The field association analysis was conducted using combined data across 3 years (2013, 2015, and 2016) for infection response (IR) and disease severity (SEV) for each of the four Pgt races (RCRSC, QTHJC, TPMKC, and QFCSC) using both single-locus mixed model and MLMM. This evidence concerns the gene SLCO2A1 and infection.