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Genetic variation in Polish strains of Gremmeniella abietina

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Thirty-nine strains of Gremmeniella abietina were isolated between 1980 and 2005 from diseased or symptomless Pinus sylvestris and Pinus nigra, or sporadically Pinus jeffreyi and Pinus armandii from four regions of Poland with varying climatic conditions. Thirty-five of the strains were genetically similar to the G. abietina A type found in Scandinavia, whereas four were similar to the B type. On the basis of random amplified microsatellite markers, very high intrapopulation and interpopulation genetic variation was detected among the strains. The average value of the Jaccard genetic similarity coefficients among strains was 0.56 for A type and 0.47 for B type, and the monomorphic loci partition was small, at 14% of all analysed loci for the A type. The degree of genetic variation of the fungal strains within each of the four regions was similar, showing no significant differences. The Jaccard coefficient for the strains isolated from P. sylvestris and P. nigra differed significantly, at 0.57 and 0.54 respectively. The genetic distance among A type strains from the investigated regions, expressed using Nei’s coefficient, was not correlated with geographic distance; however, it was highly dependent on elevation (correlation coefficient r = 0.92).
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Document Type: Research Article

Affiliations: (for correspondence), Email: [email protected]

Publication date: 01 June 2008

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