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Please use this identifier to cite or link to this item: https://scholars.tari.gov.tw/handle/123456789/4837
Title: Comparative and population genomic landscape of Phellinus noxius: A hypervariable fungus causing root rot in trees
Authors: Chia-Lin Chung
Tracy J. Lee
Mitsuteru Akiba
Hsin-Han Lee
Tzu-Hao Kuo
Dang Liu
Huei-Mien Ke
Toshiro Yokoi
Marylette B. Roa
Mei-Yeh J. Lu
Ya-Yun Chang
Pao-Jen Ann
Jyh-Nong Tsai 
Chien-Yu Chen
Shean-Shong Tzean
Yuko Ota
Tsutomu Hattori
Norio Sahashi
Ruey-Fen Liou
Taisei Kikuchi
Isheng J. Tsai
Keywords: comparative genomics;fungi;microbial biology;population genomics
Issue Date: Nov-2017
Publisher: Wiley
Journal Volume: 26
Journal Issue: 22
Start page/Pages: 6301-6316
Source: Molecular Ecology 
Abstract: 
The order Hymenochaetales of white rot fungi contain some of the most aggressive wood decayers causing tree deaths around the world. Despite their ecological importance and the impact of diseases they cause, little is known about the evolution and transmission patterns of these pathogens. Here, we sequenced and undertook comparative genomic analyses of Hymenochaetales genomes using brown root rot fungus Phellinus noxius, wood-decomposing fungus Phellinus lamaensis, laminated root rot fungus Phellinus sulphurascens and trunk pathogen Porodaedalea pini. Many gene families of lignin-degrading enzymes were identified from these fungi, reflecting their ability as white rot fungi. Comparing against distant fungi highlighted the expansion of 1,3-beta-glucan synthases in P.noxius, which may account for its fast-growing attribute. We identified 13 linkage groups conserved within Agaricomycetes, suggesting the evolution of stable karyotypes. We determined that P.noxius has a bipolar heterothallic mating system, with unusual highly expanded similar to 60kb A locus as a result of accumulating gene transposition. We investigated the population genomics of 60 P.noxius isolates across multiple islands of the Asia Pacific region. Whole-genome sequencing showed this multinucleate species contains abundant poly-allelic single nucleotide polymorphisms with atypical allele frequencies. Different patterns of intra-isolate polymorphism reflect mono-/heterokaryotic states which are both prevalent in nature. We have shown two genetically separated lineages with one spanning across many islands despite the geographical barriers. Both populations possess extraordinary genetic diversity and show contrasting evolutionary scenarios. These results provide a framework to further investigate the genetic basis underlying the fitness and virulence of white rot fungi.
URI: https://scholars.tari.gov.tw/handle/123456789/4837
https://onlinelibrary.wiley.com/doi/10.1111/mec.14359
ISSN: 0962-1083
DOI: 10.1111/mec.14359
Appears in Collections:SCI期刊

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