ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (12): 2652-2663.doi: 10.11843/j.issn.0366-6964.2018.12.014

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Differences in Rumen Microbes of Goats with Different Phosphorus True Digestibility

JIN Lei, WANG Li-zhi*, GU Ke, WANG Zhi-sheng, XUE Bai, PENG Quan-hui   

  1. Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
  • Received:2018-04-23 Online:2018-12-23 Published:2018-12-23

Abstract:

The objective of this study was to compare the structure and composition of rumen microorganism of goats with different true digestibility of feed phosphorus using Illumina MiSeq sequencing technology. Twenty-eight Nubian Black goats, aged 10 months on average and weighed (24.25±2.47) kg, were selected as the experimental animals. After two digestion tests, the content of phosphorus in feed and feces was determined, and the true digestibility of phosphorus in all goat feed was calculated by differential method. Among them, 6 goats with high phosphorus true digestibility were selected as HP group and 6 goats with low phosphorus true digestibility as LP group. Rumen fluid from each goat in HP and LP groups was collected and then total genomic DNA was extracted. High variable region of bacterial 16S rRNA gene was amplified by PCR using bacterial universal primers. The amplicon sequence data was analyzed by the Illumina MiSeq sequencing platform, and bioinformatics analysis was performed using QⅡME software. The results showed that:1) The content of phosphorus in blood of goats in HP group was significantly higher than that in LP group (P<0.05). 2) At the phylum level, Firmicutes and Bacteroidetes were the dominant bacteria in the rumen microorganisms of goats in the two groups; 3)At the genus level, the relative abundances of 10 genus were significantly different between the two groups (P<0.05). Only the relative abundances of Prevotella, Desulfovibrio and Selenomonas in HP group were significantly higher than that in LP group(P<0.05), but the relative abundances of Ruminococcaceae_UCG-010, Ruminococcus_2, Ruminococcaceae_NK4A214_group, Saccharofermentans, Ruminococcaceae_UCG-014, Butyrivibrio and Clostridium were significantly lower in HP group than that in LP group (P<0.05). The relative abundance of rumen microorganisms was significantly correlated with the phosphorus true digestibility in goats. There are significant differences in structure and composition of rumens microorganisms among goats with different phosphorus true digestibility.

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