Variability on the dot chromosome in the Drosophila simulans clade
Variability on the dot chromosome in the Drosophila simulans clade
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DOI：
10.1023/a:1022983023900
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发表时间：
2003-05-01
期刊：
影响因子：
1.5
通讯作者：
Kliman, RM
中科院分区：
文献类型：
--
作者：
Noor, MAF;Kliman, RM
最近的一项研究表明，拟果蝇和果蝇之间最近的核基因渐渗。mauritiana可能掩盖了估计D. simulans clade，包括这两个种和D. sechellia。在这里，我们报告在这个物种组中的无眼基因的内含子的序列变异。这种基因应该在这些物种之间自由渗入，因为它与任何已知的基因交换障碍无关。我们还重新评估了该分支中物种之间的序列分歧水平，注意到低重组区域（如所有4号染色体基因座）相对于其他基因座的基因座之间的差异。总体而言，没有一个分析的数据与最近的基因渗入完全一致D。simulans和D.毛里求斯。
A recent study suggested that recent nuclear gene introgression between Drosophila simulans and D. mauritiana may have obscured efforts to estimate the phylogeny of the species of the D. simulans clade, which includes these two species and D. sechellia. Here, we report sequence variation of an intron of the eyeless gene in this species group. This gene should introgress freely between these species because it is not linked to any known barriers to gene exchange. We have also reevaluated levels of sequence divergence among species in this clade, noting differences between loci in regions of low recombination (as in all chromosome 4 loci) relative to other loci. Overall, none of the data analyzed were consistent with recent introgression exclusively between D. simulans and D. mauritiana.