Integrated LC/MS-based lipidomics and transcriptomics analyses revealed lipid composition heterogeneity between pectoralis intramuscular fat and abdominal fat and its regulatory mechanism in chicken

•Untargeted lipidomic profile of chicken intramuscular and abdominal fat was performed.•Differential lipid molecules exhibited the definite alteration of lipid composition.•The major differential lipids in intramuscular fat and abdominal fat of chicken were identified.•Key genes regulating heterogeneous lipid deposition in pectoralis and abdominal fat were discovered.