Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Comparison Analysis of Swine Gut Microbiota between Landrace and Yorkshire at Various Growth Stages

두 돼지 종의 다양한 성장단계에 따른 장내미생물 비교분석

  • Unno, Tatsuya (Faculty of Biotechnology, College of Applied Life Sciences, SARI, Jeju National University)
  • Received : 2014.11.11
  • Accepted : 2014.11.24
  • Published : 2014.12.31
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Abstract

In this study, we conducted a next generation sequencing based microbial community analysis to investigate gut microbiota of the two commercially most available swine breeds, Yorkshire and Landrace. Bacterial 16S rRNA gene was amplified from fecal DNA using universal primer sets designed for V4 regions. Our comparison analysis of the gut microbiota of the two breeds suggested that their gut microbiota changed depending on the growth stages, while the difference between the two breeds was insignificant. However, there was a limited number of genera, the abundance of which was found to be different between the breeds. Those included the genus Xylanibacter in the Yorkshire samples, which was previously reported as a fiber digesting bacteria, likely increasing energy harvesting capacity of swine. In addition, others included opportunistic pathogens mostly found in the Yorkshire samples while the Landrace samples had significantly more prevalent Clostridium_IV species that were known to play a key role in systemic immunity of hosts. While microbial community shifts was found to be associated with growth stages, the difference between the two breeds seemed to be insignificant. However, there were several bacterial genera showing differential abundance, which may affect growth of hosts.

연구에서는 차세대염기서열분석법(Next Generation Sequencing)을 이용하여 상업적으로 농가에 가장 많이 보급되어 있는 요크셔와 랜드레이스를 포함한 두 종의 장내미생물생태 분석을 실시하였다. 박테리아의 16S rRNA 유전자는 분변샘플로부터 추출한 DNA에서 V4 지역을 증폭할 수 있도록 디자인된 유니버설 프라이머 세트를 이용하여 증폭되었다. 두 종에 대한 장내미생물생태 비교분석은 성장단계에 따라 차이를 보이는 반면, 종에 따른 차이는 거의 없다는 것을 확인하였다. 하지만, 두 종간의 장내미생물생태 내에서 특정 미생물의 수가 차이가 있다는 것을 확인하였다. 요크셔는 특히 섬유질 소화를 통해 에너지 생산률을 높여준다고 보고된 바가 있는 Xylanibacter 속(Genus)의 미생물을 많이 포함하는 것으로 나타났다. 또한, 랜드레이스는 숙주 내에서 면역에 중요한 역할을 하는 것으로 알려진 Clostridium_IV 종을 상당히 많이 포함하는 것으로 나타났으며, 반면 요크셔는 기회감염미생물들을 많이 포함하는 것으로 나타났다. 본 연구는 요크셔와 랜드레이스를 포함한 두 종간의 장내미 생물생태 비교분석을 통해 그 차이점이 종에 의한 차이보다는 성장단계에 따라 큰 차이가 있다는 것을 확인하였다. 하지만 두 종 사이에서 성장에 영향을 미칠 가능성이 있는 몇 장내미생물의 수가 차이가 있다는 것을 확인하였다.

Keywords

References

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