View Venn Diagram of Significant Markers by Trait for the Test Below Generates a Venn diagram of markers with significant association as determined by either the Genotype or Trend association test for the traits, so you can easily identify what markers are significant for one or more traits. In the example shown below, 25 markers are significantly associated with disease susceptibility, 4 markers are significantly associated with quantitative trait 1 and 2 (circled) are significantly associated with both, as determined by the Genotype test.