Transcriptome and targeted metabolome analysis of lipid profiles, nutrients compositions and volatile compounds in longissimus dorsi of different pig breeds.
IF 2.4 2区 农林科学Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
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引用次数: 0
Abstract
Objective: Improving meat quality is important for commercial production and breeding. The molecular mechanism of intramuscular fat (IMF) deposition and meat characteristics remain further study.
Methods: This study aimed to study the mechanism of IMF deposition and meat characteristics including redox potential, nutrients compositions and volatile compounds in longissimus dorsi (LD) by comparing with different pig breeds including Shanghai white (SW), Duroc x (Landrace Yorkshire) (DLY) and Laiwu (LW) pigs.
Results: Results showed that the contents of IMF, triglyceride (TG), total cholesterol (TC), and redox potential parameters were lower, while the content of MDA and activity of lactate dehydrogenase (LDH) were higher in LD of SW pigs compared with LW pigs (p<0.05). No differences were observed about these parameters between SW and DLY pigs. Also, the contents of medium-long chain fatty acids and γ-aminobutyric acid (GABA) were higher, while Asp was lower in LD of SW pigs compared with LW pigs (p<0.05). Volatile compounds results showed that 6 ketones, 4 alkenes, 11 alkanes, 2 aldehydes, 1 alcohol were increased and cholesterol was decreased in SW pigs compared with LW pigs. Transcriptome results showed that differential expressed genes involved in lipid synthesis, metabolism and transport in LD between SW and LW pigs, which were further verified by qPCR. Spearman correlation showed that HSL and Nedd4 were positively related to contents of TG and IMF, while negatively related to volatile compounds and fatty acids (p<0.05). Plin3 and Mgll were negatively related to contents of TG, IMF and cholesterol, while positively related to MDA, LDH, and volatile compounds (p<0.05). PPARA was negatively related to contents of TC and IMF, and activity of SOD, while positively related to volatile compounds (p<0.05).
Conclusion: Our study provided new insights into potential mechanisms of IMF deposition, nutrients composition and volatile compounds of muscular tissues of different pig breeds.
目的：提高肉质对商业生产和育种非常重要。肌肉内脂肪（IMF）沉积和肉质特征的分子机制仍有待进一步研究：本研究旨在通过与不同猪种（包括上海白猪（SW）、杜洛克×约克夏猪（DLY）和莱芜猪（LW））比较，研究背阔肌（LD）肌内脂肪沉积机制和肉质特征，包括氧化还原电位、营养成分和挥发性化合物：结果：结果表明，与莱芜猪相比，SW猪LD的IMF、甘油三酯（TG）、总胆固醇（TC）含量和氧化还原电位参数较低，而MDA含量和乳酸脱氢酶（LDH）活性较高（p结论）：我们的研究为了解不同猪种肌肉组织中 IMF 沉积、营养成分和挥发性化合物的潜在机制提供了新的视角。
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