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

为了在景观尺度上详细评价赤松天然种群间的遗传连接性，分别对分布在原位保护林中的相邻9个赤松种群的分散种子的父配子和母配子的遗传多样性和异质性进行了准确的评价。父本配子的等位基因多样性普遍较高，遗传组成在景观内的种群之间几乎是同质的。另一方面，母株小于200株的群体的等位基因多样性显著较低。母体配子的遗传组成在居群间具有较大的异质性，并且在200 m范围内表现出显著的空间自相关性。这些结果将是考虑保护林中种群大小和邻近种群数量的基本信息，这可以确保下一代的遗传多样性，也可以确保种群间的基因流动。

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.