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Correlation of seedling size and branch number with disease resistance of P inus thunbergii seedlings to B ursaphelenchus xylophilus
Author(s) -
Hakamata T.,
Kato K.,
Yamamoto S.
Publication year - 2013
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12026
Subject(s) - seedling , biology , inoculation , pinus thunbergii , bursaphelenchus xylophilus , horticulture , wilt disease , plant disease resistance , resistance (ecology) , botany , nematode , agronomy , ecology , biochemistry , gene
Summary Japanese black pine ( P inus thunbergii ) seedlings resistant to pine wood nematode ( PWN ; B ursaphelenchus xylophilus ) are routinely selected in J apanese field inoculation trials. Correlations between morphological factors (such as height, stem diameter at ground level and number of branches on seedlings) and disease resistance were examined to improve the production efficiency of 1‐year‐old black pine seedlings for inoculation. Family relatedness and environmental conditions strongly affected seedling resistance; accordingly, logistic regression analysis was used to separate effects of these two variables. Height and stem diameter at ground level significantly correlated with disease resistance in seedlings inoculated with PWN . Because (a) interactions between stem diameter at ground level and environmental condition were significant and (b) height did not interact with any other factor, it was concluded that height of 1‐year‐old Japanese black pine seedlings independently correlated with PWN resistance. Thus, field inoculation tests should use tall seedlings to achieve enhanced survival rates.