{
  "default":{
    "ruler" : {
      "width" : 5,
      "fillColor" : "aqua",
      "position" : -2
    },
    "backbone":{
      "width":10
    },
    "qtl" : {
      "fillColor" : ["red"],
      "width" : 3,
      "labelSize" : 10
    },
    "marker" : {
      "labelPosition" : -1,
      "labelSize" : 10
    },
    "tracks" : [{
      "type" : "qtl",
      "title" : "group 1",
      "filters":["QTL_pod","QTL_leaf-stem","QTL_whole-plant","QTL_root"],
      "fillColor": ["lightgreen","darkgreen","purple","mediumorchid"],
      "position":-1
    },{
      "type" : "qtl",
      "title" : "group 2",
      "filters":["QTL_other-seed","QTL_oil","QTL_protein","QTL_reprod-period"],
      "fillColor": ["pink","goldenrod","lightblue","blue"],
      "position": -1
    }
    ]
  }
}