Comparative Analysis of Virulence and Molecular Diversity of <i>Puccinia striiformis</i> f. sp. <i>tritici</i> Isolates Collected in 2016 and 2023 in the Western Region of China.

ABSTRACT: Puccinia striiformis f. sp. tritici (Pst) is adept at overcoming resistance in wheat cultivars, through variations in virulence in the western provinces of China. To apply disease management strategies, it is essential to understand the temporal and spatial dynamics of Pst populations. This study aimed to evaluate the virulence and molecular diversity of 84 old Pst isolates, in comparison to 59 newer ones. By using 19 Chinese wheat differentials, we identified 98 pathotypes, showing virulence complexity ranging from 0 to 16. Associations between 23 Yr gene pairs showed linkage disequilibrium and have the potential for gene pyramiding. The new Pst isolates had a higher number of polymorphic alleles (1.97), while the older isolates had a sligh

SUBMITTER: Gebremariam TG 

PROVIDER: S-EPMC11121451 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature