ITS 영역의 염기서열을 이용한 먹물버섯류 및 주름버섯 유사 복균류와의 계통학적 유연관계

Phylogenetic Relationships of Coprinoid Taxa and an Agaric-like Gastroid Taxon Based on the Sequences of Internal Transcribed Spacer (ITS) Regions

  • 박동석 (농업과학기술원 분자유전과) ;
  • 고승주 (농업과학기술원 분자유전과) ;
  • 류진창 (농업과학기술원 분자유전과)
  • Park, Dong-Suk (Division of Molecular Genetics, National Institute of Agricultural Science and Technology) ;
  • Go, Seung-Joo (Division of Molecular Genetics, National Institute of Agricultural Science and Technology) ;
  • Ryu, Jin-Chang (Division of Molecular Genetics, National Institute of Agricultural Science and Technology)
  • 발행 : 1999.12.30

초록

먹물버섯류 및 주름버섯 유사 균류의 계통학적 유연 관계를 분석하기 위해 계통분류학적 정보를 지니고 있는 rDNA의 ITS(17S, 5.8S, 25S일부 포함)의 염기서열을 밝히고 이들 자료를 근거로 하여 형태적 분류 체계와 비교분석을 하였다. 이번 조사된 종은 총 14종으로서 먹물버섯속 균류 8종, 눈물버섯속 균류 1종, 소똥버섯과 2종, 주름버섯과 1종, 독청버섯과 1종, 복군류 1종이 포함되었다. 종간 염기서열 상동성은 $38.7{\sim}77.2%$였다. 조사된 균류는 크게 4개의 그룹을 형성하였다. 그룹 I에 C. micaceus, C. radians, C. disseminatus, Psathyrella candolleana 등이 포함되었고, 그룹 II에는 C. cinereus, C. echinosporus, C. rhizophorus, C. atramentarius이 조사되었다. 한편, 먹물버섯속 균류의 기준종인 C. comatus는 다른 먹물버섯 그룹들과 분지의 신뢰도가 전혀 없는 것으로 조사되었고 그룹 III에서 주름버섯 유사 복균류인 Podaxis pistillaris 및 신령버섯 Agaricus blazei와의 분지 신뢰도는 87과, 57을 각각 나타내었다. 한편, 눈물버섯속 균류는 그룹 II에 포함되는 결과를 나타내어 형태적 분류체계와 상이한 결과를 도출하였고, 주름버섯 유사복균류인 Podaxis pistillaris는 다른 기타 주름버섯목 균류보다도 C. comatus와 더 밀접한 유연 관계를 나타내어 이들 주름버섯 유사 복균류(secotioid taxa)는 주름버섯목 균류에서 파생된 것임을 확인할 수 있었다. 기준 종으로 알려진 C. comatus는 발생학적 측면에서 다른 절에 있는 먹물버섯 균류와 다른 점이 있음을 이번 조사에서 확인할 수 있었으며 먹물버섯속(屬)의 기준 종은 재 설정되어 할 것으로 사료되었다. 또한 기존의 분류학자들이 주장해온 단일 진화론은 조사된 여러 결과와 비교해 볼 때 적어도 paraphyletic이 거나 polyphyletic일 가능성은 높은 것으로 확인되었다.

The phylogenetic relationships of black-spored basidioid taxa (mainly coprinoid taxa) and an agaric-like gastroid taxon were studied. The sequences of internal transcribed spacer regions (ITS) partially including 17S, 25S and 5.8S from 14 species (Coprinus comatus, C. atramentarius, C. micaceus, C. cinereus, C. disseminatus, C. rhizophorus, C. radians, C. echinosporus, Psathyrella candolleana, Podaxis pistillaris, Conocybe lactea, Bolbitius demangei, Agaricus balzei, and Stropharia rugosoannulata) were compared. The reciprocal homologies of ITS sequences among these species were in the range of $38.7{\sim}77.2%$. Black-spored taxa were classified into four clusters. Cluster I comprised C. micaceus, C. radians, and C. disseminata. Cluster II is consisted of C. cinereus, C. echinosporus, C. rhizophorus, and C. atramentarius. On the other hand, C. comatus is in cluster III with Agaricus balzei and Podaxis pistillaris even though this species is belonging to the section Coprinus in morphological aspect. Psathyrelloid taxon is included in cluster II. The question of the origin of secotioid (agaric-like) fungi has been taken, though largely on theoritical suggestions as to whether gastroid taxa give rise to agarics with secotioid taxa as intermediates or whether secotioid taxa are evolutionary novelities arising from many distinct groups of agarics. In this relationship, it was shown that secotioid taxon evolved from within agaric species.

키워드

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