Methods are provided for improving the impact of genetically diversified stimulus response gene association (GDSRGA) studies. The methods may involve developing subpopulations to be contrasted in GDSRGA studies by obtaining a biological sample from each donor of a population of donors; selecting a common cohort from the biological samples by obtaining at least a partial genomic sequence from each biological sample, aligning the sequences of the biological samples, and removing biological samples that cannot be sequenced accurately or fail to align; applying a test molecule or condition to the biological samples to induce phenotypically distinct responses among the members of the cohort; and segregating the biological samples into subpopulations based on the phenotypically distinct responses. These subpopulations may be used in GDSRGA studies.
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