Variability in isolates of Puccinia polysora in Brazil

Casela, C. R.; Ferreira, A. S.

doi:10.1590/s0100-41582002000400015

Cited by 16 publications

(11 citation statements)

References 6 publications

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“…Although the race-specific genes are more practical to work in breeding programs and usually confer a significant level of resistance, the horizontal resistance commonly is more durable and provides protection against greater range of races. Therefore, in tropical areas as Brazil, considering the high incidence and severity of southern rust, the horizontal resistance should be considered as a long-term strategy (Casela and Ferreira 2002).…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity, population structure and AFLP markers associated with maize reaction to southern rust

et al. 2019

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Maize is one of the species with greater genetic diversity among cereals and possibly the most diverse crop species known. Accessing this variability is essential for maize breeding, allowing breeders to achieve progress of yield increasing, overcome environmental challenges or deal with pests and diseases. Among the maize diseases, southern rust is one of the most important, causing significant losses in yield and presenting severe epidemics worldwide. In the present study, the AFLP technique was applied to analyze population structure and genetic diversity among 145 tropical maize inbred lines, and to test for preliminary evidence of association between AFLP markers and the reaction to southern rust. Disease severity was evaluated in two crop seasons and the accessions were genotyped through AFLP using four primer combinations.

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Section: Introductionmentioning

confidence: 99%

Genetic diversity, population structure and AFLP markers associated with maize reaction to southern rust

et al. 2019

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“…Southern rust has become one of the main diseases affecting corn crops in Brazil, mainly those subjected to high temperature and humidity conditions (Ramirez-Cabral et al 2017;Casela and Ferreira 2002). Some factors such as the use of susceptible hybrids and monocropping in no-till systems in association with weather conditions favorable to inoculant outspread have increased the occurrence of this disease in Brazilian crops (Colombo et al 2014;Costa et al 2012).…”

Section: Introductionmentioning

confidence: 99%

The combining ability of popcorn S7 lines for Puccinia polysora resistance purposes

et al. 2018

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The present study resulted from the lack of information on the genotypic expression ruling the resistance to rust and on the main traits of economic importance to the herein addressed crop. The combining ability of 16 popcorn lines and hybrids was assessed in partial diallel cross in two representative locations in Rio de Janeiro State, Brazil, where forty simple hybrids were obtained. The experiments followed a completely randomized block design with four repetitions and were conducted under natural infestation conditions in order to test the southern rust severity in the entire plant (SSW) and in the leaf of the first ear (SFPE), as well as the morpho-agronomic traits of greater interest: grain yield (GY) and

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“…Therefore, these fungal diseases are highly likely to occur as the models display. Common and southern rust CLIMEX models show large areas with optimal suitability for Africa and Latin‐America under current climate conditions; previous studies have shown that plant diseases are more frequent in these regions due to the tropical climate (Casela & Ferreira, ; Oerke, ). Moreover, southern rust is tropical and subtropical in distribution.…”

Section: Discussionmentioning

confidence: 97%

Global risk levels for corn rusts (Puccinia sorghi and Puccinia polysora) under climate change projections

Ramírez-Cabral

Kumar

Shabani

2017

Journal of Phytopathology

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Common rust (Puccinia sorghi) and southern rust (Puccinia polysora) are two of the most important foliar corn diseases worldwide. These fungi have caused severe economic loss to corn yields worldwide. The current and future potential distribution of these diseases was modelled with CLIMEX using the known current geographic locations of the rusts, growth and stress indices. The models were run under the A2 scenario using CSIRO‐Mk3·0 and MIROC‐H for 2050 and 2100. The current projection shows areas with marginal to optimal suitability in all the continents. The models for future projections display a general reduction in the Southern hemisphere and increase in the Northern hemisphere, especially for the southern rust. The overlay of the General Circulation Models produce an estimation of the common areas under risk for future climate conditions for the simultaneous occurrence for both corn rusts, with a reduction of the medium‐ and high‐risk categories by 2100. This study highlights the possible effects of climate change at a global level for common and southern rust, as well as the risk of occurrence of both diseases in common areas for future climate that could be particularly harmful for crops.

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Variability in isolates of Puccinia polysora in Brazil

Cited by 16 publications

References 6 publications

Genetic diversity, population structure and AFLP markers associated with maize reaction to southern rust

Genetic diversity, population structure and AFLP markers associated with maize reaction to southern rust

The combining ability of popcorn S7 lines for Puccinia polysora resistance purposes

Global risk levels for corn rusts (Puccinia sorghi and Puccinia polysora) under climate change projections

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