Population divergence in the wheat leaf rust fungus Puccinia triticina is correlated with wheat evolution

  title={Population divergence in the wheat leaf rust fungus Puccinia triticina is correlated with wheat evolution},
  author={M. To A. Liu and Nicolas Rodrigue and James A. Kolmer},
Co-evolution of fungal pathogens with their host species during the domestication of modern crop varieties has likely affected the current genetic divergence of pathogen populations. The objective of this study was to determine if the evolutionary history of the obligate rust pathogen on wheat, Puccinia triticina, is correlated with adaptation to hosts with different ploidy levels. Sequence data from 15 loci with different levels of polymorphism were generated. Phylogenetic analyses (parsimony… 

Whole-genome sequencing of multiple isolates of Puccinia triticina reveals asexual lineages evolving by recurrent mutations

The results suggest that recurrent mutation and selection play a major role in differentiation within the clonal lineages of P. triticina.

Endemic and panglobal genetic groups, and divergence of host-associated forms in worldwide collections of the wheat leaf rust fungus Puccinia triticina as determined by genotyping by sequencing

Isolates from durum wheat found only in Ethiopia were the first to diverge from a common ancestor form of P. triticina that is found on the wild wheat relative Aegilops speltoides, followed by the divergence of isolates found worldwide that are virulent to durum Wheat.

Genetically Divergent Types of the Wheat Leaf Fungus Puccinia triticina in Ethiopia, a Center of Tetraploid Wheat Diversity.

The diverse host environment of Ethiopia has selected and maintained a genetically divergent population of P. triticina, the wheat leaf rust fungus, in a center of host diversity.

Molecular-Genetic Polymorphism of Puccinia triticina in Southern Dagestan Relating to the Center of the Common Evolution between Agent Causing Leaf Rust and Wheat

Existence of pathogen population differentiation according to the results of virulence and microsatellite analysis indicates the existence of several genetically differing groups of isolates within the Derbent population.

Microsatellite analysis of Puccinia triticina from Triticum and Aegilops hosts

A low association was established between the SSR genotypes of P. triticina identified in the present study and the virulence phenotypes for the same set of collections, as observed in a previous study.

Selection of Puccinia triticina virulence genes on winter wheat varieties with different types of resistance

It was found that the genotype of a winter wheat variety with race-specific resistance significantly affects the virulence of the P. triticina population, confirming the importance of screening varieties by resistance types for further decision making on their placement.

Development of novel transcriptome-based SSR markers in Puccinia triticina and their potential application in genetic diversity studies

Results of this study suggest that the newly developed PtESSR markers are useful for genetic studies in P. triticina paths and no relationship was found between the genetic diversity and geographic distributions of the P.triticina populations.

Evaluation of Leaf Rust Resistance in the Spanish Core Collection of Tetraploid Wheat Landraces and Association with Ecogeographical Variables

Several resistant landraces of tetraploid wheats were identified that potentially may be used in durum wheat breeding programs and a predictive model was elaborated to develop smaller subsets for future screening with a higher hit rate for rust resistance.

Variability of the Russian populations of Puccinia triticina under the influence of the host plant

Adaptation and specificity to the host plant were shown as the key driving factors in the evolution and divergence of clonally propagating phytopathogens, which include leaf rust.



Differentiation of molecular genotypes and virulence phenotypes of Puccinia triticina from common wheat in North America.

The representative collection of P. triticina isolates had characteristics consistent with an asexual dikaryotic population of genetically differentiated groups of SSR genotypes with high levels of heterozygosity and disequilibrium within which stepwise mutation at avirulence or virulence loci regularly occurs.

Genetic differentiation of the wheat leaf rust fungus Puccinia triticina in Europe

The European population of P. triticina had higher levels of genetic differentiation compared to other continental populations, and there was a significant correlation between the SSR genotypes and virulence phenotypes of the isolates.

Low diversity and fast evolution in the population of Puccinia triticina causing durum wheat leaf rust in France from 1999 to 2009, as revealed by an adapted differential set

New information about leaf rust resistance genes present in the French durum wheat germplasm is provided, highlighting the need to diversify sources of resistance to P. triticina in this germ plasm.

Simple Sequence Repeat Diversity of a Worldwide Collection of Puccinia triticina from Durum Wheat.

Isolates of P. triticina from durum wheat from South America, North America, and Europe were closely related based on SSR genotypes, suggesting a recent common ancestor, whereas P. speltoides each had distinct SSR Genotypes, which suggested different origins.

Clonality and host selection in the wheat pathogenic fungus Puccinia triticina.

Genetic differentiation within the Puccinia triticina population in South America and comparison with the North American population suggests common ancestry and intercontinental migration.

The high degree of similarity for SSR genotype of isolates from both South America and North America suggested a common European origin of P. triticina that was introduced to both continents.

Molecular Phylogenetic Relationships of the Brown Leaf Rust Fungi on Wheat, Rye, and Other Grasses.

Three phylogenetic lineages were recovered within the complex of rye leaf rust fungi, P. recondita sensu stricto, which is congruent with existing classifications based on DNA content, sexual compatibility, and morphological studies.

Genetic differentiation of Puccinia triticina populations in the Middle East and genetic similarity with populations in Central Asia.

Although the two ME groups with virulence typical of isolates from common wheat were not differentiated for SSR genotype from groups of isolate from Central Asia based on R(ST), there was no direct evidence for migration between the two regions because all ME isolates differed from the Central Asia isolates for SSRs.

Virulence and Molecular Polymorphism in International Collections of the Wheat Leaf Rust Fungus Puccinia triticina.

On a worldwide level collections of P. triticina differ for virulence and molecular backgrounds as well as randomly amplified polymorphic DNA (RAPD) variation.

Wheat leaf rust caused by Puccinia triticina.

This review summarizes current knowledge of the P.triticina/wheat interaction with emphasis on the infection process, molecular aspects of pathogenicity, rust resistance genes in wheat, genetics of the host parasite interaction, and the population biology of P. triticina.