How well do ITS rDNA sequences differentiate species of true morels (Morchella)?
Du, Xi-Hui10,11; Zhao, Qi10,11; Yang, Zhu L.10,11; Hansen, Karen9; Taskin, Hatira8; Buyukalaca, Saadet8; Dewsbury, Damon6,7; Moncalvo, Jean-Marc6,7; Douhan, Greg W.5; Robert, Vincent A. R. G.4; Crous, Pedro W.4; Rehner, Stephen A.3; Rooney, Alejandro P.2; Sink, Stacy1; O'Donnell, Kerry1
Source PublicationMYCOLOGIA
AbstractArguably more mycophiles hunt true morels (Morchella) during their brief fruiting season each spring in the northern hemisphere than any other wild edible fungus. Concerns about overharvesting by individual collectors and commercial enterprises make it essential that science-based management practices and conservation policies are developed to ensure the sustainability of commercial harvests and to protect and preserve morel species diversity. Therefore, the primary objectives of the present study were to: (i) investigate the utility of the ITS rDNA locus for identifying Morchella species, using phylogenetic species previously inferred from multilocus DNA sequence data as a reference; and (ii) clarify insufficiently identified sequences and determine whether the named sequences in GenBank were identified correctly. To this end, we generated 553 Morchella ITS rDNA sequences and downloaded 312 additional ones generated by other researchers from GenBank using emerencia and analyzed them phylogenetically. Three major findings emerged: (i) ITS rDNA sequences were useful in identifying 48/62 (77.4%) of the known phylospecies; however, they failed to identify 12 of the 22 species within the species-rich Elata Subclade and two closely related species in the Esculenta Clacle; (ii) at least 66% of the named Morchella sequences in GenBank are misidentified; and (iii) ITS rDNA sequences of up to six putatively novel Morchella species were represented in GenBank. Recognizing the need for a dedicated Web-accessible reference database to facilitate the rapid identification of known and novel species, we constructed Morchella MLST (, which can be queried with ITS rDNA sequences and those of the four other genes used in our prior multilocus molecular systematic studies of this charismatic genus.
KeywordAscomycota Biodiversity Biogeography Emerencia Gcpsr Genbank Phylogeny Species Limits
Indexed BySCI
WOS IDWOS:000312361100009
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Document Type期刊论文
Affiliation1.USDA ARS, Bacterial Foodborne Pathogens & Mycol Res Unit, Natl Ctr Agr Utilizat Res, Peoria, IL 61604 USA
2.USDA ARS, Crop Bioprotect Res Unit, Natl Ctr Agr Utilizat Res, Peoria, IL 61604 USA
3.USDA ARS, Systemat Mycol & Microbiol Lab, Beltsville, MD 20705 USA
4.CBS KNAW Fungal Biodivers Ctr, Utrecht, Netherlands
5.Univ Calif Riverside, Dept Plant Pathol & Microbiol, Riverside, CA 92521 USA
6.Royal Ontario Museum, Dept Nat Hist, Toronto, ON M5S 2C6, Canada
7.Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON M5S 2C6, Canada
8.Cukurova Univ, Fac Agr, Dept Hort, TR-01330 Adana, Turkey
9.Swedish Museum Nat Hist, SE-10405 Stockholm, Sweden
10.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
11.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650201, Yunnan Province, Peoples R China
Recommended Citation
GB/T 7714
Du, Xi-Hui,Zhao, Qi,Yang, Zhu L.,et al. How well do ITS rDNA sequences differentiate species of true morels (Morchella)?[J]. MYCOLOGIA,2012,104(6):1351-1368.
APA Du, Xi-Hui.,Zhao, Qi.,Yang, Zhu L..,Hansen, Karen.,Taskin, Hatira.,...&O'Donnell, Kerry.(2012).How well do ITS rDNA sequences differentiate species of true morels (Morchella)?.MYCOLOGIA,104(6),1351-1368.
MLA Du, Xi-Hui,et al."How well do ITS rDNA sequences differentiate species of true morels (Morchella)?".MYCOLOGIA 104.6(2012):1351-1368.
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