Lack of genetic differentiation among subpopulations of the black-footed albatross on the Bonin Islands
Lack of genetic differentiation among subpopulations of the black-footed albatross on the Bonin Islands
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DOI：
10.1111/j.1469-7998.2010.00749.x
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发表时间：
2011-01-01
影响因子：
2
通讯作者：
Isagi, Y.
中科院分区：
文献类型：
--
作者：
Ando, H.;Kaneko, S.;Isagi, Y.
濒危黑脚信天翁Phoebastria nigripes表现出强烈的巢忠诚度和纳塔尔亲。这些生物学特征可以强烈地影响种群动态和种群遗传结构。因此，研究其遗传多样性和种群遗传结构对于长期保护具有重要意义。我们进行了遗传分析，使用11个多态性微卫星标记的77个黑脚信天翁从6个繁殖殖民地的小笠原群岛，一个重要的繁殖区在西北太平洋。在基于群体的分析中，AMOVA结果显示，几乎所有的遗传变异都存在于每个亚群的个体之间。各亚群的F-ST和R-ST值大多为0.000，迁移率为3.0- 5.3%。在个体分析中，结构分析的结果表明，所有的个体都聚在同一个遗传群中。在基于个体间亲缘关系的主坐标分析中，大多数个体作为一个群体分布。虽然信天翁物种强烈philopatric，目前的研究结果表明，6个亚群之间缺乏群体遗传分化和存在足够的基因流，以保持遗传同质性。在主坐标分析中，少数个体在遗传上与大多数其他个体不同，这表明移民的可能性。小笠原群岛上的黑脚信天翁遗传多样性维持状况良好，可作为一个单一的遗传管理单位。
The endangered black-footed albatross Phoebastria nigripes exhibits strong nest fidelity and natal philopatry. These biological features can strongly affect population dynamics and population genetic structure. Therefore, for its long-term conservation, it is important to estimate genetic diversity and population genetic structure. We performed genetic analyses, using 11 polymorphic microsatellite markers of 77 black-footed albatrosses from six breeding colonies on the Bonin Islands, an important breeding area in the western North Pacific. In the population-based analysis, AMOVA results showed that almost all genetic variations existed among individuals in each subpopulation. Most F-ST and R-ST values among the subpopulations were 0.000 and the migration rates were 3.0-5.3%. In the individual-based analysis, the results of structure analysis suggested that all the individuals were clustered into the same genetic group. In the principal coordinates analysis based on kinship among individuals, most of the individuals were distributed as a single group. Although albatross species are strongly philopatric, the present results indicate a lack of population genetic differentiation among six subpopulations and the presence of sufficient gene flow to maintain the genetic homogeneity. In the principal coordinates analysis, a few individuals were genetically different from most of the other individuals, indicating a probability of immigration. The black-footed albatrosses on the Bonin Islands are in a good condition to maintain genetic diversity and can be treated as a single genetic management unit.