Aspects of the present invention also provide novel compositions and methods based on novel PAPD1 single nucleotide polymorphisms selected from the group consisting of AAFC02034082.1:g.9224G>A, g.9330A>C, g.9367G>C, g.9419A>C, g.9435T>G, g.9409[(G)4]+[(G)5], g.10084T>C, g.10228G>T, c.10326C>T and c.10364A>G, which may provide novel markers for intramuscular fat deposition. Additional aspects provide for novel methods which may comprise marker-assisted selection or marker-assisted management to improve intramuscular fat deposition in cattle.