Simultaneous evaluation of paternal and maternal gametic dynamics of Pinus densiflora dispersed seeds at the landscape scale

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To evaluate detailed genetic connectivity among natural populations of Pinus densiflora at the landscape scale, genetic diversity and heterogeneity of both paternal and maternal gametes of the dispersed seeds were assessed separately and accurately for the adjacent 9 populations in an in-situ conservation forest. Allelic diversity of paternal gametes was generally high and the genetic composition was nearly homogeneous among populations within landscape. On the other hand, maternal gametes of the population with less than 200 adult trees had significantly low allelic diversity. Genetic compositions of maternal gametes were more heterogeneous among populations, and also showed a significant spatial autocorrelation within up to 200m. These results would be fundamental information to consider about the population size and the number of nearby populations in the conservation forest, which can secure genetic diversity of the next generation and also frequent interpopulation gene flow.