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Provedor de dados:  74
País:  Brazil
Título:  Molecular evolution of the ent-kaurenoic acid oxidase gene in Oryzeae
Autores:  Yang,Yanhua
Chen,Keping
Data:  2012-01-01
Ano:  2012
Palavras-chave:  Codon usage bias
Ent-kaurenoic acid oxidase (KAO)
Positive selection
Rate heterogeneity
Substitution rate
Resumo:  We surveyed the substitution patterns in the ent-kaurenoic acid oxidase (KAO) gene in 11 species of Oryzeae with an outgroup in the Ehrhartoidaea. The synonymous and non-synonymous substitution rates showed a high positive correlation with each other, but were negatively correlated with codon usage bias and GC content at third codon positions. The substitution rate was heterogenous among lineages. Likelihood-ratio tests showed that the non-synonymous/synonymous rate ratio changed significantly among lineages. Site-specific models provided no evidence for positive selection of particular amino acid sites in any codon of the KAO gene. This finding suggested that the significant rate heterogeneity among some lineages may have been caused by variability in the relaxation of the selective constraint among lineages or by neutral processes.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300011
Editor:  Sociedade Brasileira de Genética
Relação:  10.1590/S1415-47572012005000020
Formato:  text/html
Fonte:  Genetics and Molecular Biology v.35 n.2 2012
Direitos:  info:eu-repo/semantics/openAccess
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