]> Qtl by linkage group The QtlByLinkageGroupRequest class represent information that must be provided in a qtl-by-linkage-group 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-linkage-group for details). The data to be provided consists of linkage group (represented by the map:linkageGroup property). 1