Coffee Leaf Rust
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Coffea arabica clones resistant to coffee leaf miner
Abstract Brazilian arabica coffee production is based on a set of highly productive cultivars sexually propagated. All of them are susceptible to coffee leaf miner, Leucoptera coffeella, and most of them are also susceptible to coffee leaf rust, Hemileia vastatrix. Aiming to reduce the selection process of cultivars with multiple resistances to both biotic c
Crop Breed. Appl. Biotechnol.. Publicado em: 2016-03
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14. Effects of UV-B radiation on Lecanicillium spp., biological control agents of the coffee leaf rust pathogen
Coffee leaf rust is the main disease of coffee and its causal agent is naturally hyperparasited by Lecanicillium lecanii, indicating its potential for biocontrol. Ultraviolet-B (UV-B) radiation is an important factor that interferes on application of biocontrol agents, and Lecanicillium can be affected by UV-B. The objective of this work was to evaluate the
Trop. plant pathol.. Publicado em: 2014-10
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15. Effect of foliar application of potassium silicate on the progress of coffee leaf rust
In order to evaluate the effect of potassium silicate spray on the control of coffee leaf rust and coffee yield, an experiment was conducted during the 2005/2006 and 2006/2007 growing seasons on Coffea arabica cv. Catuaí Vermelho IAC 144, in a location situated at an elevation of 850 m in Coimbra, Minas Gerais, Brazil. The treatments consisted of: 1 - potas
Trop. plant pathol.. Publicado em: 2013-12
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16. New coffee (Coffea arabica) genotypes derived from Coffea canephora exhibiting high levels of resistance to leaf rust and Ceratocystis canker
The purpose of this study was to evaluate the resistance to coffee leaf rust (CLR) caused by Hemileia vastatrix and to Ceratocystis canker (Cc) in coffee genotypes derived from crosses of Coffea arabica var. Caturra with accessions of C. canephora backcrossed to Caturra. Twenty-three F3BC1 progenies including C. arabica var. Caturra and var. Colombia as cont
Trop. plant pathol.. Publicado em: 2013-12
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17. Rust resistance in Arabic Coffee cultivars in northern Paraná
The objective of the study was to evaluate the resistance to rust in coffee cultivars developed by research institutes of Brazil in Paraná state. Resistance to the local leaf rust races was assessed in high disease intensity field conditions at Londrina and Congonhinhas in 2009 and 2010.The cultivars were developed by the EPAMIG/UFV, IAPAR, IAC and MAPA/Pro
Braz. arch. biol. technol.. Publicado em: 2013-02
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18. Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
Coffee leaf rust (CLR), caused by the fungus Hemileia vastatrix, is among the most important diseases affecting coffee all over the world. In Kenya, it is currently the second most important disease, and breeding coffee to obtain new resistant cultivars has been a priority. Over time, new rust pathogenic races able to infect hitherto resistant coffee genotyp
Trop. plant pathol.. Publicado em: 2012-12
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19. Identificação e caracterização de genes que codificam proteínas secretadas por Hemileia vastatrix na interação com o cafeeiro / Identification and characterization of genes encoding proteins secreted by Hemileia vastatrix during interaction with coffee
The coffee leaf rust caused by the biotrophic fungus Hemileia vastatrix, it is the most important fungal disease of coffee, causing productivity losses and its control increases the costs of coffee production. This study aimed to identify genes of H. vastatrix that encode secreted proteins that may function as effectors needed for the establishment of the bi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2011
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20. Inheritance of coffee leaf rust reistance and identification of AFLP markers linked to the resistance gene.
The most important disease of Coffea arabica is coffee leaf rust caused by the fungus Hemileia vastatrix. The purpose of this study was to characterize the inheritance of coffee resistance gene(s) to race II of this pathogen and to identify and map molecular markers linked to this trait. Different populations were used: F2 (160 plants), BCr (20), and BCs (13
EUPHYTICA. Publicado em: 2011
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21. Inheritance of coffee leaf rust reistance and identification of AFLP markers linked to the resistance gene.
The most important disease of Coffea arabica is coffee leaf rust caused by the fungus Hemileia vastatrix. The purpose of this study was to characterize the inheritance of coffee resistance gene(s) to race II of this pathogen and to identify and map molecular markers linked to this trait. Different populations were used: F2 (160 plants), BCr (20), and BCs (13
EUPHYTICA. Publicado em: 2011
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22. Identification of coffee WRKY transcription factor genes and expression in resistance responses to pathogens.
In plants, WRKY proteins are a group of transcription factors existing as a gene superfamily that play important roles in regulation of defense response pathways. To assess the diversity of this protein family in coffee (Coffea spp.), data mining methods were used on a set of around 200,000 coffee expressed sequence tags. A total of 53 different putative WRK
TREE GENETICS & GENOMES. Publicado em: 2011
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23. Identification of coffee WRKY transcription factor genes and expression in resistance responses to pathogens.
In plants, WRKY proteins are a group of transcription factors existing as a gene superfamily that play important roles in regulation of defense response pathways. To assess the diversity of this protein family in coffee (Coffea spp.), data mining methods were used on a set of around 200,000 coffee expressed sequence tags. A total of 53 different putative WRK
TREE GENETICS & GENOMES. Publicado em: 2011
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24. Identification of a new race of Hemileia vastratix in Brazil.
In this study, a survey of physiological races of Hemileia vastatrix was carried out on 34 coffee leaf rust populations collected at several coffee genotypes in Brazil. After the inoculation on leaf disc of coffee differential clones, the races I, II, III, XIII, XVII and XXXVII were characterised. This is the first report of race XXXVII on Coffea arabica in
In.: AUSTRALASIAN PLANT DISEASE NOTES. Publicado em: 2011