Effects of Dietary Yeast β-Glucan Supplementation on Meat Quality, Antioxidant Capacity and Gut Microbiota of Finishing Pigs
Yeast β-glucan is a natural antioxidant and has been reported to improve growth performance of piglets, but its application in improving pork quality is limited. This study investigated the effects of dietary yeast β-glucan supplementation on meat quality, antioxidant capacity and gut microbiota of...
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| Main Authors: | , , , , , , , |
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| Format: | Book |
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MDPI AG,
2022-07-01T00:00:00Z.
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| Summary: | Yeast β-glucan is a natural antioxidant and has been reported to improve growth performance of piglets, but its application in improving pork quality is limited. This study investigated the effects of dietary yeast β-glucan supplementation on meat quality, antioxidant capacity and gut microbiota of finishing pigs. In a 40-day experiment, ninety finishing pigs (Duroc × Landrace × Yorkshire, 70.47 ± 0.04 kg) were randomly allocated into five treatments including a basal diet supplemented with 0, 50, 100, 200 and 400 mg/kg yeast β-glucan. Results showed that yeast β-glucan significantly increased pH<sub>45 min</sub> (linear and quadratic, <i>p</i> < 0.01) and a*<sub>45 min</sub> (linear, <i>p</i> < 0.05), and reduced cooking loss (linear, <i>p</i> < 0.05) and drip loss (quadratic, <i>p</i> < 0.05) of meat in finishing pigs. Importantly, the 200 mg/kg group exhibited the highest values of pH<sub>45 min</sub> (<i>p</i> < 0.01) and the lowest values of drip loss (<i>p</i> < 0.05), accompanied by a decreased lactate content (<i>p</i> < 0.05) and glycolytic potential (<i>p</i> < 0.05). Dietary supplementation of 200 mg/kg yeast β-glucan markedly increased catalase (CAT) (<i>p</i> < 0.05), superoxide dismutase (SOD) (<i>p</i> < 0.05) and total antioxidant capacity (T-AOC) (<i>p</i> < 0.01) activities in skeletal muscle. Moreover, <i>WPS-2</i> abundance was decreased significantly in colonic digesta by 200 mg/kg yeast β-glucan and exhibited a positive association with muscle lactate content and drip loss. Together, dietary 200 mg/kg yeast β-glucan supplementation effectively improved pH value and the water-holding capacity of fresh meat through reducing muscle postmortem glycolysis, increasing antioxidant capacity and altering the gut microbiota composition of finishing pigs. |
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| Item Description: | 10.3390/antiox11071340 2076-3921 |