]> Qtl by trait ontology symbol The QtlByTraitSymbolRequest class represent information that must be provided in a qtl-by-trait-symbol resource graph by a client in order to retrieve a Qtl object (see the resource description graph at http://sswap.gramene.org/vpin/qtl-by-trait-symbol for details). The data to be provided consists of trait symbol (represented by the trait:symbol property). 1