Indo‐West Pacific patterns of genetic differentiation in the high‐dispersal starfish Linckia laevigata
Indo‐West Pacific patterns of genetic differentiation in the high‐dispersal starfish Linckia laevigata
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高分散海星 Linckia laevigata 的印度-西太平洋遗传分化模式
DOI：
10.1046/j.1365-294x.1997.00221.x
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发表时间：
1997
影响因子：
4.9
通讯作者：
J. Benzie
中科院分区：
文献类型：
--
作者：
Suzanne T. Williams;Suzanne T. Williams;J. Benzie
采用限制性内切片段分析方法，研究了印度洋-西太平洋海星llinkia laevigata的四个自然种群的遗传变异。用7种限制性内切酶在326个个体中鉴定出47个单倍型。从每个地点的珊瑚礁遗址收集的样本没有根据ΦST或单倍型的空间分布进行显著区分，表明在中短距离内分散程度很高。单倍型之间的低分化和基因系统发育中不同单倍型之间缺乏明确的地理结构进一步支持了基因流动的证据。然而，分子方差分析（AMOVA）、ΦST和单倍型空间分布的偶然性χ2分析表明，在四个研究的广泛分布地点存在显著的大尺度群体遗传结构。RFLP数据与菲律宾和西澳大利亚之间的高基因流和大堡礁（GBR）和斐济之间的中等基因流一致，但菲律宾或西澳大利亚与GBR或斐济之间的基因流有限。mtDNA结构的存在与先前的同酶数据形成对比，这些数据表明，在高度关联的GBR研究中，在广泛分离的地点之间的分散相当于在人群之间的分散。从这两个标记推断出的基因流模式之间的不一致不能完全用mtDNA有效种群大小的差异来解释。这可能表明，虽然mtDNA变异可能代表当代基因流动模式，但在所调查的范围内，种群间的等位酶变异尚未达到漂变和迁移之间的平衡。
Genetic variation in four natural populations of the starfish Linckia laevigata from the Indo‐West Pacific was examined using restriction fragment analysis of a portion of the mtDNA including the control region. Digestion with seven restriction enzymes identified 47 haplotypes in a sample of 326 individuals. Samples collected from reef sites within each location were not significantly differentiated based on ΦST or spatial distribution of haplotypes, indicating that dispersal is high over short to moderate distances. Evidence of gene flow is further supported by the low divergence among haplotypes and the lack of any clear geographical structuring among different haplotypes in the gene phylogeny. However, analysis of molecular variance (AMOVA), ΦST and contingency χ2 analyses of the spatial distribution of haplotypes demonstrate the presence of significant broad scale population genetic structure among the four widespread locations examined. RFLP data are consistent with high gene flow between the Philippines and Western Australia and moderate gene flow between the Great Barrier Reef (GBR) and Fiji, but only limited gene flow between either the Philippines or Western Australia and either the GBR or Fiji. The presence of mtDNA structure contrasts with previous allozyme data which suggest that dispersal among widely separated locations is equivalent to dispersal among populations within the highly connected GBR studies. This discordance between patterns of gene flow inferred from these two markers cannot be fully accounted for by differences in effective population size for mtDNA. This might suggest that while mtDNA variation may represent contemporary patterns of gene flow, allozyme variation among populations is yet to reach equilibrium between drift and migration over the range surveyed.
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影响因子：
3.3
作者：
M. Slatkin;Wayne P. Maddison
通讯作者：
M. Slatkin;Wayne P. Maddison
影响因子：
10.7
作者：
R. Hudson;D. Boos;N. Kaplan
通讯作者：
R. Hudson;D. Boos;N. Kaplan
影响因子：
3.3
作者：
M. Slatkin;R. Hudson
通讯作者：
M. Slatkin;R. Hudson
影响因子：
3.3
作者：
M. Nei;F. Tajima
通讯作者：
M. Nei;F. Tajima
迁移、突变和漂移下的细胞器基因多样性：平衡预期、平衡方法、异质细胞的影响以及与核基因的比较。
影响因子：
3.3
作者：
BirkyJr,CW;Fuerst,P;Maruyama,T
通讯作者：
Maruyama,T