The speciation history of Drosophila pseudoobscura and close relatives: inferences from DNA sequence variation at the period locus.
The speciation history of Drosophila pseudoobscura and close relatives: inferences from DNA sequence variation at the period locus.
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假暗果蝇及其近亲的物种形成历史：从周期位点 DNA 序列变异的推论。
作者：
Rong;J. Hey
研究了拟黑腹果蝇及其近缘种--拟黑果蝇、拟黑果蝇和米兰达果蝇的35个周期基因座序列。在拟黑粉虱和拟黑粉虱中发现了大量的变异，这与大有效种群规模的历史相一致。然而，美洲斑潜蝇的多样性严重减少。将Per与另外两个基因座的Per结合分析，强烈表明这种减少是由于最近在Dp bogotana内Per或Per附近的定向选择所致。由于羊草是高度多变的，并且在其他基因座上与假黑藻有相同的变异，因此不能用较小的有效种群规模或通过创始人事件的物种形成来解释羊草内PER的低水平变异。假黑粉虱和拟黑粉虱都有相当大的种内基因流。一个D.persimilis序列的很大一部分似乎是通过D.Passoobcura的渐渗而产生的。这一事件发生的时间似乎是在这两个物种最初分离之后很久。据估计，自物种形成以来的时间为假黑斑潜蝇和拟黑斑潜蝇的1个Mya，以及D.Miranda形成以来的2个Mya。
Thirty-five period locus sequences from Drosophila pseudoobscura and its siblings species, D. p. bogotana, D. persimilis, and D. miranda, were studied. A large amount of variation was found within D. pseudoobscura and D. persimilis, consistent with histories of large effective population sizes. D. p. bogotana, however, has a severe reduction in diversity. Combined analysis of per with two other loci, in both D. p. bogotana and D. pseudoobscura, strongly suggest this reduction is due to recent directional selection at or near per within D. p. bogotana. Since D. p. bogotana is highly variable and shares variation with D. pseudoobscura at other loci, the low level of variation at per within D. p. bogotana can not be explained by a small effective population size or by speciation via founder event. Both D. pseudoobscura and D. persimilis have considerable intraspecific gene flow. A large portion of one D. persimilis sequence appears to have arisen via introgression from D. pseudoobscura. The time of this event appears to be well after the initial separation of these two species. The estimated times since speciation are one mya for D. pseudoobscura and D. persimilis and 2 mya since the formation of D. miranda.
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通过醇脱氢酶区域的核苷酸序列分析确定果蝇中的基因流估计。
影响因子：
3.3
作者：
Schaeffer,SW;Miller,EL
通讯作者：
Miller,EL
影响因子：
3.3
作者：
R. Hudson;M. Slatkint;W. Maddison
通讯作者：
R. Hudson;M. Slatkint;W. Maddison
果蝇黄嘌呤脱氢酶位点的核苷酸多态性。
影响因子：
10.7
作者：
Riley,MA;Kaplan,SR;Veuille,M
通讯作者：
Veuille,M
分子遗传学在物种形成研究中的作用。
DOI：
10.1007/978-3-0348-7527-1_26
发表时间：
1994
期刊：
EXS
影响因子：
--
作者：
Templeton,AR
通讯作者：
Templeton,AR
假暗果蝇乙醇脱氢酶区域的限制性图谱变异。
影响因子：
10.7
作者：
Schaeffer,SW;Aquadro,CF;Anderson,WW
通讯作者：
Anderson,WW