Table 4 Association of SNPs in the PPARG, CEBPA and RXRA genes with meat quality traits in an Argentinean crossbred cattle population: least square means and standard deviation (s.d.) of the genotypic classes based on the individual polymorphisms, additive and dominance effects, substitution effect and percentage of phenotypic variance explained by the SNP (σ 2 SNP ). N: number of samples; n.e.: non estimable; C18:0: stearic acid (%); C18:1 cis-9: oleic acid (%);C18:3 cis-6,9,12: ϒ-linolenic acid (%); C18:3 cis-9,12,15: α-linolenic acid (%); MUFA: monounsaturated fatty acids (%); Ω-6/Ω-3: omega-6/omega-3 proportion; BT: backfat thickness of beef (mm)
SNP/Trait | Least square means | Dominance effect | Aditive effect | Substitution effect | σ 2 SNP | ||
|---|---|---|---|---|---|---|---|
rs207671117 (PPARG) | GG (N = 244) | GA (N = 16) | AA (N = 0) | ||||
Ω-6/Ω-3 | 3.026 ± 0.081 | 2.314 ± 0.283 | ---- | n.e. | 0.712 ± 0.284 (P = 0.013) * | n.e. | 0.40 |
rs41610552 (PPARG) | CC (N = 135) | CG (N = 109) | GG (N = 12) | ||||
C18:1 cis-9 | 39.797 ± 0.276 | 40.445 ± 0.302 | 39.318 ± 0.737 | 0.888 ± 0.430 (P = 0.040) | 0.240 ± 0.374 (P = 0.522) | -0.190 (C > G) | 2.09 |
rs42016945 (PPARG) | CC (N = 146) | CT (N = 86) | TT (N = 27) | ||||
C18:0 | 14.047 ± 0.199 | 13.586 ± 0.246 | 14.369 ± 0.414 | -0.622 ± 0.295 (P = 0.036) | 0.160 ± 0.218 (P = 0.462) | 0.445 (C > T) | 0.80 |
BT | 3.641 ± 0.130 | 3.586 ± 0.160 | 3.064 ± 0.269 | 0.234 ± 0.195 (P = 0.231) | 0.288 ± 0.143 (P = 0.045) | 0.181 (C > T) | 0.31 |
rs133517803 (RXRA) | GG (N = 132) | GA (N = 109) | AA (N = 16) | ||||
C18:1 cis-9 | 40.115 ± 0.280 | 39.836 ± 0.286 | 41.650 ± 0.660 | -1.047 ± 0.395 (P = 0.009) | 0.768 ± 0.336 (P = 0.023) | 1.241 (G > A) | 1.77 |
18:3 cis-6,9,12 | 0.055 ± 0.006 | 0.045 ± 0.007 | 0.018 ± 0.017 | 0.013 ± 0.011 (P = 0.223) | 0.018 ± 0.009 (P = 0.040) | 0.012 (G > A) | 0.35 |
C18:3 cis-9,12,15 | 0.796 ± 0.024 | 0.805 ± 0.025 | 0.644 ± 0.062 | 0.085 ± 0.039 (P = 0.030) | 0.076 ± 0.032 (P = 0.019) | 0.038 (G > A) | 1.47 |
MUFA | 48.044 ± 0.277 | 47.796 ± 0.283 | 49.690 ± 0.656 | -1.071 ± 0.393 (P = 0.007) | 0.823 ± 0.334 (P = 0.014) | 1.306 (G > A) | 1.35 |
BT | 3.683 ± 0.141 | 3.481 ± 0.144 | 2.910 ± 0.353 | 0.185 ± 0.215 (P = 0.392) | 0.387 ± 0.182 (P = 0.035) | 0.303 (G > A) | 0.95 |