Higher resistance of the offspring of Scots pine trees resulting from natural regeneration in old foci ofHeterobasidion annosumroot rot

Autor:	M. Filipiak, Anna Napierała-Filipiak
Rok vydání:	2012
Předmět:	biology Resistance (ecology) Inoculation Offspring Heterobasidion annosum Scots pine food and beverages Forestry Natural regeneration Fungal pathogen biology.organism_classification Horticulture Botany Root rot
Zdroj:	Scandinavian Journal of Forest Research. 27:794-799
ISSN:	1651-1891 0282-7581
DOI:	10.1080/02827581.2012.685748
Popis:	Heterobasidion annosum (Fr.) Bref. is a fungal pathogen causing annosum root rot – one of the most economically important diseases in coniferous stands. The major aim of this study was to compare the resistance of the offspring of Scots pine trees (Pinus sylvestris L.) from seed orchards and the offspring of trees that were naturally reproduced in old foci of the disease. In experiments conducted in vitro, we used 960 seedlings which were grown from seeds collected from 60 trees in 6 old foci of the disease and 640 seedlings grown from seeds collected in 4 seed orchards. The offspring of trees from seed orchards after inoculation with H. annosum had nearly twofold higher mortality rate than the seedlings developed from the seeds collected in old foci of the disease. This suggests that the offspring of self-sown trees in old foci of the disease has a greater, genetically conditioned resistance to annosum root rot.
Databáze:	OpenAIRE
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