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Feed intake and growth are economically important traits in swine production. Previous genome wide association studies (GWAS) have utilized average daily gain or daily feed intake to identify regions that impact growth and feed intake across time. The use of longitudinal models in GWAS studies, such as random regression, allows for SNPs having a heterogeneous effect across the trajectory to be characterized. The objective of this study is therefore to conduct a single step GWAS (ssGWAS) on the animal polynomial coefficients for feed intake and growth.

Corrected daily feed intake (DFI _Adj ) and average daily weight measurements (DBW _Avg ) on 8981 (n = 525,240 observations) and 5643 (n = 283,607 observations) animals were utilized in a random regression …