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Provedor de dados:  Bragantia
País:  Brazil
Título:  SH1 leaf rust and bacterial halo blight coffee resistances are genetically independent
Autores:  Rodrigues,Lucas Mateus Rivero
Braghini,Masako Toma
Guerreiro Filho,Oliveiro
Data:  2017-04-01
Ano:  2017
Palavras-chave:  Coffea arabica L.
Resistant cultivars
Pseudomonas syringae pv. garcae
Linkage
Hemileia vastatrix
Pleiotropic effect
Resumo:  ABSTRACT Coffee resistance to Pseudomonas syringae pv. garcae has been associated to pleiotropic effect of SH1 allele, present in coffee plants resistant to certain races of Hemileia vastatrix, the causal agent of leaf rust, or genetic linkage between resistance alleles to both pathogens. To validate this hypothesis, 63 coffee plants in F2 generation were evaluated for resistance to 2 isolates of H. vastatrix carriers of alleles, respectively, v2, v5 (isolate I/2015) and v1; v2; v5 (isolate II/2015) with the objective to confirm presence of SH1 allele in resistant plants to isolate I/2015. The same coffee plants were evaluated for resistance to a mixture of P. syringae pv. garcae strains highly pathogenic to coffee. Results showed that, among F2 coffee allele SH1 carriers, resistant to isolate I/2015, resistant and susceptible plants to bacterial halo blight were found; the same segregation occurs between F2 homozygous for SH1 allele, susceptible to the same isolate (I/2015) of H. vastatrix. Results also indicate that there is no pleiotropic effect of gene or allele SH1 connection between genes conferring resistance to leaf rust caused by H. vastatrix and bacterial halo blight caused by P. syringae pv. garcae.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200209
Editor:  Instituto Agronômico de Campinas
Relação:  10.1590/1678-4499.171
Formato:  text/html
Fonte:  Bragantia v.76 n.2 2017
Direitos:  info:eu-repo/semantics/openAccess
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