Viện bảo vệ thực vật/Plant Protection Research Institute (PPRI) - www.ppri.org.vn

Leaf rust of barley, caused by Puccinia hordei, is the most common and prevalent disease in temperate barley-growing regions (Park et al., 2015). This disease can cause yield losses of up to 62% in susceptible cultivars under epidemic conditions (Clifford, 1985; Cotterill et al., 1992; Griffey et al., 1994; Park et al., 2015). Deploying host resistance has long been considered a cost-effective and environmentally friendly method to protect crop yield from this pathogen (Dinh et al., 2020). So far, 28 loci conferring resistance to leaf rust in barley have been characterized, viz. Rph1 to Rph28 (Mehnaz et al., 2021), of which 25 (Rph1-Rph19, Rph21, Rph22, Rph25, Rph26, Rph27, and Rph28) confer resistance at all growth stages (all stage resistance or ASR), and three (Rph20, Rph23, and Rph24) confer resistance at adult growth stages (adult plant resistance or APR) only. Notably, all the ASR genes conferring resistance to P. hordei identified so far are dominant. Up to date, only four out of 28 Rph genes have been isolated, with three genes encoding proteins of the Nucleotide-Binding LeucineRich Repeat (NLR) family (Dracatos et al., 2019; Wang et al., 2019; Chen et al., 2021) and one gene encoding protein of a distinct class (Dinh et al., 2022)

For details, please click here