Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya

Detalhes bibliográficos
Autor(a) principal: Gichuru,Elijah K.
Data de Publicação: 2012
Outros Autores: Ithiru,John M., Silva,Maria C., Pereira,Ana P., Varzea,Vitor M.P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Tropical plant pathology (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762012000600008
Resumo: 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 genotypes have been registered. To date, 49 races of the pathogen have been characterized all over the world. The most recent races to be characterized are able to infect derivatives of Timor Hybrid (HDT), which is a major source of resistance in breeding programs. This work aimed to identify new races of the pathogen in Kenya, emphasizing infected leaves sampled from CLR resistant varieties and breeding lines collected from two sites (Ruiru and Koru). Twenty-four samples were characterized, out of which 22 samples corresponded to new races of the pathogen. A total of six new races (III, XVII, XXIII, XXXVI, XLI and XLII) were characterized, revealing three new virulence genes (v1, v7, v8) and possibly a fourth virulence gene, the v9. This finding represents a serious threat to coffee production and also a challenge to coffee breeding programs that are in progress in Kenya.
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spelling Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in KenyaCoffeleaf rustracesresistancevirulence genesCoffee 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 genotypes have been registered. To date, 49 races of the pathogen have been characterized all over the world. The most recent races to be characterized are able to infect derivatives of Timor Hybrid (HDT), which is a major source of resistance in breeding programs. This work aimed to identify new races of the pathogen in Kenya, emphasizing infected leaves sampled from CLR resistant varieties and breeding lines collected from two sites (Ruiru and Koru). Twenty-four samples were characterized, out of which 22 samples corresponded to new races of the pathogen. A total of six new races (III, XVII, XXIII, XXXVI, XLI and XLII) were characterized, revealing three new virulence genes (v1, v7, v8) and possibly a fourth virulence gene, the v9. This finding represents a serious threat to coffee production and also a challenge to coffee breeding programs that are in progress in Kenya.Sociedade Brasileira de Fitopatologia2012-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762012000600008Tropical Plant Pathology v.37 n.6 2012reponame:Tropical plant pathology (Online)instname:Sociedade Brasileira de Fitopatologiainstacron:SBF10.1590/S1982-56762012000600008info:eu-repo/semantics/openAccessGichuru,Elijah K.Ithiru,John M.Silva,Maria C.Pereira,Ana P.Varzea,Vitor M.P.eng2012-12-05T00:00:00Zoai:scielo:S1982-56762012000600008Revistahttps://www.scielo.br/j/tpp/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbf-revista@ufla.br1983-20521982-5676opendoar:2012-12-05T00:00Tropical plant pathology (Online) - Sociedade Brasileira de Fitopatologiafalse
dc.title.none.fl_str_mv Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
title Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
spellingShingle Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
Gichuru,Elijah K.
Coffe
leaf rust
races
resistance
virulence genes
title_short Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
title_full Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
title_fullStr Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
title_full_unstemmed Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
title_sort Additional physiological races of coffee leaf rust (Hemileia vastatrix) identified in Kenya
author Gichuru,Elijah K.
author_facet Gichuru,Elijah K.
Ithiru,John M.
Silva,Maria C.
Pereira,Ana P.
Varzea,Vitor M.P.
author_role author
author2 Ithiru,John M.
Silva,Maria C.
Pereira,Ana P.
Varzea,Vitor M.P.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Gichuru,Elijah K.
Ithiru,John M.
Silva,Maria C.
Pereira,Ana P.
Varzea,Vitor M.P.
dc.subject.por.fl_str_mv Coffe
leaf rust
races
resistance
virulence genes
topic Coffe
leaf rust
races
resistance
virulence genes
description 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 genotypes have been registered. To date, 49 races of the pathogen have been characterized all over the world. The most recent races to be characterized are able to infect derivatives of Timor Hybrid (HDT), which is a major source of resistance in breeding programs. This work aimed to identify new races of the pathogen in Kenya, emphasizing infected leaves sampled from CLR resistant varieties and breeding lines collected from two sites (Ruiru and Koru). Twenty-four samples were characterized, out of which 22 samples corresponded to new races of the pathogen. A total of six new races (III, XVII, XXIII, XXXVI, XLI and XLII) were characterized, revealing three new virulence genes (v1, v7, v8) and possibly a fourth virulence gene, the v9. This finding represents a serious threat to coffee production and also a challenge to coffee breeding programs that are in progress in Kenya.
publishDate 2012
dc.date.none.fl_str_mv 2012-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762012000600008
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1982-56762012000600008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1982-56762012000600008
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Fitopatologia
publisher.none.fl_str_mv Sociedade Brasileira de Fitopatologia
dc.source.none.fl_str_mv Tropical Plant Pathology v.37 n.6 2012
reponame:Tropical plant pathology (Online)
instname:Sociedade Brasileira de Fitopatologia
instacron:SBF
instname_str Sociedade Brasileira de Fitopatologia
instacron_str SBF
institution SBF
reponame_str Tropical plant pathology (Online)
collection Tropical plant pathology (Online)
repository.name.fl_str_mv Tropical plant pathology (Online) - Sociedade Brasileira de Fitopatologia
repository.mail.fl_str_mv sbf-revista@ufla.br
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