Open AccessArticle
Comparison of Diplodia Tip Blight Pathogens in Spanish and North American Pine Ecosystems
by
Ana Aragonés, Tania Manzanos, Glen Stanosz, Isabel A. Munck, Rosa Raposo, Margarita Elvira-Recuenco, Mónica Berbegal, Nebai Mesanza, Denise R. Smith, Michael Simmons, Stephen Wyka and Eugenia Iturritxa
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Abstract
Diplodia tip blight is the most ubiquitous and abundant disease in Spanish
Pinus radiata plantations. The economic losses in forest stands can be very severe because of its abundance in cones and seeds together with the low genetic diversity of the host.
Pinus
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Diplodia tip blight is the most ubiquitous and abundant disease in Spanish
Pinus radiata plantations. The economic losses in forest stands can be very severe because of its abundance in cones and seeds together with the low genetic diversity of the host.
Pinus resinosa is not genetically diverse in North America either, and Diplodia shoot blight is a common disease. Disease control may require management designs to be adapted for each region. The genetic diversity of the pathogen could be an indicator of its virulence and spreading capacity. Our objective was to understand the diversity of
Diplodia spp. in Spanish plantations and to compare it with the structure of American populations to collaborate in future management guidelines. Genotypic diversity was investigated using microsatellite markers. Eight loci (SS9–SS16) were polymorphic for the 322 isolates genotyped. The results indicate that
Diplodia sapinea is the most frequent
Diplodia species present in plantations of the north of Spain and has high genetic diversity. The higher genetic diversity recorded in Spain in comparison to previous studies could be influenced by the intensity of the sampling and the evidence about the remarkable influence of the sample type.
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