Effects of Two Feeding Patterns on umami substances and related genes of Sunit Sheep Meat

Abstract

Abstract: The objective of this study was to investigate the difference in taste characteristics, umami substances and umami related genes of Longissimus dorsi, Biceps femoris and Triceps brachii muscles from Sunit sheep subjected to two feeding patterns (grazed and concentrated). Sunit sheep were slaughtered at 12 months of age for the collection of muscle samples. The results showed that umami and saltiness in grazed were higher than concentrated, while bitterness and astringency were lower than concentrated. Among the umami substances, the IMP and INO content in grazed was higher than concentrated. Feeding patterns had no significant effect on HPY, however HPY were all highest in longissimus muscle (P<0.05). The expression of AMPD1 from grazed sheep were significantly higher than the concentrated in Longissimus dorsi (P>0.05), the expression of AMPD1 from grazed sheep were significantly higher than the concentrated in Biceps femoris (P＜0.05). In grazed conditions, the expression of AMPD1 had greatly significant positive correlated with ADSL (P<0.01). Correlation analysis showed that IMP was positively correlated with AMPD1 (P<0.01), ATIC (P<0.05) in grazed sheep; IMP was positively correlated with AMPD1 (P<0.05) in concentrated sheep. The correlation results confirmed that when the expression level of IMP-regulated genes is high, The IMP content also increases.

Key words: Feeding patterns, Sunit sheep, taste characteristics, umami substances, umami related genes

CLC Number:

TS251.1

Yu-Long LUO. Effects of Two Feeding Patterns on umami substances and related genes of Sunit Sheep Meat[J]. FOOD SCIENCE, 0, (): 0-0.

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