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Nuclear exchange generates population diversity in the wheat leaf rust pathogen Puccinia triticina.
- Source :
-
Nature microbiology [Nat Microbiol] 2023 Nov; Vol. 8 (11), pp. 2130-2141. Date of Electronic Publication: 2023 Oct 26. - Publication Year :
- 2023
-
Abstract
- In clonally reproducing dikaryotic rust fungi, non-sexual processes such as somatic nuclear exchange are postulated to play a role in diversity but have been difficult to detect due to the lack of genome resolution between the two haploid nuclei. We examined three nuclear-phased genome assemblies of Puccinia triticina, which causes wheat leaf rust disease. We found that the most recently emerged Australian lineage was derived by nuclear exchange between two pre-existing lineages, which originated in Europe and North America. Haplotype-specific phylogenetic analysis reveals that repeated somatic exchange events have shuffled haploid nuclei between long-term clonal lineages, leading to a global P. triticina population representing different combinations of a limited number of haploid genomes. Thus, nuclear exchange seems to be the predominant mechanism generating diversity and the emergence of new strains in this otherwise clonal pathogen. Such genomics-accelerated surveillance of pathogen evolution paves the way for more accurate global disease monitoring.<br /> (© 2023. The Author(s).)
- Subjects :
- Phylogeny
Australia
Plant Diseases microbiology
Triticum microbiology
Subjects
Details
- Language :
- English
- ISSN :
- 2058-5276
- Volume :
- 8
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Nature microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 37884814
- Full Text :
- https://doi.org/10.1038/s41564-023-01494-9