Phylogenetic relationships of Japanese species of Heterobasidion--H. annosum sensu lato and an undetermined Heterobasidion sp.

Ota, Yuko; Tokuda, Sawako; Buchanan, Peter; Hattori, Tsutomu

doi:10.3852/mycologia.98.5.717

Cited by 17 publications

(17 citation statements)

References 18 publications

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“…Phylogenetic separation can precede reproductive isolation (Dettman et al 2003). In the case of Heterobasidion, phylogeny based on gene sequences does not support any structure within H. parviporum, but clearly supports a divergence between H. parviporum and H. abietinum (Johannesson and Stenlid 2003;Ota et al 2006). The results of our study highlight the higher resolution of phylogenetic species recognition as opposed to the biological species recognition (based on mating tests) for identifying reproductively isolated units, since the latter could be biased by former sympatric or allopatric conditions.…”

Section: Discussioncontrasting

confidence: 56%

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Gene flow and inter-sterility between allopatric and sympatric populations of Heterobasidion abietinum and H. parviporum in Europe

2010

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The tree pathogenic fungi Heterobasidion parviporum and H. abietinum are recently described sibling species that show marked host preference for Picea abies and Abies alba, respectively. H. parviporum shows a higher reproductive character displacement (i.e. higher intersterility) towards H. abietinum in sympatry than in allopatry. We inspected whether this pattern was also present in H. abietinum by studying the inter-sterility and gene flow amongst sympatric central European populations of H. abietinum and H. parviporum, and two isolated allopatric populations, Pyrenean H. abietinum and Scandinavian H. parviporum. Inter-and intra-specific fixation index values were calculated from DNA sequence data of the GST-1 locus and four microsatellite loci. Present allopatric and sympatric populations of H. abietinum were equally inter-sterile towards H. parviporum, not suggestive of relaxed reinforcement. Several hypotheses explaining the observed pattern are presented. Genetic differentiation was observed between H. abietinum in the Pyrenees and in the Alps, suggesting geographical structure of H. abietinum in Europe.

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Section: Discussioncontrasting

confidence: 56%

“…2003). In the case of Heterobasidion , phylogeny based on gene sequences does not support any structure within H. parviporum , but clearly supports a divergence between H. parviporum and H. abietinum (Johannesson and Stenlid 2003; Ota et al. 2006).…”

Section: Discussionmentioning

confidence: 79%

Gene flow and inter-sterility between allopatric and sympatric populations of Heterobasidion abietinum and H. parviporum in Europe

2010

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“…This suggests that the Palaearctic–North American differentiation took place earlier than 6 Ma because this is the time when the Japanese islands were separated from the Asian mainland. Judging from the work of Ota et al. (2006) and Tokuda et al.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary history of the conifer root rot fungus Heterobasidion annosum sensu lato

2010

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We investigated two hypotheses for the origin of the root rot fungus Heterobasidion annosum species complex: (i) that geology has been an important factor for the speciation (ii) that co-evolutionary processes with the hosts drove the divergence of the pathogen species. The H. annosum species complex consists of five species: three occur in Europe, H. annosum s.s., Heterobasidion parviporum and Heterobasidion abietinum, and two in North America, Heterobasidion irregulare and Heterobasidion occidentale; all with different but partially overlapping host preferences. The evolution of the H. annosum species complex was studied using six partially sequenced genes, between 10 and 30 individuals of each species were analysed. Neighbour-joining trees were constructed for each gene, and a Bayesian tree was built for the combined data set. In addition, haplotype networks were constructed to illustrate the species relationships. For three of the genes, H. parviporum and H. abietinum share haplotypes supporting recent divergence and/or possible gene flow. We propose that the H. annosum species complex originated in Laurasia and that the H. annosum s.s./H. irregulare and H. parviporum/H. abietinum/H. occidentale ancestral species emerged between 45 and 60 Ma in the Palaearctic, well after the radiation of the host genera. Our data imply that H. irregulare and H. occidentale were colonizing North America via different routes. In conclusion, plate tectonics are likely to have been the main factor influencing Heterobasidion speciation and biogeography.

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“…immigrated more recently to the North American continent than Eurasian continent, possibly after the last ice age (Otrosina and Chase 1993). Japanese H. parviporum has greater sequence diversity than the European population and is considered to be older (Ota et al. 2006).…”

Section: Discussionmentioning

confidence: 99%

“…In east Asia, H. parviporum has been recorded from temperate areas of northern China to the Chinese eastern Himalayas, and subalpine areas in the northern and central parts of Japan (Dai and Korhonen 1999; Dai et al. 2003, 2006, 2007a; Ota et al. 2006; Tokuda et al.…”

Section: Introductionmentioning

confidence: 99%

The distribution of closely related large genets of Heterobasidion parviporum in a Todo fir (Abies sachalinensis) stand in Hokkaido, Japan

et al. 2011

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The distribution of genets of a root and butt rot pathogen Heterobasidion parviporum was studied in a 68-year-old Abies sachalinensis plantation in Japan. A total of 33 pure cultures of H. parviporum were isolated from diseased Todo fir stumps after clear-felling. Individual genets of the fungus were identified by three different methods: somatic incompatibility test, random amplified polymorphic DNA, and DNA microsatellite analyses. The combined results of the three analyses identified at least eight genets within a 60 · 100 m plot. One genet, consisting of only one isolate, was genetically differentiated from the other genets by all three methods; the other 32 isolates, however, were grouped with minor discrepancies, into seven genetically close genets. The genetic differentiation was lower than that recorded previously in Europe. A single genet infected 1-15 trees in the plot. The longest distance of the two most isolated trees of a single genet was 51 m. The close genetic relationship between genets and their large sizes suggest that basidiospores from restricted sources (just a few fruiting bodies) infected the site before establishment of the present Todo fir stand and that the disease has spread mainly by vegetative growth of the mycelia through root contact. Absence of fruiting bodies of the fungus in the study plot also suggests the greater importance of vegetative growth than spore dispersal for the spread of this fungus.

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Phylogenetic relationships of Japanese species of Heterobasidion--H. annosum sensu lato and an undetermined Heterobasidion sp.

Cited by 17 publications

References 18 publications

Gene flow and inter-sterility between allopatric and sympatric populations of Heterobasidion abietinum and H. parviporum in Europe

Gene flow and inter-sterility between allopatric and sympatric populations of Heterobasidion abietinum and H. parviporum in Europe

Evolutionary history of the conifer root rot fungus Heterobasidion annosum sensu lato

The distribution of closely related large genets of Heterobasidion parviporum in a Todo fir (Abies sachalinensis) stand in Hokkaido, Japan

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