Research article - Peer-reviewed, 2021
Relationship and genetic structure among autoecious and heteroecious populations of Cronartium pini in northern Fennoscandia
Samils, Berit; Kaitera, Juha; Persson, Torgny; Stenlid, Jan; Barklund, PiaAbstract
Epidemics of Scots pine blister rust, caused by Cronartium pini, have become an increasing problem in northern Finland and Sweden. The biology of the rust fungus is complex, with two different life cycle forms that cannot be morphologically distinguished, and it is unclear to what extent the two forms contribute to the epidemics. Genetic structure of fourteen populations of C. pini were investigated in Fennoscandia. Distinction between the two life cycle forms, a heteroecious and an autoecious one, was made by determining zygosity using microsatellite markers, and AFLP markers were developed to analyse population genetic relationships. The results showed that the two life cycle forms are clearly differentiated and occur in separate populations. Within the life cycle forms, geographic differentiation was evident, probably due to restricted gene flow as well as connection with different alternating hosts. The host-alternating form dominated in the epidemic regions in northern Fennoscandia. Implications for silvicultural practices are discussed. (C) 2021 The Authors. Published by Elsevier Ltd.Keywords
Cronartium flaccidum; Peridermium pini; Endocronartium pini; Pinus sylvestris; Scots pine blister rust; Resin-top disease; Stem rust; Population genetics; Genetic diversity; Alternate hostsPublished in
Fungal Ecology2021, volume: 50, article number: 101032
Publisher: ELSEVIER SCI LTD
Authors' information
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Kaitera, Juha
University of Oulu
Persson, Torgny
Forestry Research Institute of Sweden, Skogforsk
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology
UKÄ Subject classification
Ecology
Publication Identifiers
DOI: https://doi.org/10.1016/j.funeco.2020.101032
URI (permanent link to this page)
https://res.slu.se/id/publ/111392