Lipids deposition, composition and oxidative stability of subcutaneous adipose tissue and Longissimusdorsi muscle in Guizhou mini-pig at different developmental stages

The aim of this study was to investigate the effect of developmental stage on lipids deposition, composition and oxidative stability of subcutaneous adipose tissue (SAT) and Longissimusdorsi muscle (LDM) in Guizhou mini-pig. Pigs were raised in the same condition, and SAT and LDM were sampled on 90 d, 180 d and 270 d. Lipids content decreased (P < 0.01) from 90 d to 180 d and increased (P < 0.01) from 180 d to 270 d in SAT and LDM. Neutral lipids in both tissues decreased (P < 0.01) from 90 d to 180 d and increased (P < 0.01) from 180 d to 270 d, while phospholipids content changed inversely during the three selected time points. Developmental times had great influence on fatty acids (FAs) composition of neutral lipids, phospholipids and free fatty acids (FFAs) except FAs composition of FFAs in SAT. Lipids oxidative stability in SAT and LDM both decreased between 90 d and 180 d (P < 0.05) and increased by 270 d (P < 0.05). In conclusion, due to the increased contents of unsaturated fatty acids and decreased oxidation stability, Guizhou or other mini-pigs slaughtered at an early age may have a negative effect on meat quality.