Population structure of chum salmon (Oncorhynchus keta) across the Pacific Rim, determined from microsatellite analysis
Population structure of chum salmon (Oncorhynchus keta) across the Pacific Rim, determined from microsatellite analysis
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通过微卫星分析确定环太平洋地区鲑鱼（Oncorhynchus keta）的种群结构
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Wetklo
中科院分区：
文献类型：
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作者：
T. Beacham;J. Candy;K. Le;M. Wetklo
通过微卫星变异调查研究了太平洋沿岸大麻哈鱼（Oncorhynchus凯塔）的种群结构，以描述遗传变异的分布，并评估大麻哈鱼是否可能起源于两个或多个冰川避难所，
冰川消退后向新的栖息地扩散。从韩国到华盛顿州的380多个地点取样的53，000多条鲑鱼调查了14个微卫星位点的变异。所有群体和位点的遗传分化指数FST为
0.033，个体位点值范围为0.009至0.104。遗传多样性最大的鲑鱼从亚洲，特别是日本，而鲑鱼从斯基纳河和夏洛特女王群岛在北方不列颠哥伦比亚省和那些从华盛顿州鲑鱼相比，在其他地区显示最少的等位基因。不同地区和不同种群大麻哈鱼等位基因频率的差异
区域内的年变化率约为种群内年变化率的18倍。观察到的一般模式是种群的区域结构，
鲑鱼产卵在不同的支流内的主要河流排水或产卵在较小的河流在地理
与不同主要河流流域或地理区域的种群相比，
地区环太平洋鲑鱼的种群结构支持末次冰期期间至少有两个避难所（北方和南方）的概念，但
四个可能的避难所更好地符合观察到的遗传变异分布。微卫星分布
太平洋沿岸鲑鱼的变异可能反映了鲑鱼的起源，
最后一个冰河时期。
The Pacific Rim population structure of chum salmon (Oncorhynchus keta) was examined with a survey of microsatellite variation to describe the distribution of genetic variation and to evaluate whether chum salmon may have originated from two or more glacial refuges following
dispersal to newly available habitat after glacial retreat. Variation at 14 microsatellite loci was surveyed for over 53,000 chum salmon sampled from over 380 localities ranging from Korea through Washington State. An index of genetic differentiation, FST, over all populations and loci was
0.033, with individual locus values ranging from 0.009 to 0.104. The most genetically diverse chum salmon were observed from Asia, particularly Japan, whereas chum salmon from the Skeena River and Queen Charlotte Islands in northern British Columbia and those from Washington State displayed the fewest number of alleles compared with chum salmon in other regions. Differentiation in chum salmon allele frequencies among regions and populations within
regions was approximately 18 times greater than that of annual variation within populations. A regional structuring of populations was the general pattern observed, with chum
salmon spawning in different tributaries within a major river drainage or spawning in smaller rivers in a geographic
area generally more similar to each other than to populations in different major river drainages or geographic
areas. Population structure of chum salmon on a Pacific Rim basis supports the concept of a minimum of two refuges, northern and southern, during the last glaciation, but
four possible refuges fit better the observed distribution of genetic variation. The distribution of microsatellite
variation of chum salmon on a Pacific Rim basis likely reflects the origins of salmon radiating from refuges after
the last glaciation period.
影响因子：
1.4
作者：
S. Sato;H. Kojima;J. Ando;H. Ando;R. Wilmot;L. Seeb;V. Efremov;L. Leclair;W. Buchholz;D. Jin;S. Urawa;M. Kaeriyama;A. Urano;S. Abe
通讯作者：
S. Sato;H. Kojima;J. Ando;H. Ando;R. Wilmot;L. Seeb;V. Efremov;L. Leclair;W. Buchholz;D. Jin;S. Urawa;M. Kaeriyama;A. Urano;S. Abe