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首页> 外文期刊>Marine biology >Comparative analysis on the genetic population structures of the deep-sea whelks Buccinum tsubai and Neptunea constricta in the Sea of Japan
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Comparative analysis on the genetic population structures of the deep-sea whelks Buccinum tsubai and Neptunea constricta in the Sea of Japan

机译：日本海深海螺柏和海螺的遗传种群结构比较分析

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摘要

The population structures of Buccinum tsubai and Neptunea constricta were compared using partial sequences of the mitochondrial COI gene. B. tsubai included four genetically distinguishable subpopula-tions (Hokkaido, Yamagata-Toyama, Yamato Bank, and San'in), which is consistent with the results of our previous study using mitochondrial 16SrRNA sequences. The genetic structure of N. constricta was also clear, but the lineage sorting corresponding to the geographical distribution was not as clear as that of B. tsubai. The difference between the genetic structures of these two species might be due to a difference in either their dispersal abilities or the historic distribution patterns in the Sea of Japan. The fossil record and nested clade analyses support the latter alternative. The four subpopulations of B. tsubai are estimated to have diverged 0.42-1.46 million years ago, providing support for the existence of intermediate water of normal salin- ity and oxygen concentration capable of sustaining B. tsubai between the low-salinity surface water and anoxic deep water during the Pleistocene glacial periods. The genetic diversity of the Yamato Bank subpop-ulation of B. tsubai was lower than that of the other subpopulations, which is likely attributable to the small size of the Yamato Bank subpopulation.
机译：使用线粒体COI基因的部分序列比较了印度琥珀和海王星的种群结构。柏白僵菌包括四个遗传上可区分的亚种群（北海道，山形富山，大和银行和山阴），这与我们先前使用线粒体16SrRNA序列进行的研究结果一致。收缩猪笼草的遗传结构也很清楚，但与地理分布相对应的谱系排序却不如tsubai tsubai。这两个物种的遗传结构之间的差异可能是由于它们在日本海中的扩散能力或历史分布模式的差异所致。化石记录和嵌套进化枝分析支持后一种选择。据估计，B。tsubai的四个亚群在0.42-1.46百万年前已经分化，这为存在能够维持低盐度地表水和缺氧的B. tsubai的正常盐度和氧气浓度的中间水提供了支持。更新世冰川期的深水。 B. tsubai大和银行亚群的遗传多样性低于其他亚群，这可能归因于大和银行亚群的小规模。

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