainly because of their infection at flag leaf stage, which plays a significant role in the physiological process of grain formation and grain filling.…”

Identification of genes for leaf rust resistance in seedlings of wheat cultivars from the Yellow-Huai Basin in China and slow rusting observations in field trials

“…Twelve genes,Lr1,3,3bg,3ka,11,13,14a,16,26,27,30 and 31 were identified to be present either individually or in combination in 84 Chinese wheat cultivars (Ren et al 2015). Yan et al (2021) postulated seven known Lr genes (Lr1,13,18,14a,26,34 and 46) 39 wheat accessions using 18 Pt races.…”