Molecular population structure of the kuruma shrimp Penaeus japonicus species complex in western Pacific
Molecular population structure of the kuruma shrimp Penaeus japonicus species complex in western Pacific
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DOI：
10.1007/s00227-006-0426-x
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发表时间：
2007-03
期刊：
影响因子：
2.4
通讯作者：
K. Tsoi;T. Chan;K. Chu
中科院分区：
文献类型：
--
作者：
K. Tsoi;T. Chan;K. Chu
在先前对南中国海域日本对虾的研究中，我们检测到两个形态相似的品种(I和II)之间存在着高度的遗传差异，它们的甲壳上有明显的色带图案，这表明存在着神秘的物种。在本研究中，我们通过调查来自10个地方的对虾的遗传分化，阐明了这两个品种在西太平洋的地理分布。两个地中海地区的人口也被包括在内进行比较。根据线粒体DNA序列数据，这些虾被划分为代表这两个变种的两个不同的分支。品种I包括来自日本和中国(包括台湾)的种群，而品种II包括来自东南亚(越南、新加坡和菲律宾)、澳大利亚和地中海的种群。品种II的群体分化明显，两个线粒体标记的限制性内切酶图谱和两个微卫星座位的分析支持这一点。澳大利亚人在遗传上与其他人不同，而东南亚人和地中海人则表现出密切的遗传关系。品种I在这三个地区均不存在，而品种II在南海北部沿海和台湾发现的比例较小，构成了这两个品种的共生区。本研究揭示了高遗传多样性的OFP。日本鱼。进一步研究这种物种复合体的遗传结构，特别是印度洋和地中海的种群，不仅是为了了解这种虾的进化史，也是为了改进这一重要生物资源的基于知识的渔业管理和水产养殖发展计划。
In a previous study on the kuruma shrimpPenaeus japonicusfrom the South China Sea, we detected high genetic divergence between two morphologically similar varieties (I and II) with distinct color banding patterns on the carapace, indicating the occurrence of cryptic species. In the present study, we clarify the geographical distribution of the two varieties in the western Pacific by investigating the genetic differentiation of the shrimp from ten localities. Two Mediterranean populations are also included for comparison. Based on the mitochondrial DNA sequence data, the shrimps are separated into two distinct clades representing the two varieties. Variety I comprises populations from Japan and China (including Taiwan), while variety II consists of populations from Southeast Asia (Vietnam, Singapore and the Philippines), Australia and the Mediterranean. Population differentiation is evident in variety II, as supported by restriction profiles of two mitochondrial markers and analysis of two microsatellite loci. The Australian population is genetically diverged from the others, whereas the Southeast Asian and Mediterranean populations show a close genetic relationship. Variety I does not occur in these three localities, while a small proportion of variety II is found along the northern coast of the South China Sea and Taiwan, which constitute the sympatric zone of the two varieties. The present study reveals high genetic diversity ofP. japonicus. Further studies on the genetic structure of this species complex, particularly the populations in the Indian Ocean and Mediterranean, are needed not only to understand the evolutionary history of the shrimp, but also to improve the knowledge-based fishery management and aquaculture development programs of this important biological resource.