2019-03-01
Abstract
The gut microbiota has an important role in animal health and performance, but its contribution is dif?cult to determine, in particular given the effects of host genetic factors. Here, whole-genome sequencing of the hosts and 16S rRNA gene sequencing of the microbiota were performed to separate the effects between host genetics and the microbiota in the duodenum, jejunum, ileum, caecum and faeces on fat deposition in 206 yellow broilers reared under identical conditions. Despite the notable spatial variation in the diversity, composition and potential function of the gut microbiota, host genetics exerted limited effects on the gut microbial community. The duodenal and caecal microbiota made greater contributions to fat deposition and could separately account for 24% and 21% of the variance in the abdominal fat mass after correcting for host genetic effects. We further identi?ed two caecal microbial taxa, Methanobrevibacter and Mucispirillum schaedleri, which were signi?cantly correlated with fat deposition. Chickens with a lower Methanobrevibacter abundance had signi?cantly lower abdominal fat content than those with a higher abundance of Methanobrevibacter (35.51 vs. 55.59 g), and the body weights of these chickens did not notably differ. Chickens with a higher M. schaedleri abundance exhibited lowerabdominal fat accumulation (39.88 vs. 55.06 g) and body weight (2.23 vs. 2.41 kg) than those with a lower abundance of this species. These ?ndings may aid the development of strategies for altering the gut microbiota to control fat deposition during broiler production.
Text link : https://www.nature.com/articles/s41396-019-0367-2
