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has been cited by the following article:

• TITLE: The Effects of Multilocus Heterozygosity on the Longevity of Seedlings Established on Fallen Logs in Picea jezoensis and Abies sachalinensis

  AUTHORS: Momoko Okada, Keiko Kitamura, Chunlan Lian, Susumu Goto

  KEYWORDS: Cox Proportional Hazards Model, Fallen Log, Inbreeding Depression, Microsatellite, Survival Census, Tree Regeneration

  JOURNAL NAME: Open Journal of Forestry, Vol.5 No.4, April 13, 2015

  ABSTRACT: Seedling establishment on fallen logs is a major regeneration system for tree species in boreal forests. Seedling survival on fallen logs is affected not only by the microsite environment but also by the genetic factors of individuals. To quantify the genetic effects on seedling longevity, we identified seedlings using a number tag system and collected needles of Picea jezoensis and Abies sachalinensis established on fallen logs in spring 2006. Survival or death of each seedling was investigated during 2006-2012. We genotyped seedlings with microsatellite markers and calculated individual-based multilocus heterozygosity (MLH) for each seedling. A Cox proportional hazards model was applied to evaluate the effects of MLH on seedling longevity of the two species considering the fallen log conditions. The model indicated that MLH positively affected seedling longevity in P. jezoensis, whereas the effects of MLH were not significant in A. sachalinensis. Here, we discuss differences in the effects of MLH on seedling longevity between the two species, considering species characteristics and MLH frequency distribution.