Abstract
The phylogenetic relationships of Lactarius volemus and its relatives were investigated using the nucleotide sequences of the nuclear-encoded large subunit ribosomal DNA (LSU rDNA). Thirty-six sequences from L. volemus, L. corrugis, and L. hygrophoroides, including three sequences obtained from the GenBank database, were used in this study. Samples studied were divided into four major subclades (A–D) in both neighbor-joining (NJ) and maximum-parsimony (MP) trees. Lactarius volemus and L. corrugis formed one large clade in both NJ and MP trees (bootstrap value, 100%), which was divided into three subclades (A–C). Subclade A included three clusters of L. volemus strains, i.e., velvet, red, and Chinese types. Subclade B included the common and red types of L. corrugis. Subclade C included the common and yellow types of L. volemus. Subclade D included only one type of L. hygrophoroides. An analysis of the fatty acid composition supported the divisions found in the molecular analysis. Analyses of nucleotide sequence, fatty acid composition, morphological characteristics, and the taste of the fruiting bodies all led us to conclude that the common, velvet, red, and Chinese types of L. volemus, and the common and red types of L. corrugis, may each belong to different species, subspecies, or varieties. Further studies with more material from a wide range of regions are required to conduct taxonomic revision of these types. The LSU rDNA region may be a useful tool to investigate phylogenetic relationships within the section Dulces of the genus Lactarius.
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Shimono, Y., Hiroi, M., Iwase, K. et al. Molecular phylogeny of Lactarius volemus and its allies inferred from the nucleotide sequences of nuclear large subunit rDNA. Mycoscience 48, 152–159 (2007). https://doi.org/10.1007/s10267-006-0346-0
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DOI: https://doi.org/10.1007/s10267-006-0346-0