Phylogeography of a northeast Asian spruce, Picea jezoensis, inferred from genetic variation observed in organelle DNA markers
Phylogeography of a northeast Asian spruce, Picea jezoensis, inferred from genetic variation observed in organelle DNA markers
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DOI：
10.1111/j.1365-294x.2007.03391.x
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发表时间：
2007-08-01
影响因子：
4.9
通讯作者：
Kaji, M.
中科院分区：
文献类型：
--
作者：
Aizawa, M.;Yoshimaruth, H.;Kaji, M.
利用母本遗传的线粒体DNA和父本遗传的叶绿体DNA标记，研究了广泛分布于东北亚的冷温带云杉云杉的遗传变异。这项研究评估了日本、俄罗斯、中国和韩国的13个自然种群，包括该物种的三个变种。根据线粒体单倍型的地理分布模式(G(ST)=0.934-90 1；N-ST=90 1)，我们描绘了日本海峡周围的尖锐缝合带。相反，在过去的种群历史中，我们在叶绿体单倍型的分布模式(G(ST)=0.233；N-ST=0.333)中检测到可能存在广泛的花粉流动，而不是种子通过日本海峡。对物种间距离隔离的分析表明，尖锐的缝合带作为种子和花粉移动的屏障，对种群间的遗传分化水平有相当大的贡献。构建的线粒体单倍型网络允许推断该物种的系统地理历史。我们推断，与堪察加种群的分离反映了当前分布以北的范围扩大和缩小。在日本，我们在北海道和本州岛之间发现了不同类型的热带病原虫；本州岛的热带病原虫可能是从亚洲大陆通过朝鲜半岛殖民到该地区的，北海道岛的物种很可能是通过大陆桥从亚洲大陆经由库页岛传播的。北海道和本州岛线粒体单倍型的日本特有可能是由于这些岛屿在第四纪晚期相互分离并通过海峡与亚洲大陆分离而促进的。
Range-wide genetic variation of the widespread cold-temperate spruce Picea jezoensis was studied throughout northeast Asia using maternally inherited mitochondrial DNA and paternally inherited chloroplast DNA markers. This study assessed 13 natural populations including three varieties of the species in Japan, Russia, China, and South Korea. We depicted sharp suture zones in straits around Japan in the geographical distribution pattern of mitochondrial haplotypes (G(ST) = 0-901; N-ST = 0.934). In contrast, we detected possible extensive pollen flow without seed flow across the straits around Japan during the past population history in the distribution pattern of chloroplast haplotypes (G(ST) = 0.233; N-ST = 0.333). The analysis of isolation by distance of the species implied that by acting as a barrier for the movement of seeds and pollen, the sharp suture zones contributed considerably to the level of genetic differentiation between populations. Constructed networks of mitochondrial haplotypes allowed inference of the phylogeographical history of the species. We deduced that the disjunction with Kamchatka populations reflects range expansion and contraction to the north of the current distribution. Within Japan, we detected phylogeographically different types of P. jezoensis between Hokkaido and Honshu islands; P. jezoensis in Honshu Island may have colonized this region from the Asian continent via the Korean peninsula and the species in Hokkaido Island is likely to have spread from the Asian continent via Sakhalin through land bridges. Japanese endemism of mitochondrial haplotypes in Hokkaido and Honshu islands might have been promoted by separation of these islands from each other and from the Asian continent by the straits during the late Quaternary.