Table 2.
Effect of the LEPR g.1987C > T SNP genotype on n6-fatty acid composition.
| Trait | P-valuea | LEPR b | ||
|---|---|---|---|---|
| CC | CT | TT | ||
| Backfat, mm | 0.003 | 25.8 ± 0.3a | 26.1 ± 0.3a | 27.0 ± 0.3b |
| IMF, % dry matter | <0.001 | 17.9 ± 0.3a | 18.1 ± 0.3a | 19.8 ± 0.4b |
| C18:2, % | <0.001 | 10.49 ± 0.09a | 10.29 ± 0.08a | 9.89 ± 0.10b |
| C20:2, % (x10) | <0.001 | 4.94 ± 0.05a | 4.84 ± 0.04a | 4.65 ± 0.06b |
| C20:4, % | 0.01 | 1.59 ± 0.03a | 1.54 ± 0.02ab | 1.48 ± 0.03b |
| C20:4/C18:2 (x10) | 0.44 | 1.53 ± 0.02 | 1.50 ± 0.02 | 1.49 ± 0.02 |
| C20:2/C18:2 (x100) | 0.85 | 4.77 ± 0.03 | 4.76 ± 0.03 | 4.78 ± 0.03 |
| C20:4/C20:2 | 0.64 | 3.28 ± 0.05 | 3.24 ± 0.04 | 3.21 ± 0.06 |
As compared to TT pigs, the CC pigs showed a higher content of arachidonic acid (C20:4) and eicosadienoic acid (C20:2) in muscle because they were fatter and not because they were more efficient transforming linoleic acid (C18:2) into C20:4 and C20:2. Subcutaneous fat was measured in terms of backfat thickness and intramuscular fat was determined in gluteus medius muscle. The proportion of each fatty acid is expressed as a percentage relative to total fatty acid content and, as well as ratios, adjusted for intramuscular fat (IMF) content. aP-value associated with the effect of the LEPR genotype; bPairwise comparisons of LEPR genotypes. Within row, means with different superscripts differ significantly (P < 0.05).