TY - JOUR
T1 - Effect of local stand density on reproductive processes of the sub-boreal conifer Picea jezoensis Carr. (Pinaceae)
AU - Tomita, Motoshi
AU - Saito, Hideyuki
AU - Suyama, Yoshihisa
N1 - Funding Information:
We thank K. Takahashi, M. Shibuya, H. Iijima and the members of Laboratory of Silviculture, Hokkaido University for field assistance and general advice during the research. We thank K. Yamamoto for allowing access to the study site, H. Yoshimaru and M. Aizawa for technical information for genetic analysis, S. Goto for critical comments on an earlier draft of the manuscript, and N. Ueno, Y. Hasegawa, N. Numano, M. Kanno, M. Ando, K. Uchiyama and anonymous reviewers for useful comments on the manuscript. This study was financially supported by the Japan–Korea Basic Scientific Cooperation Program of the Japan Society for the Promotion of Science.
PY - 2008/9/5
Y1 - 2008/9/5
N2 - 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.
AB - 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.
KW - Local stand density management
KW - Microsatellite markers
KW - Pollen pool diversity
KW - Wind-pollinated trees
KW - Yezo spruce
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U2 - 10.1016/j.foreco.2008.06.037
DO - 10.1016/j.foreco.2008.06.037
M3 - Article
AN - SCOPUS:49749107001
SN - 0378-1127
VL - 256
SP - 1350
EP - 1355
JO - Forest Ecology and Management
JF - Forest Ecology and Management
IS - 6
ER -