期刊
FUNGAL BIOLOGY
卷 121, 期 3, 页码 212-221出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.funbio.2016.11.007
关键词
Gene duplication; Comparative mitochondrial; genomics; Rugulosin; Helotiales
类别
资金
- NSERC [CRDPJ 421782-11]
- Environment and Climate Change Canada Science Horizons Program EYC internship
- Mycological Society of America Martin-Baker Research Award
- 1000 Fungal Genomes Project
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
Despite the recent surge in mitochondrial (mt) genome sequencing, Kingdom Fungi remains underrepresented with respect to mtDNA. We describe the mt genome of the conifer needle endophyte, Phialocephala scopiformis DAOMC 229536 (Helotiales, Ascomycota). This strain is of interest to the Canadian forestry industry as it produces the anti-insectan compound rugulosin. Sequence was obtained from whole genome shotgun sequencing. Comparison to the only other published Phialocephala mt genome, Phialocephala subalpina, indicates that the suite of common mt genes - coxl-3, cob, nadl-6 and 4L, atp6, 8 and 9, as well as rrnL and rrnS - has retained an identical order. Nad4L remains one of the most conserved mitochondrial genes within Phialocephala. Members of the closely related Phialocephala fortinii s.l. Acephala appalanata species complex (PAC) share too much sequence similarity to properly resolve lineages using ITS barcoding alone. Using P. scopiformis sequence as an outgroup, we determined ancestral gene states that help confirm clades within Phialocephala. Our results show: (1) the complete mt genome of P. scopiformis, representing the 10th complete mt genome for the order Helotiales (containing >3800 species), and (2) how large-scale genomic patterns, such as mitochondrial gene order, can be used to confirm lineages within fungal species complexes. (C) 2016 British Mycological Society. Published by Elsevier Ltd. All rights reserved.
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