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• W3091340122 endingPage "102182" @default.
• W3091340122 startingPage "102182" @default.
• W3091340122 abstract "<h2>Abstract</h2> Supplementation of n-3 fatty acids to poultry diets is widely acknowledged for its role in enhancing poultry products, however, little is known about the compositional responses of gut microbial communities to type and dosage of these supplements. Here, we compared the effects of n-3 polyunsaturated fatty acids (PUFA), supplied as alpha-linolenic acid (ALA) or docosahexaenoic acid (DHA), on the composition of bacterial communities in ceca of laying hens. Corn-soybean basal diets were supplemented with either flaxseed oil (FO, ALA-rich) or marine algal biomass (MA, DHA-rich), and each supplied 0.20 and 0.60% of total n-3 PUFA in the diet. Lohmann LSL-Classic laying hens (<i>n</i> = 10/treatment) were randomly allocated to one of the 4 diets. After 8 weeks of feeding, blood, liver and cecal digesta samples were obtained for plasma glucose, fatty acids, and short chain fatty acids analyses, respectively. The gut bacterial communities were characterized using genomic DNA extracted from cecal contents, whereby the V3-V4 hypervariable region of the 16S rRNA gene was sequenced using the Illumina Miseq® platform. <i>Firmicutes</i> and <i>Bacteroidetes</i> were the predominant phyla in both the FO- and MA-fed groups. The relative abundance of <i>Tenericutes</i>, often associated with immunomodulation, was relatively higher (<i>P</i><0.0001) in the FO than MA group. Although the relative abundance of <i>Bacteroides</i> was greater for the FO- than the MA-fed group, this genus was negatively correlated (<i>P</i><0.05) with total n-3 PUFA in the liver at higher dosages of both FO- and MA-fed hens. Higher dose of FO (0.60%) and both dosages of MA (0.20 and 0.60%) substantially enriched several members of <i>Firmicutes</i> (e.g., <i>Faecalibacterium, Clostridium</i> and <i>Ruminococcus</i>) which are known to produce butyrate. Moreover, co-occurrence network analysis revealed that, in the FO 0.60- and MA 0.20-fed hens, <i>Ruminococcaceae</i> was the most influential taxon accounting for about 31% of the network complexity. These findings demonstrate that supplementation of different type and level of n-3 PUFA in hens′ diets could enrich microbial communities with potential role in lipid metabolism and health." @default.
• W3091340122 created "2020-10-08" @default.
• W3091340122 creator A5016891660 @default.
• W3091340122 creator A5044577512 @default.
• W3091340122 creator A5063632874 @default.
• W3091340122 creator A5070657715 @default.
• W3091340122 creator A5003622254 @default.
• W3091340122 date "2020-11-01" @default.
• W3091340122 modified "2023-10-03" @default.
• W3091340122 title "Effect of dietary n-3 polyunsaturated fatty acids on the composition of cecal microbiome of Lohmann hens" @default.
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