ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (8): 1661-1673.doi: 10.11843/j.issn.0366-6964.2018.08.011

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Effect of Selenium Yeast in Containing PUFAs Dietary on Fatty Acid Composition and Antioxidant Capacity of Hu Lambs

FAN Yi-xuan1, DENG Kai-ping1, TANTAI Wen-jing1, HUANG Xin-ai2, WANG Feng1*, CHEN Ming2*   

  1. 1. Institute of Goats and Sheep Science, Nanjing Agricultural University, Nanjing 210095, China;
    2. Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, China
  • Received:2017-10-13 Online:2018-08-23 Published:2018-08-23

Abstract:

The aim of this study was to examine the effect of selenium yeast in containing polyunsaturated fatty acids dietary(supplemented perilla frutescens seed) on fatty acid composition and antioxidant capacity in muscle and liver of Hu lambs. Forty-five lambs of 3 months old with the body weight of (23.02±1.36) kg were selected and randomly divided into 3 groups:basic ration group(C), C+10% perilla frutescens seed group (PFS) and C+PFS+yeast selenium group(PFS+Se). The duration of preliminary experiment was 10 days and the duration of the formal experiment was 60 days. Growth performance was measured at the beginning and end of the trial and blood samples were collected for biochemical analysis. Slaughter test was performed at the end of the trail to collect longissimus dorsi muscle and liver samples for measuring the fatty acid composition, antioxidant enzyme activity and antioxidant related genes expression levels. The results showed that:1) There was no significant difference in growth performance and slaughter performance among different treatments (P>0.05). 2) The crude fat content in longissimus dorsi muscle of Hu sheep in the PFS and PFS+Se groups significantly increased (P<0.05), but there was no significantly difference in the content of mineral elements such as Fe, Cu, Na, K and Mg among different treatments (P>0.05). 3) The content of n-3 polyunsaturated fatty acid in liver and longissimus dorsi muscle in PFS group were significantly increased (P<0.05), and the values of n-6/n-3 in muscle and liver was significantly lower compared with the C group (P<0.05). 4) The CAT activity and T-AOC in the serum in PFS+Se group were significantly increased (P<0.05), the content of MDA in liver was significantly decreased (P<0.05), and the expressions of CAT and GPX in liver were significantly increased compared with C group (P<0.05). The above results show that adding selenium yeast in PUFAs dietary can improve the antioxidant capacity of Hu sheep, but it can not promote the PUFA deposition. Therefore, selenium yeast may not be the most effective way to promote the PUFA deposition in Hu sheep fed with perilla frutescens seed diet, and further work is needed to explore the effective antioxidants.

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