Genetic evidence of stable northward extension of Pinus thunbergii Parl. forests in the Democratic People's Republic of Korea
Genetic evidence of stable northward extension of Pinus thunbergii Parl. forests in the Democratic People's Republic of Korea
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DOI：
10.1007/s10722-022-01359-w
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发表时间：
2022-03-02
影响因子：
2
通讯作者：
Junaff, Il-Yop
中科院分区：
文献类型：
--
作者：
Ho, Un-Hyang;Songnaff, Sam-Rang;Junaff, Il-Yop
具有高耐盐性的日本黑松（Pinus thunbergii Parl.）可能在沿海地区扮演防风林的角色，成为维持陆地生态系统的重要组成部分。由于朝鲜半岛有日本黑松在亚洲的北分布界限，因此将是澄清松树种分布转移的一个重要地区。本研究的主要目的是验证北北北迁的遗传证据。利用核SSR标记分析了朝鲜半岛9个种群的遗传背景与气温、降水等气候因子变化的关系。东部组（AR= 10.7，与19.5相似）和西部组（AR= 10.3，与10.7相似）的遗传多样性高于北部组（AR= 6.7，与8.8相似）。当推测群数(K)=2时，整个个体可分为西群和东北群，当K=3时，东北群可分为北群和东群。通过nSSR标记验证的系统地理关系表明，朝鲜地区气温的大幅升高使得红杉林的人为转移较为稳定，人工造林可能由于气候变化导致森林生态系统的快速建立。
Japanese black pine (Pinus thunbergii Parl.) with high salt tolerance may be an important constitutive element sustaining terrestrial ecosystem by playing a role of windbreak forests in coastal areas. Korean peninsula would be a notable region in clarifying distribution shift in Pinus species as it has northern distribution limit of Japanese black pine in Asia. Our main object was to verify genetic evidence of stable northward extension of P. thunbergii populations in DPR Korea. We investigated genetic background of 9 populations existing in Korean peninsula using nuclear SSR markers in relation to shifts in climate factors such as temperature and precipitation. Higher genetic diversity in east group (AR =10.7 similar to 19.5) and west group (AR =10.3 similar to 10.7) compared to north group (AR= 6.7 similar to 8.8) was found. When number of putative clusters (K)=2, whole individuals were divided into west group and northeast group, and when K=3, north-east group can be separated into north group and east group. Phylogeographic relationship verified by means of nSSR markers suggest that substantial increment of air temperature in DPR Korea allowed stable anthropogenic transfer of P. thunbergii forests and that artificial afforestation may bring rapid establishment of forest ecosystem owing to climate change.