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

为了在景观尺度上评价赤松天然种群间的详细遗传连通性，对原地保护林中相邻的9个种群的分散种子的父本配子和母本配子的遗传多样性和异质性分别进行了准确的评估。父本配子的等位基因多样性普遍较高，景观内各种群间的遗传组成基本一致。另一方面，成株数在200株以下的群体母本配子的等位基因多样性显著偏低。母体配子的遗传组成在种群间具有较大的异质性，在200米范围内也表现出显著的空间自相关性。这些结果将是考虑保护林种群规模和邻近种群数量的基本信息，从而确保下一代的遗传多样性和频繁的种群间基因流动。

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.