Kin-Aggregations Explain Chaotic Genetic Patchiness, a Commonly Observed Genetic Pattern, in a Marine Fish.
Kin-Aggregations Explain Chaotic Genetic Patchiness, a Commonly Observed Genetic Pattern, in a Marine Fish.
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DOI：
10.1371/journal.pone.0153381
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Heath DD
中科院分区：
文献类型：
--
作者：
Selwyn JD;Hogan JD;Downey-Wall AM;Gurski LM;Portnoy DS;Heath DD
混乱的遗传斑块现象是海洋生物中常见的模式，特别是那些有底层成体和上层幼体的生物。这种模式通常与抽奖招募和可变的繁殖成功有关。在这里，我们调查的生物学基础，这种模式在一个物种的海洋虾虎鱼personatus。我们发现，该物种的人口显示出混乱的遗传斑块的迹象，包括：小，但显着的，在短距离内的遗传结构的差异;空间位置之间的分化的非平衡或“混乱”的模式;和内位点，内人口偏离哈迪-温伯格平衡（HWE）的期望。我们表明，尽管有一个远洋幼虫阶段，并广泛分布在加勒比海珊瑚礁，这个物种形成群体的高度相关的个人在小空间尺度（<10米）。这些空间聚集的家庭群体导致观察到的偏离HWE和当地人口分化，这一发现很少得到证实，但可能比以前认为的更常见。
The phenomenon of chaotic genetic patchiness is a pattern commonly seen in marine organisms, particularly those with demersal adults and pelagic larvae. This pattern is usually associated with sweepstakes recruitment and variable reproductive success. Here we investigate the biological underpinnings of this pattern in a species of marine goby Coryphopterus personatus. We find that populations of this species show tell-tale signs of chaotic genetic patchiness including: small, but significant, differences in genetic structure over short distances; a non-equilibrium or “chaotic” pattern of differentiation among locations in space; and within locus, within population deviations from the expectations of Hardy-Weinberg equilibrium (HWE). We show that despite having a pelagic larval stage, and a wide distribution across Caribbean coral reefs, this species forms groups of highly related individuals at small spatial scales (<10 metres). These spatially clustered family groups cause the observed deviations from HWE and local population differentiation, a finding that is rarely demonstrated, but could be more common than previously thought.