Journal of Mushroom (한국버섯학회지)

The Korean Society of Mushroom Science (한국버섯학회)
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Characterization of simple sequence repeats in the Pleurotus ostreatus cultivars, 'Heuktari' and 'Miso'

느타리버섯 품종 '흑타리'와 '미소'의 초위성체 특성구명

  • Park, Bokyung (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Ha, Byeong Seok (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Kim, Min Keun (Gyeongsangnam-do Agricultural Research and Extension Services) ;
  • Lee, Byungjoo (Chungcheongnam-do Agricultural Research & Extension Services) ;
  • Choi, Jong In (Mushroom Research Institute, GARES) ;
  • Ryu, Jae-San (Gyeongsangnam-do Agricultural Research and Extension Services)
  • Received : 2016.12.05
  • Accepted : 2016.12.16
  • Published : 2016.12.31
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Abstract

Simple sequence repeats (SSR), also referred to "microsatellites" consist of tandemly repeated short DNA sequence motifs and have been applied in various marker-based studies. SSRs were isolated and characterized from 'Heuktari' and 'Miso', which are major oyster mushroom cultivars in Korea, by genome sequencing and bioinformatic analysis. The genome sizes of 'Heuktari' and 'Miso' were estimated to be 40.8 and 40.3 Mb, respectively, which are larger than those of other P. ostreatus species (PC9 and PC10) and smaller than those of P. eryngii (KNR2312P5). In total, 949 and 968 SSRs were found in the 'Heuktari' and 'Miso' genomes, respectively. Comparative analysis of five mushrooms including P. ostreatus var. florida (PC9 and PC15) and P. eryngii revealed that the number of SSRs in 'Heuktari' and 'Miso' were the highest among them. All mushrooms studied showed similar SSR distribution patterns. Tri-, hexa-, and octanucleotide motifs accounted for the top three fractions of all SSRs.

SSR은 병렬적으로 반복되는 작은 DNA서열을 말하며, 다양한 마커 기반 연구에 활용되고 있다. 국내의 주요 느타리품종인 '흑타리'와 '미소'의 유전체를 Pacbio를 이용하여 해독하였고 이 서열 정보에서 생물정보학을 이용하여 SSR을 분리하여 특성구명을 하였다. '흑타리'와 '미소' 유래 단핵균사의 유전체의 크기는 각각 40.8 Mbp와 40.3 Mbp로 밝혀졌고, 이는 사철느타리의 단핵균사 PC9과 PC15보다 컸으나, 큰느타리보다는 작았다. 총 949개와 968개의 SSR이 '흑타리'와 '미소'의 유전체 분석을 통하여 각각 검출되었다. 5개의 느타리류 유전체의 SSR 분포와 특징을 비교분석한 결과 흑타리와 미소의 SSR 갯수가 가장 많았으며, 이들의 반복서열의 분포는 다른 느타리류와 비슷한 경향을 보였다. 3-mers, 6-mers와 8-mers가 가장 발견빈도가 높은 패턴이었다.

Keywords

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