Phylogeographical patterns of a generalist acorn weevil: insight into the biogeographical history of broadleaved deciduous and evergreen forests.
Phylogeographical patterns of a generalist acorn weevil: insight into the biogeographical history of broadleaved deciduous and evergreen forests.
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DOI：
10.1186/1471-2148-9-103
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发表时间：
2009-05-16
影响因子：
3.4
通讯作者：
Murakami N
中科院分区：
文献类型：
--
作者：
Aoki K;Kato M;Murakami N
冰川期的气候变化对生物体的近代进化史产生了重大影响，即使是在陆地没有冰盖覆盖的岛屿上的温带森林中。我们调查了日本落叶栎林和万年青林中壳斗科植物的多面手种子捕食者--锡金象鼻虫的地理分布格局。将其遗传结构与另一种寄主特异性种子捕食者C. hilgendorfi，只栖息在万年青森林中。对采自33个居群的115个个体的921 bp线粒体DNA进行了分析。锡金栎属（Quercus）、石栎属（Lithocarpus）和锥属（Castanopsis）3属11种植物。分子方差分析表明，大部分（近50%，P < 0.001）的总遗传方差可以解释两个地理区域之间的差异，日本主岛的西南部和东北部。与此相反，没有显着的遗传分化的象甲之间的植被类型的利用寄主植物物种观察。在中国四国地区，多面手和寄主特异性种子捕食者的地理分布格局显示出一致的遗传边界。我们的研究结果表明，地质和历史环境有助于形成目前的遗传结构的C。锡金人在本研究中观察到的两种类型的壳斗科相关的在中国四国地区的遗传分化的地理模式也观察到在日本的温暖和凉爽的温带地区生长的几种植物。这一共同模式的发生表明，日本的落叶栎和万年青森林在冰川时代在主岛西南部和东北部的小避难所中一起生存，或彼此相邻，尽管这两种类型的森林目前分别分布在日本的冷温带和暖温带。
Climatic changes during glacial periods have had a major influence on the recent evolutionary history of living organisms, even in temperate forests on islands, where the land was not covered with ice sheets. We investigated the phylogeographical patterns of the weevil Curculio sikkimensis (Curculionidae), a generalist seed predator of Fagaceae plants living in both deciduous oak and evergreen forests of Japan. Its genetic structure was compared to that of another host-specific seed predator, C. hilgendorfi, inhabiting only evergreen forests. We examined 921 bp of mitochondrial DNA for 115 individuals collected from 33 populations of C. sikkimensis from 11 plant species of three genera, Quercus, Lithocarpus, and Castanopsis. An analysis of molecular variance revealed that a large proportion (almost 50%, P < 0.001) of the total genetic variance could be explained by differences between two geographical regions, the southwestern and northeastern parts of the main islands of Japan. In contrast, no significant genetic differentiation of the weevil was observed among vegetation types of their utilized host plant species. The phylogeographical patterns of the generalist and the host-specific seed predator exhibited a congruent genetic boundary in the Chugoku-Shikoku region. Our results suggest that geology and historical environment have contributed to shaping the present genetic structure of C. sikkimensis. The geographical patterns of genetic differentiation in the Chugoku-Shikoku region observed in the two types of Fagaceae-associated Curculio in this study have also been observed in several plant species growing in warm and cool temperate zones of Japan. The occurrence of this common pattern suggests that deciduous oak and evergreen forests of Japan survived together, or adjacent to each other, in small refugia during glacial ages, in the southwestern and northeastern parts of the main islands, although these two types of forests are presently distributed in cool and warm temperate zones of Japan, respectively.
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影响因子：
3
作者：
Aoki, Kyoko;Matsumura, Toshikazu;Murakami, Noriaki
通讯作者：
Murakami, Noriaki
影响因子：
4.9
作者：
Clement, M;Posada, D;Crandall, KA
通讯作者：
Crandall, KA
影响因子：
3.4
作者：
Brochmann, C;Gabrielsen, TM;Elven, R
通讯作者：
Elven, R
影响因子：
2.8
作者：
Aoki, K;Suzuki, T;Murakami, N
通讯作者：
Murakami, N
影响因子：
2.8
作者：
Fujii, N;Ueda, K;Shimizu, T
通讯作者：
Shimizu, T