Genetic Differentiation of <i>Puccinia triticina</i> Populations in Central Asia and the Caucasus

Kolmer, J. A.; Ordoñez, M. E.

doi:10.1094/phyto-97-9-1141

Cited by 53 publications

(51 citation statements)

References 37 publications

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“…The four regional populations from Russia were compared for SSR genotype with previously examined P. triticina populations from central Asia and the Caucasus (Kolmer & Ordoñez, ). Populations from northern Kazakhstan (25 isolates), southern Kazakhstan (39 isolates), a group of highly similar isolates from Tajikistan, Kyrgyzstan and Uzbekistan (22 isolates), and the Caucasus region of Armenia, Azerbaijan, and Georgia (13 isolates), were tested for genetic differentiation from the Russian populations.…”

Section: Resultsmentioning

confidence: 99%

“…The Russian isolates were compared for SSR genotype with a collection of 99 P. triticina isolates from central Asia (north Kazakhstan, south Kazakhstan, Tajikistan, Uzbekistan, Kyrgyzstan) and the Caucasus region of Armenia, Azerbaijan and Georgia (Kolmer & Ordoñez, ) that had been previously characterized for SSR genotype with the same set of 23 microsatellite primers. Collections from north Kazakhstan were from the region northwest of Pavlodar.…”

Section: Methodsmentioning

confidence: 99%

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Russian populations of Puccinia triticina in distant regions are not differentiated for virulence and molecular genotype

et al. 2014

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The objective of this study was to determine whether genetically distinct groups of Puccinia triticina are present in four regions of the Russian Federation. Collections of P. triticina were obtained from the Central, North Caucasus, Volga and West Siberia regions from 2006 to 2010. Ninety‐nine single uredinial isolates were tested for virulence phenotype with 20 Thatcher near‐isogenic lines of wheat. Forty‐one virulence phenotypes were found in the four regions, with eight in common between the widely separated Central and West Siberia regions. A total of 72 isolates were tested for molecular genotype with 23 simple sequence repeat (SSR) primer pairs, and 66 isolates were used for further analysis after clone correction for virulence and molecular genotype. Analysis of variation showed no overall differentiation of SSR genotypes or virulence phenotypes based on region of origin. Linkage disequilibria for SSR genotypes were high across the entire population. The regional populations had higher than expected levels of allelic heterozygosity that indicated clonal reproduction. Based on cluster analysis of SSR genotypes there were two groups of P. triticina isolates that were widely distributed across Russia. The two SSR groups also differed significantly for virulence. Puccinia triticina may be dispersed from a common source of inoculum in the European or Caucasus regions of Russia. The Russian P. triticina populations were highly differentiated for SSR genotype from populations in Tajikistan, Kyrgyzstan, Uzbekistan, Armenia, Georgia and Azerbaijan and more similar to populations from southern Kazakhstan and northern Kazakhstan.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Russian populations of Puccinia triticina in distant regions are not differentiated for virulence and molecular genotype

et al. 2014

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“…Using STRUCTURE version 2, similar significant variation in Pt populations from Central Asia and the Caucasus was also observed, which separated these populations from the North American isolates of Pt (ref. 31). …”

Section: Discussionmentioning

confidence: 99%

Population Differentiation of Wheat Leaf Rust Fungus <i>Puccinia triticina</i> in South Asia

et al. 2017

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“…No virulence to Lr9, Lr23, Lr24 or Lr26 was found in the new races identified (Sibikeev et al 1996). Kolmer and Ordoñez (2007) tested isolates of P. triticina collected from common wheat in the Central Asian countries of Kazakhstan, Uzbekistan, Tajikistan, and Kyrgyzstan, as well as in the Caucasus countries of Azerbaijan, Georgia, and Armenia. Isolates were tested on 20 leaf rust differentials and genotyped for molecular markers at 23 SSR loci.…”

Section: Middle East North Africa and Central Asiamentioning

confidence: 96%

Global status of wheat leaf rust caused by Puccinia triticina

et al. 2011

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Leaf rust caused by Puccinia triticina is the most common and widely distributed of the three wheat rusts. Losses from leaf rust are usually less damaging than those from stem rust and stripe rust, but leaf rust causes greater annual losses due to its more frequent and widespread occurrence. Yield losses from leaf rust are mostly due to reductions in kernel weight. Many laboratories worldwide conduct leaf rust surveys and virulence analyses. Most currently important races (pathotypes) have either evolved through mutations in existing populations or migrated from other, often unknown, areas. Several leaf rust resistance genes are cataloged, and high levels of slow rusting adult plant resistance are available in high yielding CIMMYT wheats. This paper summarizes the importance of leaf rust in the main wheat production areas as reflected by yield losses, the complexity of virulence variation in pathogen populations, the role cultivars with racespecific resistance play in pathogen evolution, and the control measures currently practiced in various regions of the world.

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Genetic Differentiation of Puccinia triticina Populations in Central Asia and the Caucasus

Cited by 53 publications

References 37 publications

Russian populations of Puccinia triticina in distant regions are not differentiated for virulence and molecular genotype

Russian populations of Puccinia triticina in distant regions are not differentiated for virulence and molecular genotype

Population Differentiation of Wheat Leaf Rust Fungus <i>Puccinia triticina</i> in South Asia

Global status of wheat leaf rust caused by Puccinia triticina

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