Clonality and genetic variation in Amylostereum areolatum and A. chailletii from northern Europe |
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| Authors: | RIMVYDAS VASILIAUSKAS,JAN STENLID,& IBEN M. THOMSEN |
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| Affiliation: | Department of Plant Protection, Lithuanian University of Agriculture, Kaunas LT-4324, Lithuania; Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Box 7026, Uppsala S-750 07, Sweden; Danish Forest and Landscape Research Institute, Horsholm Kongevej 11, Horsholm DK-2970, Denmark; To whom correspondence should be addressed. |
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| Abstract: | Genetic variation within and between vegetative compatibility groups (VCGs) of Amylostereum areolatum (Fr.) Boid. and Amylostereum chailletii (Pers.: Fr.) Boid. isolates was investigated. DNA fingerprints were made using the M13 core sequence as a primer. A total of 53 isolates of A. areolatum and 57 isolates of A. chailletii from Lithuania, Sweden, Denmark and Great Britain were studied. In all cases isolates belonging to the same VCG showed identical DNA banding patterns, suggesting that VCGs correspond to clones. In A. areolatum the vast majority of the isolates (spread by Sirex juvencus L.) were assigned to dispersive clones, that have wide geographical distribution (i.e. the same genotypes were detected in Lithuania, Sweden and Denmark), with low genetic variation between the different clones. By contrast, A. chailletii population structure was consistent with the spread of airborne basidiospores produced by outcrossing. Only a small fraction of A. chailletii isolates studied, could be assigned to dispersal clones with a local distribution, spread by Urocerus gigas L. Overall, M13 fingerprinting detected low genetic differentiation in both species in the samples we studied. |
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| Keywords: | Amylostereum spp. arbitrary primed DNA genetic variation clones populations |
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