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@plantdiseasej.bsky.socialOct 2, 2026, 10:06 PM

#Puccinia coronata f. sp. avenae (Pca) is a threat to oat production in Australia. Through virulence and genomic analysis of Pca isolates collected across Australian oat-producing regions, Zhouyang Su et al. identified new races and a new lineage: https://doi.org/10.1094/PDIS-11-25-2239-SC

Fig. 2. A maximum-likelihood (ML) phylogenetic tree of 380 Puccinia coronata f. sp. avenae isolates worldwide. A midpoint-rooted ML tree was constructed using 396,452 biallelic single-nucleotide polymorphisms, with 500 bootstrap replicates. Bootstrap support values ≥80% are indicated by white circles. Isolates collected in 2024 are shown with bold text. Previously characterized Australian lineages (L1 to L18) are shown with brackets. The newly described L19 is indicated with a star. Scale bar represents mean substitutions per site.
@jhortscib.bsky.socialSep 29, 2026, 11:47 AM

#DNA markers for newly discovered genetic loci Phr3 and Phr4, conferring #resistance to white rust in #Chrysanthemum morifolium
To read this new article in JHSB visit: doi.org/10.1080/1462...

#Puccinia #GWAS #SNP

@wheatpath.bsky.socialSep 29, 2026, 8:25 AM

Virulence and genotypic diversity of the #wheat stem #rust pathogen (#Puccinia graminis f. sp. tritici) in #Jordan and the response of durum wheat genotypes to infection doi.org/10.1094/PDIS...

@phytopathology.bsky.socialSep 27, 2026, 11:04 PM

Long-term collection of #Puccinia striiformis f. sp. tritici isolates in Canada provides a unique perspective on pathogen evolution. Bohan Wei et al. extend previous race structure analyses by characterizing 73 isolates from wheat, barley, and wild barley: https://doi.org/10.1094/PHYTO-02-26-0058-R

Fig. 1. Number of isolates with Puccinia striiformis f. sp. tritici race designations per province.