Effect of local stand density on reproductive processes of the sub-boreal conifer Picea jezoensis Carr. (Pinaceae)

Motoshi Tomita, Hideyuki Saito, Yoshihisa Suyama

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The effect of local pollen donor density (conspecific) and local total tree density (all species) on pollen pool diversity, outcrossing rate, and filled seed ratio were examined in a natural stand of the sub-boreal conifer Picea jezoensis Carr. Seed cones were collected from 17 mother trees, and the percentage of filled seed were calculated for five cones per tree. In addition, local stand density of pollen donors and total trees were investigated within r < 30 m from the focal mother trees. Using four polymorphic microsatellite markers, the average pairwise kinship coefficient FS and multilocus outcrossing rate tm were estimated on germinated seedlings sampled from 14 mother trees. FS showed significant positive correlation to local total tree density (r = 0.541, p = 0.046). Since FS is inversely proportional to the effective number of pollen donors Nep, genetic diversity of pollen pool was decreased in mother trees with higher local total tree density. Applying a generalized linear mixed model to filled seed ratio and local stand density of pollen donors and total trees, a negative impact of local pollen donors on filled seed ratio was found. We conclude that both local stand density as well as global stand density are important in the management of a natural stand of P. jezoensis.

Original languageEnglish
Pages (from-to)1350-1355
Number of pages6
JournalForest Ecology and Management
Volume256
Issue number6
DOIs
Publication statusPublished - 2008 Sep 5

Keywords

  • Local stand density management
  • Microsatellite markers
  • Pollen pool diversity
  • Wind-pollinated trees
  • Yezo spruce

ASJC Scopus subject areas

  • Forestry
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law

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